8/9/2019 BIM- Pakistan case study
1/76
i
DEVELOPMENT OF BUILDING INFORMATION MODEL
OF OEC TOWER G-9/4, ISLAMABAD
By
MUHAMMAD FAIZAN KHAN 2010-BE-CE-101(Group leader)
USAID ADIL 2010-BE-CE-120
FARZAN SOHAIL 2010-BE-CE-43
UZAIR TAHIR 2010-BE-CE-124
RAJA MEHRAN KHAN 2010-BE-CE-146
(2010-NUST-BE-CIVIL)A report submitted in partial fulfillment
ofthe requirements for the degree ofBachelors of Engineering
InCivil Engineering
NUST Institute of Civil Engineering (NICE)
School of Civil and Environmental Engineering (SCEE)
National University of Sciences and Technology, Islamabad, Pakistan.
(2013)
8/9/2019 BIM- Pakistan case study
2/76
ii
This is to certify that theReport entitled
DEVELOPMENT OF BUILDING INFORMATION MODEL
OF OEC TOWER G-9/4, ISLAMABAD
Submitted by
MUHAMMAD FAIZAN KHAN 2010-BE-CE-101(Group leader)
USAID ADIL 2010-BE-CE-120
FARZAN SUHAIL 2010-BE-CE-43
UZAIR TAHIR 2010-BE-CE-124
RAJA MEHRAN KHAN 2010-BE-CE-146
Has been accepted towards the partial fulfillment
ofthe requirements
forBachelors of Engineering in Civil Engineering
_______________________Engr. Zia Ud Din
Assistant Professor,
Department of Construction Engineering and Management,
National Institute of Transportation (NIT),
School of Civil and Environmental Engineering (SCEE),
National University of Sciences and Technology, Islamabad, Pakistan.
8/9/2019 BIM- Pakistan case study
3/76
iii
DEDICATED
TO
OUR PARENTS
8/9/2019 BIM- Pakistan case study
4/76
iv
TABLE OF CONTENTSCONTENTS PAGENO
ACKNOWLDGEMENT ............................................................................................................ IX
ABSTRACT .................................................................................................................................. X
LIST OF ACRONYMS .............................................................................................................. XI
LIST OF FIGURES .................................................................................................................. XII
LIST OF TABLES ................................................................................................................... XIII
INTRODUCTION......................................................................................................................... 1
1.1 OBJECTIVES ................................................................................................................. 3
1.2 REASONSANDJUSTIFICATIONS ............................................................................. 3
1.2.1 Market Adoption and Growth ..................................................................................... 3
1.2.2 User Experience .......................................................................................................... 3
1.3 ADVANTAGESANDEDUCATIONALOUTCOMES ............................................... 4
1.3.1 Improved Designs ....................................................................................................... 4
1.3.2 Life Cycle Asset Management .................................................................................... 4
1.3.3 Improved Visualization ............................................................................................... 5
1.3.4 Less Wastage .............................................................................................................. 5
1.3.5 Reduced Safety Requirements .................................................................................... 5
1.3.6 Guidelines for Students ............................................................................................... 5
1.3.7 Personal and Social Advantage ................................................................................... 6
1.3.8 Forensic Analysis ........................................................................................................ 61.3.9 Facility Management .................................................................................................. 6
1.4 AREASOFAPPLICATION........................................................................................... 6
1.4.1 Improved Communication: ......................................................................................... 6
1.4.2 Shop Drawings ............................................................................................................ 7
8/9/2019 BIM- Pakistan case study
5/76
v
1.4.3 Cost Estimation ........................................................................................................... 7
1.4.4 Project Scheduling ...................................................................................................... 7
1.4.5 Conflict, Interference and Collision Detection ........................................................... 7
LITERATURE REVIEW ............................................................................................................ 92.1 BACKGROUND ............................................................................................................ 9
2.2 BUILDINGINFORMATIONMODELING .................................................................. 9
2.3 TECHNICALASPECTSOFBIM ................................................................................ 11
2.3.1 Clash Controls ........................................................................................................... 11
2.3.2 Analyses .................................................................................................................... 12
2.3.3 Time Estimation (4D) ............................................................................................... 12
2.3.4 Cost Estimation (5D) ................................................................................................ 13
2.4 BIMLEVELS ............................................................................................................... 13
2.4.1 Level 0Usage of BIM Software ............................................................................ 14
2.4.2 Level 13D Coordination ....................................................................................... 14
2.4.3 Level 2Analyzes, Time and Cost Estimation ........................................................ 14
2.4.4 Level 3Integrated Model ....................................................................................... 14
2.5 TECHNOLOGIESIMPLEMENTEDINBIM ............................................................. 15
2.5.1 CAD Technology ...................................................................................................... 15
2.5.2 Object CAD Technology: ......................................................................................... 16
2.5.3 Parametric Building Modeling .................................................................................. 16
2.6 BIMANDPROJECTMANAGER ............................................................................... 16
2.6.1 Communication Benefits .......................................................................................... 17
2.6.2 Quality Benefits ........................................................................................................ 17
2.7 BIMANDCONSTRUCTIONMANAGEMENT ........................................................ 18
2.7.1 Design Phase ............................................................................................................. 18
2.7.2 Construction Phase.................................................................................................... 192.7.3 Management Phase ................................................................................................... 20
2.8 ADVANTAGESOFBIM ............................................................................................. 20
2.9 BIMIMPLEMENTATIONINREALLIFE ................................................................. 21
2.9.1 Melbourne Stadium ................................................................................................... 21
2.9.2 Water Treatment Plant-Walsh Group ....................................................................... 22
8/9/2019 BIM- Pakistan case study
6/76
vi
2.9.3 Krakow Stadium ....................................................................................................... 22
2.10 BIMTOOLS ................................................................................................................. 23
2.10.1 Autodesk Quantity Takeoff................................................................................... 24
2.10.2 Autodesk Revit...................................................................................................... 24
2.10.3 Autodesk Green Building Studio .......................................................................... 25
2.10.4 Autodesk Navisworks ........................................................................................... 26
METHODOLOGY ..................................................................................................................... 27
3.1 SELECTIONOFTHETOPIC ...................................................................................... 28
3.2 LITERATURESTUDY ................................................................................................ 28
3.3 SITESELECTION........................................................................................................ 28
3.4 DATACOLLECTION.................................................................................................. 28
3.5 LEARNINGSOFTWARE ............................................................................................ 29
3.6 3-DMODELING .......................................................................................................... 29
3.7 CONSTRUCTIONPROCESSSIMULATION ............................................................ 30
3.8 QUANTITYTAKEOFF ............................................................................................... 30
3.9 CLASHDETECTION .................................................................................................. 32
3.10 ENERGYANALYSIS .................................................................................................. 32
3.11 ANALYSIS ................................................................................................................... 32
3.12 CONCLUSION ............................................................................................................. 32
3.13 PREPARINGREPORTANDPRESENTAION ........................................................... 33
3.13.1 5D Model Submission........................................................................................... 33
3.13.2 Preparation of Presentation ................................................................................... 33
CASE STUDY ............................................................................................................................. 34
4.1 PROJECTINTRODUCTION ....................................................................................... 34
4.2 SPECIALFEATURESOFOECTOWER.................................................................... 36
4.3 AREAOFOECTOWER .............................................................................................. 37
4.4 3-DMODEL ................................................................................................................. 37
4.4.1 Architectural Model .................................................................................................. 37
4.4.1.1 Grids .................................................................................................................. 38
4.4.1.2 Levels ................................................................................................................ 38
8/9/2019 BIM- Pakistan case study
7/76
vii
4.4.1.3 Plan Views ........................................................................................................ 39
4.4.1.4 Walls ................................................................................................................. 39
4.4.1.5 Floors ................................................................................................................ 39
4.4.1.6 Openings ........................................................................................................... 39
4.4.1.7 Doors and Windows .......................................................................................... 40
4.4.1.8 Ceilings ............................................................................................................. 40
4.4.1.9 Ramps ............................................................................................................... 40
4.4.1.10 Columns ............................................................................................................ 40
4.4.1.11 Other Components ............................................................................................ 41
4.4.2 Structural Model ....................................................................................................... 41
4.4.2.1 Floors Slabs ....................................................................................................... 41
4.4.2.2 Beams ................................................................................................................ 414.4.2.3 Columns ............................................................................................................ 41
4.4.2.4 Walls ................................................................................................................. 41
4.4.2.5 Stairs ................................................................................................................. 42
4.4.2.6 Foundations ....................................................................................................... 42
4.4.3 HVAC Model ............................................................................................................ 42
4.4.3.1 Loading system template................................................................................ 42
4.4.3.2 Linking architectural model .............................................................................. 42
4.4.3.3 Creating work space .......................................................................................... 43
4.4.3.4 Pipes and ducts .................................................................................................. 43
4.4.3.5 Pipe and duct fittings ........................................................................................ 43
4.4.3.6 Mechanical equipment ...................................................................................... 43
4.4.4 Electrical Model ........................................................................................................ 43
4.4.4.1 System template: ............................................................................................... 43
4.4.4.2 Linking Revit architectural model: ................................................................... 44
4.4.4.4 Types of electrical equipment installed ............................................................ 44
4.4.4.5 Creating a circuit system:.................................................................................. 45
4.4.5 Plumbing Model........................................................................................................ 46
4.5 QUANTITYTAKEOFF ............................................................................................... 47
4.6 SCHEDULE .................................................................................................................. 47
8/9/2019 BIM- Pakistan case study
8/76
viii
4.7 CLASHDETECTION .................................................................................................. 48
4.8 ENERGYANALYSIS .................................................................................................. 49
4.9 QUANTITYCOMPARISON ....................................................................................... 50
4.10 PROBLEMSFACED ................................................................................................... 50
4.11 SUMMARY .................................................................................................................. 51
CONCLUSIONS AND RECOMENDATIONS ....................................................................... 52
5.1 REVIEWOFOBJECTIVES ......................................................................................... 52
5.2 CONCLUSIONS........................................................................................................... 52
5.3 RECOMMENDATIONS .............................................................................................. 52
REFERENCES ............................................................................................................................ 53
APPENDIX -1.............................................................................................................................. 55
APPENDIX -2.............................................................................................................................. 56
APPENDIX-3............................................................................................................................... 57
APPENDIX-4............................................................................................................................... 58
APPENDIX-5............................................................................................................................... 59
APPENDIX-6............................................................................................................................... 60
APPENDIX-7............................................................................................................................... 61
APPENDIX-8............................................................................................................................... 62
APPENDIX-9............................................................................................................................... 63
8/9/2019 BIM- Pakistan case study
9/76
ix
ACKNOWLDGEMENT
We are thankful to Allah Almighty for bestowing upon us the strength to accomplish this project.
We would like to express our profound sense of reverence and deep regards to our supervisorAssistant Professor Zia Ud Din. His exemplary encouragement and constant guidance was the
driving force behind the successful completion of the project. We are indebted to Consultant
Civil Engineer at PRIMACO Mr. Waqas Ather, for providing us the necessary assistance and
information regarding the project.
Last but not the least we would like to pay our earnest gratitude to our parents and our colleagues
for their incredible support and assistance.
8/9/2019 BIM- Pakistan case study
10/76
x
ABSTRACT
Time and cost are major constraints of every construction project. But most of the projects fail to
complete within the estimated budget and schedule. The main reason behind this failure is lackof coordination between different project stakeholders. With the introduction of CAD technology
these hurdles have been minimized. But, still the coordination environment was lacking.
Advancements in technology yielded new approach towards construction known as BIM.
BIM stands for Building Information Modeling. It is a new way of approaching design and
documentation of the building project. It is a comprehensive tool used for designing, initiating,
executing, monitoring, controlling and completing a less time consuming and cost effective
construction project. It encompasses the entire lifecycle of the building including operations. It
provides a 3-D Model that helps in defining and simulating the building, its delivery and
operations with the help of integrated tools. The feature of embedding quantity estimation and
time scheduling together with a 3-D model makes it a 5-D model. In addition to the 5D model
other technical aspects of BIM includes clash detection and energy analysis.
5-d model of a building facility was developed in this project with different features of BIM were
analyzed. The tools used in this project were Autodesk Revit, Autodesk Navisworks, Autodesk
Green Building Studio and Autodesk Quantity Take off for 3-D modeling, scheduling, clash
detection, energy analysis and cost estimation respectively. The project reflected theimprovements in quantities and number of change orders with the use of BIM by comparing the
actual quantities with results obtained from model developed.
8/9/2019 BIM- Pakistan case study
11/76
xi
LIST OF ACRONYMS
3D Three Dimensional x,y,z
CAD Computer Aided DrawingBIM Building Information Modeling
2D Two Dimensional x,y
MEP Mechanical, Electrical and Plumbing
CMM Capability Maturity Model
4-D Fourth dimension-Scheduling
5-D Fifth dimensionCost Estimation
NBIMS National Building Information ModelingStandards
IT Information Technology
PM Project Manager
OEC Overseas Employees Corporation
PVC Polyvinyl Chloride
IPD
EOBI
Integrated Project Delivery
Employees Old-Age Benefits Institution
8/9/2019 BIM- Pakistan case study
12/76
xii
LIST OF FIGURES
FIGURE 1.1 CONSTRUCTION AND NON-FARM LABOR PRODUCTIVITY INDEX ........ 2
FIGURE 1.2 AREAS OF APPLICATION OF BIM (DISPENZA, 2010). .................................. 8FIGURE 2.1 FULLY FUNCTIONAL BIM (JIMNEZ ET AL., 2001).................................... 10
FIGURE 2.2 CLASH DETECTION........................................................................................... 12
FIGURE 2.3 COMPARISON BETWEEN DIFFERENT TECHNOLOGIES (AGC, 2005) ..... 15
FIGURE 2.4 BIM MODELS ...................................................................................................... 19
FIGURE 2.5 BENEFITS OF BIM (YAN & DAMIAN, 2008) .................................................. 21
FIGURE 2.6 KRAKOW STADIUM COMPLEX SPIRAL STRUCTURE ............................... 22
FIGURE 3.1 FLOW CHART OF THE RESEARCH METHODOLOGY ................................ 27
FIGURE 3.2 INTEGRATED MODEL....................................................................................... 30
FIGURE 3.3 QUANTITY TAKEOFF WORKING ................................................................... 31
FIGURE 4.1 OEC TOWER SOUTH EAST ARTISTIC VIEW ................................................ 34
FIGURE 4.2 OEC TOWER NORTH WEST VIEW .................................................................. 35
FIGURE 4.3 OEC TOWER UNDER CONSTRUCTION ......................................................... 36
FIGURE 4.4 SCHEDULE SCREENSHOT ............................................................................... 48
FIGURE 4.5 DUCT BEND AND PLUMBING PIPE CLASH ................................................ 49
FIGURE 4.6 HVAC AND PLUMBING PIPES CLASH ........................................................... 49
http://c/Users/Faizan/Documents/fyp%20report%206%20june2014.docx%23_Toc391361062http://c/Users/Faizan/Documents/fyp%20report%206%20june2014.docx%23_Toc3913610628/9/2019 BIM- Pakistan case study
13/76
xiii
LIST OF TABLES
TABLE 2.1 BIM TOOLS .......................................................................................................... 23
TABLE 4.1 PROJECT STAKEHOLDERS .............................................................................. 35
TABLE 4.2 AREAS OF OEC TOWER .................................................................................... 37
TABLE 4.3 FLOOR LEVELS ................................................................................................... 39
TABLE 4.4 QUANTITY ESTIMATE SUMMARY ................................................................ 47
TABLE 4.5 CLASH DETECTION SUMMARY ..................................................................... 49
TABLE 4.6 QUANTITY COMPARISON ................................................................................ 50
8/9/2019 BIM- Pakistan case study
14/76
1
INTRODUCTION
The construction industry in Pakistan has long been criticized all over the world for being
inefficient and resource consuming. The reason behind the criticism is their unorthodox approach
to construction which is much disorganized and utterly uneconomical (N. Azhar, Farooqui, &
Ahmed, 2008). There is a room for improvement in every phase of construction. The
construction industry has been facing an alarming situation in terms of labor productivity which
is on the decrease since 1960, but it is worth noticing that process industries have increased their
labor productivity. Thus, there is a dire need to balance out the situation to prevent wastage and
cost overruns (Teicholz, 2004).
According to a research, poor project site management, delays between design and procurementphases, incorrect methods of cost estimation and improper planning are one of the major reasons
for cost overruns in the construction industry of Pakistan. As it can be seen from the researches
the main factor behind the downfall is the lack of project integration and coordination. Thus,
with the aid of new technology and digitized environment these hurdles can be triumph over (N.
Azhar et al., 2008).
Impact of technology on construction industry has been positive. The transformation from
manual drafting to computer aided drafting was huge step up in construction industry. It
revolutionized the whole construction industry the design issues were reduced and 2-D CAD
environment provided the user friendly environment to the users to design the building
components. It yielded better results and fewer conflicts than the manual drafting (Hergunsel,
2011).
As manual drafting was hectic, user was more prone to errors and to edit these drawings required
them to be redrawn. The remedy in the shape of CAD environment was perfect at that time.
These 2-D CAD drawings mimic the manual hand drafting in digitized platform which allows
the user to edit them, make revisions and to minimize the complexity of drawings with use oflayer features. But, as the process industries progressed by leaps and bounds with an aid of
modern technology as shown in the figure where we can see that Non-Farm productivity is
increasing with the time. CAD could not keep pace with the process industries in the modern era
as it can be seen from the figure 1.1 that construction productivity did not progressed and the
Chapter 1
8/9/2019 BIM- Pakistan case study
15/76
2
new technology was required to keep pace with the other industries related to the construction
industry (Eastman, Teicholz, Sacks, & Liston, 2008).
Figure 1.1 Construction and Non-Farm Labor Productivity Index (Hergunsel, 2011)
To minimize the wastage, cost overrun, inefficiency and conflicts. There was need of a fullycoordinated and digitized environment to overcome the limitations of CAD technologies and to
increase the labor productivity. Thus, Building information approach was formulated to cater for
these limitations and is the remedy for modern era construction issues.
Today BIM has revolutionized the construction industry .It is the latest technology which is
being widely accepted around the globe. A Building Information Model is a data-rich, object-
oriented 3-D representation of the building project, from which appropriate data as per user
requirement can be extracted to generate information that can be helpful to make decisions and
improve the process of delivering the project (AGC, 2005).
Since the introduction of BIM technology, the potential of software in construction management
has profoundly increased. A Building Information Model contains as much information related
to the building project as can be incorporated. This information can include performance
8/9/2019 BIM- Pakistan case study
16/76
3
information obtained throughout the lifecycle of the project, the buildings features and
characteristics and functions of the building (Yan & Damian, 2008).
1.1 OBJECTIVES
The main objectives of this research were:
I. To develop a 3D Model of a facility using Autodesk Revit for virtual representation of
the real Project.
II. To develop a simulated schedule of the project with the help of Autodesk Navisworks.
III. To perform material takeoff of the project using Autodesk Quantity Takeoff software.
IV. To perform clash detection between different models using Autodesk Navisworks.
V. To perform energy analysis of the model using Autodesk Green Building Studio.
1.2
REASONS AND JUSTIFICATIONS
The reasons and justifications for selection of the project are:
1.2.1 Market Adoption and Growth
Many experienced users are realizing the benefits of BIM modeling such as better
communication, improved productivity, and greater chances of winning over the client. This is
because of the fact that BIM helps in improving coordination between different departments inthe project team due to increased overlapping and integration. This helps in further improving
productivity, enhancing quality control andstrengthening communication systems. A survey has
shown that out of a 100 BIM experts, 82 experts have responded that BIM usage has been very
beneficial in improving the productivity of their firm. BIM usage is not only increasing in the
construction industry but many new firms are starting to adopt this technology (Dobson, 2004).
1.2.2 User Experience
The increasing use of BIM corresponds with a wholly pragmatic assessment of the general
impact on the BIM users business practices. As users begin to see its vast benefits, they deepen
their involvement with BIM. More than half of the users claim that BIM has had a very positive
impact on their respective firms.
A recent survey shows that in Construction Industry:
http://thesaurus.com/browse/strengthenhttp://thesaurus.com/browse/correspondhttp://thesaurus.com/browse/correspondhttp://thesaurus.com/browse/strengthen8/9/2019 BIM- Pakistan case study
17/76
4
I. 61% of Contractors believe that BIM is good for their Company.
II. Many architects see BIM has been helpful in improving their businesses.
III. Every 4 Clients out of 10 have reported that BIM has been productive for their projects
IV. Furthermore, it has been found, that expert users are:
V. More than three times likely to claim that BIM has resulted in improved efficiency for
their internal activities (Dobson, 2004).
VI. More than Four times likely to claim that BIM has resulted in improved efficiency for
their peripheral activities (Dobson, 2004).
The ability of a user to perform data analysis and extract information comes with skill and
experience in using BIM tools. More experts are shown to use BIM tools for quantity takeoff of
materials, scheduling of activities and cost estimation of the project as compared to beginners.
1.3
ADVANTAGES AND EDUCATIONAL OUTCOMES
Building Information Modeling will be the lightening beacon in the future construction industry.
The advantages of BIM are numerous as it covered every field of the construction from concept
to conclusion. It has made a lot of complexities simple and has lightened the burden of drafting,
documentation etc. The software evolution and new technologies in construction has been a very
helpful tool in promoting BIM (Young, Jones, & Bernstein, 2008).
Following are more useful benefits of BIM as discussed in Building Information Modeling byMcGraw Hill construction (Young et al., 2008):
1.3.1 Improved Designs
Building proposals can be analyzed on basis of cost and quality comparison, design efficiency as
well as real time simulations can be performed. Further changes can be made to the already
chalked out plans to improve performance and create a better design for the building.
1.3.2 Life Cycle Asset Management
Life cycle of a building is defined as the life of a building from its conception to its construction,
maintenance and finally demolition. Building Information models provide the necessary
Building information codes to help the user in different activities related to the life cycle of the
facility.
8/9/2019 BIM- Pakistan case study
18/76
5
1.3.3 Improved Visualization
BIM produces models that are far superior in quality as well as in the quantity of data stored in
them. For students and clients, BIM is an excellent starting point in helping visualize the
physical features and characteristics of a project. This makes communicating the complex
aspects of the building design to the new user very easy.
1.3.4 Less Wastage
BIM facilitate in calculating the precise amount of material quantity from the model through
quantity takeoff so that neither an excessive order is placed for the materials nor is there any
storage problem caused on the project site. The schedule also provides the user with an idea of
when the equipments and materials should be brought on site to avoid any delays and also
minimize the chance of any damage caused to the materials due to weather or other factors. This
in turn results in less material wastage as well as efficient use of labor force and equipment.
1.3.5 Reduced Safety Requirements
Many special features of BIM make the facilities more hazard proof such as a process known as
Fire Protection Modeling. This process ensures that the design can be re evaluated for public
safety and the best possible steps can be taken in order to make the facility more safe for theoccupants in case of a fire breakout. Safety risks can also be evaluated before the construction
phase even begins. The project manager is free to review the project complex tasks and activities
beforehand in order to reduce the risks for any potential injury or damage.
1.3.6 Guidelines for Students
The projects being done on BIM will provide a guideline to newcomers. If you want to
understand today, you have to search yesterday (Pearl S. Buck). Newcomers need not to face allthe problems that are currently being faced. The guideline will include the daily life construction
processes etc.
8/9/2019 BIM- Pakistan case study
19/76
6
1.3.7 Personal and Social Advantage
The projects on BIM will be an exposure to the latest technology being used in modern
construction industry. This would help the students to work on more productive disciplines rather
than textbook disciplines which would pave way for new construction era.
1.3.8 Forensic Analysis
Forensic analysis is the science of analyzing the results obtained after investigating a happened
incident and then documenting the causes based on evidences. Forensic analysis can be
facilitated significantly using building information modeling as BIM graphically visualizes the
potential damages, leaks and evacuation plans (S. Azhar, Hein, & Sketo, 2008).
1.3.9
Facility Management
Facility management is the vast field which includes the coordination of buildings, office blocks,
schools, shopping centers, hotels and hospitals in a way to achieve maximum efficient system.
BIM in this field is used for the operations of renovation, space planning and maintenance (S.
Azhar et al., 2008).
1.4 AREAS OF APPLICATION
Almost every area of construction industry is covered by BIM. Its influence is on every fieldincluding the design phase, construction phase and management phase. It provides a platform for
the digitized construction which would be very useful in reducing change orders and schedule
delays. Areas of application of BIM can be seen from the figure 1.2. The results of this project
can be applied for:
1.4.1 Improved Communication:
BIM can greatly improve the cross department communication as well as between different
parties like clients, financers etc that are attached to the project and helps to remove any
confusions held by the parties. One of the main reasons why project managers and contractors
prefer to use BIM over other 3D software is that the 3D model obtained through BIM is a much
realistic conception and therefore helps the client in deciding what kind of a facility they want to
build.
8/9/2019 BIM- Pakistan case study
20/76
7
1.4.2 Shop Drawings
BIM helps in generating high quality shop drawings for various building systems and features.
The shop drawing produced for the building can be anything from a detailed isometric image of
the Plumbing lines in the facility to the site layout. An example is that once the building model
design is complete; one can easily produce the MEP (Mechanical, Electrical and Plumbing) shop
drawings. These shop drawings can be used by the contractors to visualize different components
of the building.
1.4.3 Cost Estimation
BIM Software often includes a very useful cost estimation feature. The quantity of all the
materials used the facility are estimated by the estimation tool and costs are calculated based on a
set standard of prices for each material. The software calculates the costs for all materials andadds them up in the end to give the total cost estimate. The number of labors and their working
hours can be used to calculate the total estimate of the project.
1.4.4 Project Scheduling
Project scheduling tool allows the user to link up different sets of activities with the
corresponding elements in the BIM model. By linking these activities, the user is able to obtain a
bar chart of the project schedule which helps the project managers to find out any conflicts
between different activities and plan a clash free schedule. By comparing the planned and real
schedules, the project manager is able to better plan the course and speed of activities.BIM also
provides the construction project simulation which aids in visualizing the actual construction
project.
1.4.5 Conflict, Interference and Collision Detection
BIM models are made in 3-D space so every single object created is visually accessible.
Therefore any clash and interference among pipes, beams, columns and electrical wiring can
easily be detected (Jimnez, Thomas, & Torras, 2001).
These detections help in saving a lot of time and money. This is possible when there are reduced
numbers of change orders and the clashes can be easily visualized.
8/9/2019 BIM- Pakistan case study
21/76
8
All the applications of BIM can be seen in figure 1.2
Figure 1.2 Areas of application of BIM (Dispenza, 2010).
8/9/2019 BIM- Pakistan case study
22/76
9
LITERATURE REVIEW
2.1 BACKGROUND
The development of the country is very much influenced by the advancement in its constructionindustry. There is a dire need of infrastructure and buildings in every underdeveloped country in
order to pave way for the economic growth of the country.Building construction progress has
been hampered by the economic losses and decreased labor productivity. The economic losses
were caused by the defects in the design due to which the prefabricated components of the
building are not suitable thus the whole component has to be replaced when there is a design
failure such as constructability issues during the construction.
In 1974 Chuck Eastman and five other authors presented a paper in which they explained the
chief means of communication used in building design and construction processes which were
drawings, including notes and specifications. They mentioned few problems which were
i. In 2D drawings at least two drawings are required for understanding the structure thus
one dimension is shown twice. 2D drawings also become redundant as different items are
shown in two different drawings at different scale. All this means if a change is to be
done in any drawing it has to be changed in all drawings.
ii. Large efforts are required to keep the design up-to-date. But even with all this hard work
there is a possibility that information somewhere is obsolete and non-consistent.iii. For analysis of construction, information has to be taken manually from drawings which
is laborious work
They also suggested a solution, that is to create a computer system that could save and control
design information at great detail. This was named as building description system (Eastman et
al., 2008).
The solution to the above mentioned problems is BIM and it plays an important role in
developing a proper model of a building which represents every aspect and runs the analysis of
the building.
2.2
BUILDING INFORMATION MODELING
The construction industry has been facing a dramatic change to (I) increase; efficiency,
productivity, infrastructure value, quality and sustainability, (ii) reduce; lifecycle costs, lead
Chapter 2
8/9/2019 BIM- Pakistan case study
23/76
10
times and duplications, via effective collaboration and communication of stakeholders. Digital
construction seeks to integrate processes throughout the entire lifecycle by utilizing building
information modeling (BIM) systems as it can be seen in figure 2.1 (S. Azhar et al., 2008).
Figure 2.1 Fully Functional BIM (Jimnez et al., 2001).
BIM stands for building information modeling. It is anew and revolutionary approach for the
designing, construction and management of buildings.BIM is viewed in this proposal according to the following definition of BIM. According to the
White paper published by Autodesk BIM is defined as:-
Building information modeling is an approach to building design, construction, and
management. It supports the continuous and immediate availability of project design scope,
schedule, and cost information that is high quality, reliable, integrated, and fully coordinated.
Though it is not itself a technology, it is supported to varying degrees by different technologies
(autodesk, 2003).
The main function of BIM is to create a 3-D model in digital form which depicts the real life
environments .It provides the features to run the maintenance program after the completion of
the building. In order to have maximum control over the project there is a need of different
models including Architectural, Structural, MEP, resource management and others including a
8/9/2019 BIM- Pakistan case study
24/76
11
detailed schedule. So, BIM is referred to a combined model where models from different
disciplines are merged (Lahdou & Zetterman, 2011).
The purpose of the building construction is achieved when the building is functional. Building is
functional when purpose of the facility completely or partly serves. Thus, BIM is a digital
depiction of physical and functional characteristics of a facility. It is a shared information
resource about a facility forming consistent basis for decisions during its life-cycle (NBIMS,
2007).
BIM provides the focal point for the project stakeholders. All the data required by any type of
stakeholder will be available through BIM. The project location and the environmental impact on
the project is a new feature of BIM. The building location provides the information about the
impact of natural surroundings, temperature and effect of sunlight. So, building information
model describe the geometry, geographic information spatial relationships, quantities andcharacteristics of building elements, material inventories, cost estimates and schedule of
performance. This model can be used to express the entire building life cycle (Bazjanac, 2006).
2.3 TECHNICAL ASPECTS OF BIM
Different BIM functions are explained which are attached to each BIM level support.
2.3.1 Clash Controls
BIM model of different disciplines can be checked at same moment for any type of geometrical
design errors. Those areas where these models overlap each other when they are brought together
can easily be altered and can be made error free(Eastman et al., 2008).
To perform clash controls in BIM Autodesk provides a tool named Autodesk Navisworks. The
reports can be generated to identify these clashes and there affects on the structure. The
alternatives are also suggested in order to get out of these critical situations with relative ease.
Controlling clashes helps in minimizing change orders and redesigns (Eastman et al., 2008).
This feature has been very effective as it identifies clashes before construction unlike the manualdrafting where the clashes were identified during the construction which caused costly delays
and the projects could not be completed within budget. Clash detection feature is shown in
figure 2.2.
8/9/2019 BIM- Pakistan case study
25/76
12
Figure 2.2 Clash detection
2.3.2 Analyses
Analyses on energy usage can be done by synchronizing a BIM model to those tools which
determine the isolating ability of a structure and it can analyze total usage for heating and
cooling for that structure in extreme conditions. This makes the structure more energy efficient
and cost economical. (Eastman et al., 2008).
2.3.3
Time Estimation (4D)
The time estimation tool, more commonly known as 4D, links the objects present in the
information of a building with plan of time. This link then helps in visualizing the projects
schedule. Moreover, it can be used by users to simulate the building location and construction at
random time frames. Such project modeling provides important data and helps the user in
foreseeing errors which rear their ugly head later on creating a problem for the user. Autodesk
provide the perfect platform to provide this feature in Autodesk Navisworks. The simulation of
construction in real world is run in this tool which makes it easy to communicate and sequence
different activities .Schedule from Primavera can be imported into the project (Eastman et al.,
2008).
Clash betweenpipes
8/9/2019 BIM- Pakistan case study
26/76
13
2.3.4 Cost Estimation (5D)
The cost estimation tool (also known as 5D) allows all the elements in the 3D design to be
connected with a set price list for all the materials. Although, price lists are mostly based on the
volume cost of materials but it can also include the cost of the laborers and equipment cost. This
provides the user with a more detailed cost estimate of the project. Such as detailed cost estimate
in the early design phases creates a better understanding of the financial implications in terms of
design changes and therefore, decisions regarding materials and construction can be evaluated
from an economical standpoint. Autodesk provide this feature in Autodesk Quantity Takeoff
(Eastman et al., 2008).
2.4
BIM LEVELS
The capability maturity model (CMM), which was developed by NIBMS, defined the
organizational level of a model and provided the users with an opportunity to evaluate their
procedures based on a wider array of technical objectives.
The basic aim of using CMM is to create a tool for calculating the level of maturity in a building
information model by analyzing it against an established criterion and provide that information
to the project stakeholders. The term maturity depicts that to which extent the features of BIM
are implemented. On the horizontal axis of the matrix there are eleven spheres of concern, for
example: data richness, life-cycle views and roles or disciplines. The vertical axis on the otherhand contains ten levels of maturity. Ten is considered to be the greatest level of maturity from
the Appendix-1.
Different communities form their own criteria to calculate the level of maturity regarding the
utilization of BIM. The maturity regarding utilization of BIM in Ramboll is described by levels
ranging from 0 to 3, where 0 is the lowest and 3 is the highest level of progression. The parts of
BIM which are included in BIM levels are specified. What parts of BIM which are included in
each BIM level is specified. This proves to be the driving force behind the task managers to
progress to next BIM level which makes the projects successful. The task mangers can expedite
their projects for some monetary advantages by moving up to next BIM levels. Utilization of
BIM is very effective for most of the communities so most communities tend rate their success
on the basis of BIM levels (Teicholz, 2004).
8/9/2019 BIM- Pakistan case study
27/76
14
BIM levels are as follows:
2.4.1 Level 0Usage of BIM Software
During this level 3D model is only used in the design phase and there is no coordinated
integration with other parametric models or fulfils requirements regarding documenting of all
information exchange that takes place i.e. the concept of 5D model is not implemented (S. Azhar,
Carlton, Olsen, & Ahmad, 2011)
2.4.2 Level 13D Coordination
For BIM Level 1, a satisfactory level of coordination of functions between the different
disciplines (civil, electrical and mechanical disciplines and project hierarchy) is achieved. Clash
controls are performed as models of all the disciplines are integrated (S. Azhar et al., 2011)
At this level of BIM information flow within the project team is structured and identified tomake common goals which would be achieved later on which would help to achieve the main
objective of the project.
2.4.3 Level 2Analyzes, Time and Cost Estimation
At level 2 in BIM, level 1 and more additional BIM services which requires multi disciplinary
data input are provided. In this level certain services are available which include energy
analyzers and basic variant of time and cost estimation (S. Azhar et al., 2011).
In this level schedule development and cost estimation are performed with the inclusion of
effects due to the building orientation, water harvesting techniques due to which building water
consumption will be less and sustainable materials which helps in reduction of materials used.
Thus, paving way for energy efficient building (Hergunsel, 2011).
2.4.4 Level 3Integrated Model
At level 3, a simpleton model is not enough and further complex models are needed to operate.
Services from both level one and two are provided with an extremely well coordinated and
integrated model between many disciplines. This level integrates all the data including 5-D
model and energy analyzing data, This level needs high level of effort as data needs to be
updated periodically so that maintenance program can be run effectively (S. Azhar et al., 2011)
8/9/2019 BIM- Pakistan case study
28/76
15
2.5 TECHNOLOGIES IMPLEMENTED IN BIM
BIM is an approach not a technology so it does requires suitable technologies to implement
effectively. Figure 2.3 describe the comparison between different technologies. These
technologies are:
Figure 2.3 Comparison between different technologies (AGC, 2005)
2.5.1 CAD Technology
This technology supports drafting automation effectively but modern construction requires high
level of competence. Using this software can demand high level of effort by maintainingstandards such as layers and naming standards. This requires the user to be efficient, highly
skilled and disciplined, due to which high level programmers are required to do this job.
8/9/2019 BIM- Pakistan case study
29/76
16
2.5.2 Object CAD Technology:
It aims to replicate the building components in CAD drawing, by focusing on the 3D dimensions
and geometry of the building facility, the generation of documentation from that 3D drawing and
by extracting object data from the building components in order to be able to generate
information about object parameters and quantities. (AGC, 2005)
In object CAD the 3D geometry is used but this becomes really complex for larger projects as
more than one floors are made it also requires a lot discipline and care should be taken while
using this technology, not much liberty is provided to make plans with ease. As the manual
correction is required in CAD technology it also requires the same pattern to implement the
corrections.
2.5.3
Parametric Building Modeling
Parametric building modeling corresponds to the decision support system in the Financial
Community. This provides an integrated system that can be used to simulate the behavior of a
real-world system. These systems blend a Data model (geometry and lengths) with a Behavioral
model (change management). In this technology basically the building model is fully coordinated
throughout the model i.e. every building component is related to each other. If there is a change
in one component then the consequences of the change is applied throughout the related
components such as if the door height is to be altered then automatically the wall above it will be
altered accordingly. This provides the basic interrelated information which lessens the work
effort. Autodesk Revit is an efficient tool which provides the platform to implement this
technology (AGC, 2005).
2.6
BIM AND PROJECT MANAGERA
Can BIM be used for Project Management? How Project Managers are influenced by BIM?
These are some questions which arise in ones mind. But after the thorough study of literature it
was concluded that the benefits found in projects using BIM are more than the challenges,
moreover the benefits found are aligned with the function of a Project Manager.
The literature showed that there is a dire need for integration of Project teams and collaboration
of all parties.BIM could be used effectively for the integration of Project teams and collaboration
of all Parties. The Project can be performed in a combined manner to save Cost, time and to
8/9/2019 BIM- Pakistan case study
30/76
17
work within the scope. A survey was carried out to understand the influence of BIM on the role
of project manager and it states that 50% of the response showed that project manager should be
proficient in BIM and 24% response was that project manager should be in charge of BIM-
management. Many studies have shown that BIM is a tool that goes far beyond its designed
functions. Therefore, the Project Manager should always lead in BIM Management just like he
has to lead in all other departments of IT systems in Complex Projects. Although there are some
difficulties and challenges faced in the implementation phase of BIM technology but this can be
overcome by investing for the sufficient training of Staff in the use of BIM (Jimnez et al.,
2001).
Another challenge was the existence of certain Software related issues which did not allow the
unleashing of full potential of BIM. The research suggested that the PM must contribute towards
solving these issues rather than considering it as an excuse to not use BIM (Jimnez et al., 2001).But the main question arises how BIM can benefit the project manager. The task of the project
manager is to deliver a successful project. A successful project can be defined as the Project
delivered on time, within budget and within the scope.
BIM provides certain benefits which would help the project manager to deliver a successful
project, the benefits are:
2.6.1
Communication BenefitsThe communication between different stakeholders improves with the help of BIM. The main
reason behind it is the development of a 3-D model which is easy to understand unlike a 2-D
Model which has to be imagined to visualize it in reality and not enough information can be
included in such models.BIM allows for less costly and time consuming visualizations which are
impossible using traditional modeling. The clarity and depiction of real world model helps to
communicate with different stakeholders (Lahdou & Zetterman, 2011).
2.6.2
Quality Benefits
The quality of a project can be improved with the help of a 3-D model which helps all the
stakeholders involved to understand their roles and their objectives. The data need to be entered
once in the BIM unlike traditional models which makes cumbersome and complex computations.
The process of documentations is also improved. Reports can be generated in any format and can
include the required data. The clashes can be controlled in a Project as all the models are
8/9/2019 BIM- Pakistan case study
31/76
18
integrated in one model and clashes are detected and can be corrected. The model includes the
input of different stakeholders which provides s[specific information to the respective
stakeholders (Lahdou & Zetterman, 2011).
The benefits above can create mutual understanding between client and the project manager
because of the clear goals and objectives. This takes both client and the project manager on same
page. BIM utilized in design phase helps in creating schedules. This helps in calculating the
budget. BIM linked with time helps in planning the construction execution process .It provides
better control over the project. Cost estimates provides better control of economic aspects of
BIM and can optimize the value a client can obtain from the investment (Lahdou & Zetterman,
2011).
2.7
BIM AND CONSTRUCTION MANAGEMENT
There are three major areas of Construction Management which are as follows:
2.7.1 Design Phase
It is a duty of an architect to balance the scope, cost and schedule of the Project. If there are ill-
timed changes then it will adversely affect relations between client and the consultant. Using
BIM all the data is available straight away and in updated form so that project related decisionscan be taken swiftly and effectively.
BIM allows project team to make changes in designs during design phase without any
backbreaking and manual checking work because when there is a correction to be made in design
while not using BIM, the correction needs to be implemented to every related component
manually in order to make the design ready. The check and balance is also required to see if all
the related areas are corrected but in BIM the change is coordinated throughout the related
components and less time will be consumed. All the design and documentation work can be done
concurrently rather than one after the other.
BIM coordinates the change and its consequences made in the certain point of project throughout
the project lifecycle automatically. The design team can deliver the work faster. BIM eliminated
the coordination mistakes and improve the quality of work. The three different models are shown
in figure 2.4.
8/9/2019 BIM- Pakistan case study
32/76
19
Figure 2.4 BIM models
The four thorough Case Studies of BIM implementation for precast concrete design by mid-sized
structural engineering firms, reported by Kaner, Sacks, Kassian and Quitt revealed that the
designs were error free which improved the labor productivity with the help of BIM (Eastman et
al., 2008).
2.7.2 Construction Phase
BIM makes available concurrent information on Building quality, schedule and cost. Builder can
speed up quantification for estimation, production of updated estimates and construction
planning. The consequences of procured products can be studied using BIM by using a virtualconstruction tool of BIM which helps in locating the defects in the building before physical
construction is even started, so corrected procured products (e.g. prefabricated beams) can be
ordered and plans can be prepared quickly. BIM ensures less time and money is spent on process
and administration issues because of high document quality and better construction planning.
The digitized nature of BIM releases the complexity of manual documentation process by
automatic generation of reports.
In a large health care project due to BIM/VDC (software) there were zero-conflicts and 100%
prefabrication and maximum labor productivity with zero accident in the field. With 6 months
savings on schedule and $9 million on the cost (Eastman et al., 2008).
8/9/2019 BIM- Pakistan case study
33/76
20
2.7.3 Management Phase
BIM provides digital record of renovation and improve move planning and management. It
accelerates the adaption of standard building sample to site conditions for businesses. Physical
information about the building is also available such as financial data and furniture inventory etc.
Consistent access to this information improves both revenue and cost management in the
operation of the build.
2.8
ADVANTAGES OF BIM
Building information modeling supports the continuous and immediate availability of project,
design scope, schedule, and cost information that is high quality, reliable, integrated, and fully
coordinated (AGC, 2005).
The advantages are:
I. Better Coordination
II. High quality work
III. Low cost
IV. Time saving
V. High labor productivity
VI. Environmental Impact
VII. Safety provisionsVIII. Pre-fabrication
IX. Less work force
X. Less conflicts
XI. Visual aids
XII. Record Data
XIII. Maintenance Program
XIV. Less changes
A research at the Stanford University research center on BIM revealed that
i. Up to 40% elimination of unbudgeted change.
ii. Cost estimation accuracy 3%.
iii. 80% reduction in time taken for cost estimation
iv. 7% reduction in project time
8/9/2019 BIM- Pakistan case study
34/76
21
v. 10% clash detection which saves the budget.
In many projects millions of dollars have been save by using BIM. Time delays have been
provided. Designs have been corrected with the help of contractors services and BIM. This
all is done in a coordinated way so that no time is wasted correcting the remaining of the
project. Digital process helps in getting work done without a lot of manpower just few
technicians are required to operate this software. The figure 2.5 shows the acknowledgement
about BIM from the top eight construction companies in UK and USA.
Figure 2.5 Benefits of BIM (Yan & Damian, 2008)
2.9
BIM IMPLEMENTATION IN REAL LIFE
Some of the examples of implementation of BIM in real life are:
2.9.1 Melbourne Stadium
Studies have shown that use of BIM on Projects has resulted in a 500% return on investment,
while the use of Bentley structural for scheduling and documenting yielded only a 200%
return. Final optimization results through BIM have shown a 10% savings in roof tonnage in the
steel members with an ideal roof profile.
This was possible only due to the optimization studies (time and money saving designs) and the
function of BIM to compare different structures which proved helpful in eliminating the errors.
8/9/2019 BIM- Pakistan case study
35/76
22
2.9.2 Water Treatment Plant-Walsh Group
Using Bentley Structures 20 conflicts in the design and construction phase were discovered. This
helped the organization to save $90,000 and 7 weeks of delay due to the comprehensive 3D
model of BIM which was easy to understand and revealed minor details which were very
effective as a truss was designed incorrectly as it was overlapping a steel beam by 6-inches.
2.9.3 Krakow Stadium
Generative component is an efficient BIM tool provided Bentley systems. A highly complex
spiral structure was designed for the stadium within little amount of time and avoided time
delays with the ability of BIM software Generative components to design complex geometry
without reworking the documentation process allowed them analyze different spiral geometric
structures as shown in figure 2.6.
Figure 2. 6 Krakow Stadium complex spiral structure
8/9/2019 BIM- Pakistan case study
36/76
8/9/2019 BIM- Pakistan case study
37/76
24
The tools used in the current project are Autodesk Revit, Autodesk quantity takeoff, Autodesk
Navisworks and Autodesk Green building studio. These software are user friendly and are easily
accessible. The tools used in this project are:
2.10.1 Autodesk Quantity Takeoff
Autodesk quantity takeoff helps to calculate and estimate materials more swiftly, accurately and
easily. Cost estimators can create synchronized, comprehensive project views that combine
important information from building information modeling (BIM) tools such as Revit
Architecture, Revit Structure, and Revit MEP with images geometry and data from other tools.
It can also calculate areas and count the building components manually or automatically and can
export them to Excel and to create DWF format.
i. Take-off in minutes automaticallyPerform a take-off on an entire building
information model (BIM) in just minutes through integration of 2D and 3D design data.
ii. Greater flexibility than typical databases or spread sheetsPerform interactive
examination of 3D models for material cost estimating purposes.
iii. Dynamic countingCount and quantify design data quickly and easily.
iv. More efficient manual take-offsupports the take-off of JPG, TIF, PDF, and other no
intelligent image formats.
v. Share, query, and clarifyGenerate quantities linked to specific objects. Mark up and
round-trip your comments.
vi. Faster and more insightful quantity reportsCreate summaries and detailed quantity
surveying reports quickly and easily.
2.10.2 Autodesk Revit
Revit software is specifically developed for building information modeling (BIM), enabling
design and construction professionals to take ideas from concept to construction with
coordinated and consistent model-based approach. Revit is single software that includes features
for architectural design, MEP and structural engineering. Its model can be imported into other
BIM tools in order to perform other BIM functions such as clash detection, energy analysis and
scheduling etc.
8/9/2019 BIM- Pakistan case study
38/76
25
Some of the features of REVIT are:
i. Bidirectional associabilityany change in one aspect of a model is reflected throughout
the model.
ii. Parametric componentsit uses intelligent building components to improve design
accuracy.
iii. BIM platformprovides a platform for building information modeling by exporting the
model to other tools to perform other functions.
iv. Realistic Modelthe 3D model obtained depicts the realistic model with an ability to be
edited.
v. Flexibilitythe software provides an environment where every designer can work
including an Architect, MEE and structural designer.
vi. Work sharingprovides an environment where a single Project model can be accessedby different users and changes can be made in
certain areas by the respective users. .
vii. Energy Analysissupport sustainable design decision making.
viii. Improved schedulesSchedule enhancements with Parameters, Filter & Grand Totals.
2.10.3 Autodesk Green Building Studio
It is energy analysis software which helps designers and architects to perform energy analysis,
optimize energy consumptions and work toward carbon neutral building designs during the early
processes of the construction project. It is cloud based software. The concept of Green building
can be achieved through this software as it allows analyzing buildings and provides the
alternative materials to develop a sustainable model. Some of its features are:
I. Building energy analyseswhole building energy analyses calculates total energy use
and carbon emission of a building on annual, monthly and daily basis using global
database of weather information
II. Weather Datait gives user the access to numerous weather stations which arecompiled from many trusted sources.
III. Water usageestimates water usage inside and outside of the building.
IV. Solar radiationvisualizes incident solar radiation on window surfaces over any period.
V. Day lightingReceive qualification for LEED day lighting credit.
8/9/2019 BIM- Pakistan case study
39/76
26
VI. Shadows and reflectiongives the shadows and reflection data with respect to sun
path.
2.10.4 Autodesk Navisworks
Navisworks features enable coordination, construction simulation, and project analysis for
integrated project review. It provides users advanced tools to simulate scheduling and perform
clash detection. It enables coordination, construction simulation and project analysis for
integrated projects.
I. Clash detection and interference checkingforesee and avoid possible clash and
interference problems before construction, reducing change orders and delays.
II. Model file and data aggregationModel publishing and data and model aggregation
tools enable user to integrate design and construction data into a single integrated model.III. 5D project scheduling includes time and costSimulate construction project
scheduling in 5D to visually analyze project activities and reduce delays and sequencing
problems regarding the project.
IV. Photorealistic model renderingUse photorealistic model rendering capabilities to
develop animations in 3D and images.
8/9/2019 BIM- Pakistan case study
40/76
27
METHODOLOGY
In order to meet the pre-defined objective, this chapter presents the research methodology
adopted. The sequence by which this particular project will be progressed is presented in a flowdiagram shown below:
Figure 3.1 Flow Chart of the research methodology
Chapter 3
8/9/2019 BIM- Pakistan case study
41/76
28
The steps followed are explained below:-
3.1
SELECTION OF THE TOPIC
In order to carry out the project BIM was selected as BIM provides the modern tools for
construction and allows the user to maintain the focus on other important issues.
3.2
LITERATURE STUDY
In previous chapter some important terminologies were mentioned and discussed which proved
helpful in studying BIM and its uses including better visual effects, prefabrication, project
planning and management and cost control. Literature study was facilitated by attending lectures
and presentation more over official website of Autodesk and thesis were studied, case studies
including Krakow stadium, Marina bay front pedestrian bridge, Melbourne Stadium and research
books related to BIM were consulted. This helped to understand and gain the required
information about BIM.
3.3
SITE SELECTION
Literature study and site selection were performed simultaneously. For the quest of building site
different buildings were visited in Islamabad including MARI Petroleum Ltd. (G-10), State Life
Tower (Blue Area), Grand Hyatt Hotel (Constitution Avenue) and OEC Tower, (G-9/4). OECTower G-9/4, Islamabad was a suitable site and feasible in all aspects. Thus, with the aid
National University of Science and Technology and PRIMACO officials the building was
formally selected.
3.4 DATA COLLECTION
Data collection and understanding is very important in order to process the data into very useful
in information. Thus, Architectural drawings were provided by the site officials to kick start theproject and with the passage of time structural and MEP drawings were provided as per
requirements. But data collection requires some official permits to share some confidential data.
But still there are some aspects of data which are left to be desired.
8/9/2019 BIM- Pakistan case study
42/76
29
3.5 LEARNING SOFTWARE
The Project progress depends on a certain tool. Thus, Autodesk Revit , Autodesk Quantity
Takeoff, Autodesk Navisworks and Autodesk Green Building Studio were selected tools for
modeling, material take off, scheduling and energy analysis respectively. The reasons behind
selecting these tools were there availability and special access for students to these tools with the
help of student licenses. Different tutorials were used for the process of learning. The main
sources for these tutorials were youtube.com, Lynda.com, Autodesk and NUST provided certain
resources to learn the software.
3.6
3-D MODELING
3-D modeling can only be performed when the user is familiar with the software. A 3D model is
a three dimensional model of three different disciplines of construction i.e. Architecture,
Structure, MEP (Mechanical, Electrical and Plumbing). Modeling of these three different models
was done separately and with the feature of Revit 2013 these three models were linked together.
Using copy monitor feature these three models were coordinated. Architectural model consists of
basic walls, flooring, finishes openings doors and other architecture components. This model was
made with the aid of architectural template available in the internet. The different views of the
model can be seen in the Appendix section.
Structure model consist of beams, columns, reinforced walls and structural items.Reinforcements were given to the framing components and structural analysis was performed in
order to verify the design.
MEP model consist of fittings, fixtures, HVAC, electrical and mechanical components which
aided for mechanical purposes. A general integrated 3D model can be seen in the figure given
below. Plumbing model consists of fire pipes, water pipes, joints, water sprinklers, bends and
drainage pipes etc. The HVAC consist of ventilation system of the building and cooling and
heating systems of the building with temperature sensors. Electrical systems include electrical
wiring, lighting fixtures and sockets etc.
All these models were created with a help of manual 2D drawings. A general integrated model is
shown in figure 3.2.
8/9/2019 BIM- Pakistan case study
43/76
30
Figure 3.2 Integrated model
3.7 CONSTRUCTION PROCESS SIMULATION
Scheduling is important in order to take note of the time. Autodesk Navisworks Manage was
used for scheduling purpose. The integrated 3-D model was exported from Autodesk Revit in a
NWC format. The model NWC format file was imported into Autodesk Navisworks Manage.
The schedule was imported from Primavera P6 into the model in Navisworks. The activities and
building components were linked together to create a simulation using a tool called timeliner.
Different project elements were assigned the related activities to form a simulated schedule. The
construction process could be visualized over the span of time.
3.8 QUANTITY TAKEOFF
Much BIM software have integrated Cost estimation tools which can easily extract material
quantities from the BIM 3-D Model and then use the unit price method to calculate the total cost
of all materials.By using the cost estimation tool in BIM construction materials, equipment and labor force
needed for work can be co-related with the resources available on the project. For example, for
laying the foundation, a concrete Mixer is required, several skilled labors as well as many
reinforcement bars and bags of concrete, along with the usual concrete checks and safety
8/9/2019 BIM- Pakistan case study
44/76
31
precautions needed on the sight etc. BIM can be used to breakdown each work package into
smaller units and analyze step by step all the related tasks. This helps the user to optimize the
work flow and the quantity of equipment, materials and labor needed for each task such as
number of laborers needed for a specific task, which in turn results in greater optimization of the
entire construction phase.
There are two main fundamentals of cost estimation in BIM, one is pricing and the other is
quantity takeoff. The quantity takeoff tool analyzes the 3D BIM model and extracts the
quantities of all the materials into a database such as a MS Excel file. A cost estimator needs to
have extensive estimation skills and knowledge in order to extract accurate information from the
model, even to the point of breaking down of an activity into several components in order to get
a better estimation.
Once the estimations are extracted from the model, the estimator has to input the unit prices ofall different materials, labor hours etc. In this way, the estimation tool can multiply the estimated
quantities with the unit prices to produce a highly accurate cost of the project.
The other tool used efficiently in BIM is Autodesk Quantity Takeoff. This tool performs the
quantity takeoff directly from the 3-D model made in compatible modeling tool. The cost, labor
hours and productivity are calculated with the factors added into the software. The working of
Autodesk quantity estimation can be seen from the figure 3.3:
Figure 3.3 Quantity Takeoff working
8/9/2019 BIM- Pakistan case study
45/76
32
3.9 CLASH DETECTION
Every Project has design issues. The main design issue is the clash of designs of different
disciplines e.g. clash between MEP and structure design. These issues can be costly as they cause
delays and costly change orders. The main reason behind these clashes is the lack of coordination
between personnel of different disciplines.BIM provides certain tools to minimize these clashes
in the design phase. But still a lot has been left to be desired. So another feature BIM provides to
identify clashes between different disciplines after the designs have been completed. Thus
Autodesk Navisworks was used in this project to identify clashes. Models form different
disciplines were imported into Navisworks and process was run in order to identify clashes. The
reports of the clashes detected were generated which could be useful to send to other
stakeholders to make changes to their design respectively.
3.10
ENERGY ANALYSIS
Nowadays a lot of emphasis is laid on sustainable design and green building. In order to run the
energy analysis of the project Autodesk Green building studio was used. The integrated 3-D
model was imported in to the software. The location of the building was entered, data period was
entered and the energy results were obtained. The heating and cooling loads were identified. The
shadow data, water usage and carbon emission data was resulted.
3.11
ANALYSIS
By the end of estimating costs, the aim of having 5D model was achieved. At that stage there
was a requirement of checking all the work that was done so far so that errors and omissions
could be traced and eliminated. In final review the data obtained from models was checked. The
data obtained from the 5-D model was then compared to original site data which yielded the
impact of BIM on a certain facility.
3.12
CONCLUSION
After analyzing the project it was crystal clear impact of BIM in managing the project and then
the conclusions were drawn about the methods that could be deployed for having a better
management and control over the project.
8/9/2019 BIM- Pakistan case study
46/76
33
3.13 PREPARING REPORT AND PRESENTAION
The final phase of the project included:
3.13.1 5D Model Submission
5D Model of the building was submitted in form of softcopy.
3.13.2 Preparation of Presentation
Presentation for the final defense was prepared and the project was presented and demonstrated.
8/9/2019 BIM- Pakistan case study
47/76
34
CASE STUDY
4.1
PROJECT INTRODUCTION
All phases of BIM are to be implemented in the Government Project of Employees Old age
Benefit Institution (EOBI) in G-9/4 sector, Islamabad named as Overseas Employees
Corporation (OEC) Tower. The total
covered area of the project is 190,000 square
feet. The plot size of the project is 120 X
300. Floor area ratio of the building is 1:3.
The build floors consist of two basements,
one ground floor and nine floors. Builders
Associates is the firm contracted to build the
project. This was designed by Sohail A.
Khan Associates (SAKA). Pakistan Real
Estate Investment & Management Company
(PRIMACO) is a firm which represents theclient (EOBI) and handles the queries
regarding construction. The MEP
consultants of the projects are Fahim, Nanji
and desouza pvt. Ltd. The project was
started in April, 2012 and was to be
completed by November, 2013.But due to
some reasons the project was not completed
at the targeted date but the latest date proposed for its completion is 20 November, 2014. The
detail about the stakeholders can be extracted from table 4.1.
Chapter 4
Figure 4.1 OEC Tower South East Artistic view
8/9/2019 BIM- Pakistan case study
48/76
35
Stakeholder Role Information
EOBI Client www.eobi.gov.pk
PRIMACO Construction Manager www.primaco.com
SAKA Consultant saka.net.pk
Builders Associates Contractor www.buildersltd.com
Fahim, Nanji & desouza Pvt.
Ltd.MEP consultant www.fnd.com.pk
Table 4.1 Project stakeholders
The site can be seen from the following figure 4.2 and figure 4.3.
Figure 4.2 OEC Tower North West view
8/9/2019 BIM- Pakistan case study
49/76
36
Figure 4.3 OEC Tower under construction
4.2
SPECIAL FEATURES OF OEC TOWERA few distinct and sustainable features of the building which make it different from other
building are:
Vertical Plantations
Solar Panels at the roof
Rain water storage and harvesting
Re-use of building waste water for external irrigation
Drip irrigation Impulse Ventilation system for car park area
Smoke management system
Water based Fire Suppression system including fire sprinkler system
Dedicated fire water storage to provide 60 minutes of fire suppression capability
Supervision and Monitoring of fire suppression system at fire alarm panel
Waste Management system
Emergency exit tunnel Storm water drainage system for roof and plot.
8/9/2019 BIM- Pakistan case study
50/76
37
4.3 AREA OF OEC TOWER
Initially at the time of tender, in June 2011, the project was supposed to be a 10+3 story building.
Consisting of 10 floors of office building and below it had to be 3 basements for parking
facilities etc. at that time the total covered area was estimated to be 220,000 sft. But due to lack
of funds, the scope of project was changed and a basement was removed from the scope of
project leaving behind 190,000 sft covered area divided upon a 10+2 story building.
Areas of the floor can be seen from table 4.2.
AREAS OF OEC TOWER
AREA DESCRIPTION DIMENSIONS (Ft) APPROX. AREA
TOTAL PLOT AREA 120X300 36,000 sft
BUILT UP AREA-
(Covered area of building & lawns etc)200,000 sft
COVERED AREA-
(Building area)190,000 sft
Table 4.2 Areas of OEC Tower
4.4 3-D MODEL
Project yielded a 3-D Model of a Building facility. Using conventional methods, architects are
only able to draw a Two-Dimensional Model of the facility whether by Manual Drafting or by
using AutoCAD. The end product i.e. the integrated 3D model of the building was of the exact
same dimensions and features. Autodesk Revit was used for this task. Models from different
disciplines were integrated to develop an integrated 3-D model. The integrated model was used
for material takeoff which was used in estimating costs. The clashes between different models
were also detected. So the integrated 3-D model was essential for other features of BIM. The
integrated 3-D model consisted of following models:
4.4.1 Architectural Model
During the project the architectural model was developed initially. In the process of developing
of architectural model different components of the building were involved including walls,
8/9/2019 BIM- Pakistan case study
51/76
38
floors, stairs, roof, elevators, openings, doors, columns and curtain wall etc. The 3-D views, plan
views, section views, the elevations and legends of the architecture model can be seen in
appendix-2, the components involved in the model are as follows:
4.4.1.1Grids
First of all the grids were drawn in order to provide reference to other building components. The
vertical grids were given the notation in the form of numbers whereas the horizontal grids were
given the notation in the form of alphabets. The same grid was used for other building models.
4.4.1.2Levels
The levels were drawn in the model after the drafting of grids. Levels depict the elevations of
different building floors. Every level was given a specific elevation as provided in the buildingdrawings. The levels were handful