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This course develops the necessary competence and knowledge toproduce drawings for the detailing of structural steel elements of
construction in accordance with the requirements of relevant AustralianStandards and codes and industry benchmarks.
Such that at the completion of this course you will be able to:
1. Read, interpret and extract relevant information from the structuralsteel project specifications.
1.1 Project specifications are correctly interpreted to determine the
requirements for the structural steel with respect to materials,workmanship, welding, corrosion control and bolting.1.2 Relevant information is extracted from the specification andapplied to the design drawings.1.3 The compliance standards applicable to the project and cited inthe specification are understood and applied to the designdrawings.
2. Interpret and apply relevant codes.2.1 AS 4100 is interpreted accurately to determine correct bolt hole
edge distances, fabrication tolerances and erection procedures.2.2 AS are interpreted accurately and correctly with respect tostructural steel connections.
3. Draw structural steel line3.1 Structural steel line diagrams are drawn in plan, section anddiagrams elevation.
4. Produce design drawings of various structural components inaccordance with the design specifications.
4.1 Relevant data is extracted from relevant standards.4.2 Design drawings of various structural steel components areprepared in accordance with the design specifications and to AS1100.501.4.4 Line diagrams, plans and elevations, details and sections arecorrectly labelled using an appropriate member marking system.4.5 Member schedules are included and are complete and withcorrect designations.
5. Apply knowledge of weld types and requirements for field and site
5.1 The terminology for various types and elements of welds canbe correctly used.5.2 Welding specifications are correctly applied to weldedconnection design features.
6. Specify appropriate protective coatings6.1 The method for selecting and specifying protective coating isunderstood and applied as required.6.2 The appropriate protective coating is selected and specified onthe drawing.
7. Detail bolted connections.7.1 The differences between commercial and high strength bolts isunderstood and applied as required.7.2 The tightening procedures for both commercial and highstrength bolts is understood and used to inform draftingdecisions.7.3 Bolting procedure designation is correctly applied to structuraldesign drawings.7.4 Bolted connections are correctly detailed.7.5 The Bolt schedule is included and is complete.
8. Consider other design and drafting disciplines involved in astructural design project.
8.1 The types of design and drafting activities that make up amajor structural design project is understood and used to informpersonal work practices.8.2 The interaction required between disciplines to ensure that allaspects of the project are considered prior to commencing detaileddrafting is understood and used to inform personal workpractices.8.3 Drawings from other major disciplines involved in a majordesign project which need to be interpreted in order to avoidunnecessary construction clashes is understood and used toinform personal work practices.
Drafting in its broad sense involves the depiction of “items” of somesort so that the “item” can be constructed, commercially manufacturedor simply created. Since these depictions or drawings are usuallydistributed on paper hard copy, we can only portray in twodimensional drawings. Therefore drafting generally involves theportrayal of three dimensional objects into two dimensional drawings.
Structural steel design layout and/or detail drawings must clearlyshow:
• the nominal loading, fire resistance and corrosion protectionrequirements
• steel grades, sizes and member designations
• number, size and categories of bolts and welds (including
testing if required)
• connection details, joint and splice details
• member camber and any construction or fabrication constraints.
Each drawing needs to provide all the information necessary for theconstruction of the steel work and to ensure clarity, should omitirrelevant details.
Drawing, section and detail references should be given to linkeddrawings for individual details or associations with other componentsand any included schedules.
Written descriptions on drawings need to be clear and concise. Anyspecial requirements relating to construction details should be noted orreferenced on the drawing to enable inclusion in construction.
Overall clarity of detailing and dimensioning is essential and alwaysremember:
Topic 1 - Design Layout Drawings – Plans,Elevations and Sections
Learning outcomesUpon the successful completion of this topic, you will be able to:
• Read, interpret and extract relevant information from thestructural steel project specifications. [LO1]
• Interpret and apply relevant codes. . [LO2]
• Draw structural steel line. [LO3]
Introduction to topicStructural steel design drawings are required to provide the necessarydimensioned setout of all the structural component of the work. Thefull set of contract documents produced for construction may or maynot include a set of fully dimensioned architectural drawings.
If included, the architectural drawings will show fully dimensioneddetails and all applied finishes that are required for the completedconstruction. It is normal practice that the architectural drawings willalso show all the structural component dimensions as well, however the
structural steel design drawings will always specify the structuraldesign member sizes.
Design layout drawings are required to provide all the informationnecessary for the construction of the work shown and should omitirrelevant non-structural details. Information to be shown on thedrawings shall include any required design information and such itemsas are specified in the respective structural design codes, or asinstructed by the designer.
References should be given to associated drawings for particular details
or for showing the relationship with other components, and toschedules.
The design of any structure is a progressive process, very often thestructural outlines and profile sizes will be known well in advance ofthe finer details of specific connections. The design layout drawingswill be issued early in the documentation of a project so that all otherdisciplines can coordinate their work. The design layout drawings arealso used to assist the design engineer to complete design and sketchingof final detail requirements.
Structural steel framing members are generally much more slender thanthe outline profiles of concrete members used in reinforced concreteconstruction. Whereas reinforced concrete plans and elevationdrawings show the concrete outline and then proceed to detail specificreinforcement, because the structural steel members are much finer,steel drawings show members as line diagrams which are thendeveloped to show enlarged scale connection details.
Activity 1A Read text
1. Refer to AS 4100 and read Section 1
2. Refer to AS 1100.501 and read Section 1
A typical steel building structure will incorporate columns, beams,
bracing, wall and roof cladding support members and possibly a rangeof combinations of other structural configurations.
Therefore in a standard set of structural steel construction designdrawings, their will be drawings of each of these components showingall their design requirements.
Activity 1B Read text
1. Refer to AS 1100.501 and read Section 2.
Because steel framed structures consist of a multitude of components, itis necessary to show each of the various elements in its location relativeto the other framing members. In any ‘typical’ steel structure there cana number of levels of the structure, eg ground floor or footings support
the columns, there may be mezzanine or intermediate levels and thenthe roof level.
Each of these will be provided with a plan layout which shows the level
of steelwork and the members used in the framing.
Activity 1C Read text and draw column setout plan
1. Refer to AS 1100.501 and read Section 3.
2. Refer to AS 1100.101 and read Section 5 – Scales andrefer to Appendix B3 Scales
3. Create a new drawing directory in your home directoryarea named /…/CIVE5568/Factory
4. Create a new drawing in your home directory area named /…/CIVE5568/Factory/Column setout using an appropriatedrawing seed file.
4. Refer to Appendix C1 – Column Setout Plan of this guide.Refer also to Appendix C3 – Member Schedule of this guide.
5. Create, or reuse and modify as necessary, a suitableLevels Structure for this drawing. An example level structureis shown for reference in Appendix C2 of this guide.
6. Using the member sizes and setout dimensions shown(assume the ground slab is 300mm outside the grid lines allround), draw the Column Setout Plan.
1. Create a new drawing directory in your home directoryarea named /…/CIVE5568/Factory/Roof Framing using anappropriate drawing seed file.
2. Refer to Appendix C4 – Roof Framing Plan of this guideand to Appendix C3 – Member Schedule of this guide anddraw the roof framing plan as shown.
3. Create, or reuse and modify as necessary, a suitableLevels Structure for this drawing. An example level structureis shown for reference in Appendix C2 of this guide.
4. Refer to Appendix D – Work Samples for exampledrawings of structural steel layout plans. These areprovided as a guide and are not to be drawn.
It is important that before you start any drawing work to make sureyou read through all the Activity requirements first. This will ensureyou get a clear picture of the final activity outcome and that youformulate your proposal of what to do along the way. The activitiesshown in this course document are not necessarily designed to be a stepby step, do part 1 then move onto part 2, type of exercise. You areexpected to formulate a plan of completion and bring in all the exerciseslearned from RMIT CIVE5575 – CAD basic feature 2D drawing andRMIT CIVE5576 – CAD advanced extended feature 2D drawing studiedpreviously.
Nor are all activities completed necessarily an assessment item. Someof the following activities are to be completed as part of your personalfolio development or are to be completed progressively as part of yourfinal projects.
Remember that a lot of the work in completing a drawing is notnecessarily done using a computer and software. Planning the finalresult is often some of the best spent time; it can save you many hours,false starts and restarts, particularly when you get into some morecomplicated projects.
Once the plan has been drawn the various elevations can be produced.Refer to CIVE5575 - CAD basic feature 2D drawings for standarddrawing scales used for structural plans and details and remember thatthe relative scale of a drawing is related to the final plotted/printed textsize.
Structural drafting utilises third angle orthographic projection to depictthe three dimensional structure as a set of two dimensional drawings.
Activity 1E Read text
1. Refer to AS 1100.101 and read Section 6 - Projections.
2. Refer to AS 1100.501 and revise Section 2 – General Applications
3. Refer to AS 1100.501 and revise Section 3.3 – StructuralSteel
The structural steel layout or General Arrangement drawings are usedto show the basic framework and dimensional setout of theconstruction. They show the position of the main components of theframing and often will include the dimensional relationships. Thelayout or general arrangement drawings are usually drawn full sizeand then are scaled at 1:100 (or sometimes 1:50) and hard copies orprints made to issue to other contractors and construction personnel.The layout drawings show all the major views of the framework
including plans, elevations and relevant sections. Because structuralsteelwork layout drawings depict thin slender members, the sizes of themembers are usually shown in some sort of table or member schedule.
Once the general arrangement layout drawings are completed (or atleast underway) the detailed drawings are commenced. These showthe main connection details required for the completed structure. Oftenthese will show typical details of the work plus any specific connectiondetails required by the design. These drawings are also drawn full sizeand are generally scaled to 1:10 or 1:20 for printing and issue to other
contractors and to the construction personnel, other scales are used as
necessary if the detail is very small or complicated, these can include1:1, 1:2 or 1:5 scales.
Activity 1F Draw framing elevations
1. Create a new drawing file in your home directory areanamed /…/CIVE5568/Factory/Elevations 1 using anappropriate drawing seed file.
2. Create, or reuse and modify as necessary, a suitableLevels Structure for this drawing.
3. Refer to Appendix C5 – North Elevation of this guide andreferring also to Appendix C3 – Member Schedule of thisguide, draw the North Elevation as shown.
4. Refer to Appendix C6 – South Elevation of this guide andreferring also to Appendix C3 – Member Schedule of this
guide, draw the South Elevation as shown.
5. Refer to Appendix C7 – East Elevation of this guide andreferring also to Appendix C3 – Member Schedule of thisguide, draw the East Elevation as shown.
6. Refer to Appendix C8 – Section A of this guide andreferring also to Appendix C3 – Member Schedule of thisguide, and using the data from the previous plans andelevations, draw a cross section (A) through the building
along grid line 2 looking towards the west. Show purlinsand girts in their correct size relationships. Draw Section Aas shown.
7. Using Appendix C9 – Structural Steelwork - Notes onpage… of this guide create a set of Structural SteelworkNotes.
8. Refer to Appendix B1 – Layout and Projections on page…
of this guide and locate the Framing Plans, Elevations,
Topic 2 - Bolting and bolted connection selectionand detailing
Learning outcomesUpon the successful completion of this topic, you will be able to:
• Detail bolted connections. [LO7]
Three main types of metric bolt are used in structural engineering inAustralia:
• Commercial bolts to AS 1111, strength grade 4.6
• Medium strength or tower bolts to AS 1559, strength grade 5.6
• High strength structural bolts to AS 1252, strength grade 8.8
Commercial bolts strength grade 4.6 and high strength bolts strength grade8.8 are the two main types of bolts used in general structural steelconstruction. Design provisions for these two types of structural boltsare contained in AS 4100.
Relevant material standards referenced by AS 4100 are the currenteditions of:
• AS 1110 ‘ISO metric hexagon precision bolts and screws’
• AS 1111 ‘ISO metric hexagon commercial bolts and screws’
• AS 1112 ‘ISO metric hexagon nuts, including thin nuts, slottednuts and castle nuts.’
• AS 1252 ‘High strength steel bolts with associated nuts andwashers for structural engineering’
• AS 1275 ‘Metric screw threads for fasteners
The strength of metric structural bolts is specified in terms of the tensilestrength of the bolt and defined according to the ISO strength gradesystem which consists of two numbers separated by a point, forexample 4.6. The first number of the designation represents onehundredth of the nominal tensile strength (MPa) and the numberfollowing the point represents the ratio between nominal yield stressand nominal tensile strength.
Topic 3 - Welding and welded connectionselection and detailing
Learning outcomes
Upon the successful completion of this topic, you will be able to:
• Apply knowledge of weld types and requirements for field andsite welds. [LO4]
The aim of welding within a structure is to provide a connectionmechanism that will maintain the specified structural performancethroughout the design life of the structure.
Electric arc welding is used as a versatile method for joining steelcomponents within shop fabrication and on site applications.
The main areas of application are:
Shop fabrication
• Joining members together
• Joining plates to form fabricated sections such as plate girders etc
• Attaching stiffeners and cleat plates
• Attaching end plates and temporary connections
Site work
• Beam to beam or beam to column connections
• Member splices
• Strengthening existing structural members
• Jointing plates for silos or other plated type structures
Two main types of arc welding are used in structural engineering inAustralia:
• fillet welding
• butt welding
Additionally there are numerous other types of weld used in fabricationbut these are the major structural types.
Design provisions for these two types of weld are contained in AS 4100.
Welding shall comply with AS/NZS 1554.1, AS 1554.2 or AS/NZS 1554.5, asappropriate; welds shall be butt, fillet, and slot or plug welds, or compoundwelds.
Weld quality shall be either SP or GP as specified in AS/NZS 1554.1. Weldquality shall be specified on the design drawings.
Complete and incomplete penetration buttwelds
Complete penetration butt weld—a butt weldin which fusion exists between the weldand parent metal throughout the complete
depth of the joint.
Incomplete penetration butt weld—a buttweld in which fusion exists over less thanthe complete depth of the joint.
Fillet welds
The size of a fillet weld is specified by the leg lengths. The leg lengths
are the lengths of the sides lying along the legs of a triangle inscribedwithin the cross-section of the weld. When the legs are of equal length,the size is specified by a single dimension (tw).
The preferred sizes of a fillet weld less than 15 mm are—3, 4, 5, 6, 8, 10and 12 mm. (This allows single weld pass.)
Some relevant material standards referenced by AS 4100 are the currenteditions of:
AS/NZS
1553
1553.1
Covered electrodes for welding
Part 1: Low carbon steel electrodes for manual metal-arcwelding of carbon steels and carbon-manganese steels
1554
1554.1
1554.5
Structural steel welding
Part 1: Welding of steel structures
Part 5: Welding of steel structures subject to high levels offatigue loading
2717
2717.1
Welding—Electrodes—Gas metal arc
Part 1: Ferritic steel electrodes
The strength of welding is specified in terms of the tensile strength ofthe welding electrode and defined in AS 4100 and AS 1554 as thenominal tensile strength of the weld metal.
Principles of Welding - Weldability of Metals and Alloysreferred to in the URL shown above and read tutorials:
Arc welding
Various weld joints
Types of weld
Activity 3B Read text and draw symbols
1. Refer to AS 1101.3 Graphical symbols for generalengineering Part 3: Welding and non-destructiveexamination
2. Read the following sections:Section 2 Basic PrinciplesSection 3 Symbols For Fillet WeldsSection 4 Symbols For Butt Welds
Appendix B Design Of Standard Symbols
3. Create a new drawing file in your home directoryarea named /…/CIVE5568/Factory/Weld Details 1
using an appropriate drawing seed file.4. Create, or reuse and modify as necessary, a suitable
Levels Structure for this drawing.
5. Using AS 1101.3 Appendix B Design of StandardSymbols, draw symbols for fillet welds and single anddouble V preparation butt welds for both shop andsite locations and save the individual symbols to yourcell library.
Upon the successful completion of this topic, you will be able to:
• Interpret and apply relevant codes. [LO1]
Once the general arrangement design layout drawings are completed,or at least underway, work can commence on the design detaildrawings.
The design detail drawings show the actual connection layouts and
geometry and provide enough information to enable shop fabricationdrawings to be produced. Shop fabrication drawings are used by thesteel fabricators to cut and shape the steel sections, to weld cleats andplates and to provide all necessary holes and bolts for the erectionprocedure.
Design detail drawings are usually drawn at a scale of 1:10 but smallerscales such as 1:5, 1:2 and sometimes 1:1 can also be used.
Activity 4A Read text
1. Refer to AS 4100 and read Section 14 – Fabricationand Section 15 – Erection.
2. Refer to the AISC (Australian Institute of Steel
1. Create a new drawing file in your home directoryarea named /…/CIVE5568/Factory/Design Details 1using an appropriate drawing seed file.
2. Create, or reuse and modify as necessary, a suitableLevels Structure for this drawing.
3. Refer to Appendix C10 – Factory – Details – Sheet 1of 5 of this guide and referring also to Appendix C3 –
Member Schedule of this guide, draw the typicalcolumn cap and base detail as shown. Replace theweld notation with the correct weld symbol(s).
4. Refer to Appendix C11 – Factory – Details – Sheet 2of 5 of this guide and referring also to Appendix C3 –Member Schedule of this guide, draw the rb1 roofbracing detail as shown. Replace the weld notationwith the correct weld symbol(s).
5. Refer to Appendix C12 – Factory – Details – Sheet 3of 5 of this guide and referring also to Appendix C3 –Member Schedule of this guide, draw the typicalflybrace detail as shown. Replace the weld notationwith the correct weld symbol(s).
6. Refer to Appendix C13 – Factory – Details – Sheet 4of 5 of this guide and referring also to Appendix C3 –Member Schedule of this guide, draw the detail
C2D/PRB4 as shown. Replace the weld notation withthe correct weld symbol(s).
7. Refer to Appendix C14 – Factory – Details – Sheet 5of 5 of this guide and referring also to Appendix C3 –Member Schedule of this guide, draw the wall bracedetail as shown. Replace the weld notation with thecorrect weld symbol(s).
Upon the successful completion of this topic, you will be able to:
• Specify appropriate protective coatings. [LO6]
Bare steel will only corrode in the presence of both oxygen andmoisture and the corrosion will be accelerated when the steel issubjected to polluted environments or chemicals.
Steel inside a sealed building such as a multi-story structure is rarely atrisk of corrosion, similarly steelwork within factory or warehouse type
structures are at negligible risk of corrosion.
However bare steel is not exactly ‘pretty’ to look at and mostowners/architects/designers require some form of protective ordecorative coating. Painting, powder coating and galvanizing are justthree of the methods used to coat and protect structural steelwork fromcorrosion.
There is a very large selection of paint systems available for structuralsteel, one of the most commonly used paints is red oxide zinc chromateprimer (ROZC) which is applied over a wire brushed steel surface
while another commonly used paint is inorganic zinc silicate primerwhich is applied over class 21/2 sand blasted steel surfaces. Otherfinishing paint coats are then applied to the primed steel.
Galvanizing is a method of coating and protecting steel by dipping thesteel members into a molten zinc bath.
AS/NZS 2312 “Guide to the protection of structural steel againstatmospheric corrosion by the use of protective coatings” gives guidanceon the performance and capabilities of various paint systems.
Activity 5A Access the RMIT Australian Standardslibraries database and read text
1. Refer to AS/NZS 2312 “Guide to the protection ofstructural steel against atmospheric corrosion by theuse of protective coatings” and read the followingsections: 1.1, 1.2, 1.5, 1.6, 2, 3.1, 3.2, 3.3, 4.1, 4.2,5.1, 5.2, 5.3, 6.1, 6.2, 6.3, 7.1 – 7.6, 7.10, 9.1, 12.1,
Read – technical info - “Design basics for galvanizing” and
Read – about galvanizing – “Hot Dip Galvanizing”
www.sewl.com.au/sewl/upload/document/95-014.1.pdf
The document contained within this web site gives a full description ofa large range of steel protective coatings. Read Section 1, 2 and 4.
Activity 5B Determine suitable coating system
1. Refer to AS/NZS 2312 “Guide to the protection ofstructural steel against atmospheric corrosion by the
use of protective coatings” Appendix A and determinea suitable protective coating system for the factorybuilding developed in topics 1 and 4.
2. Develop a suitable set of notes for the protectivecoating system selected and insert into the relevantdrawings for the factory developed in topics 1 and 4.
Summary and Outcome Checklist
Tick the box for each statement with which you agree:
At the completion of Topic 5 I can:
Specify the appropriate protective coating on structural steel designdrawings
Topic 6 - Coordinating Work with Other Peopleand Disciplines
Learning outcomesUpon the successful completion of this topic, you will be able to:
• Consider other design and drafting disciplines involved in astructural design project. [LO8]
A construction project is generally a specific one-off activity with aprecise end result, the construction of ‘something’. The project can bedivided into subprojects that must be completed and accomplished in
order to achieve the final project aims.
A construction project is a complicated exercise that requires thesubtasks to be carefully coordinated and controlled in terms of timing,costs, precedence and performance of participating parties. Often anindividual project must be coordinated with other projects carried outby the design office.
Most projects go through similar stages from their instigation to theircompletion; this is known as the project life-cycle. The project iscommenced, a project team is setup and a work schedule is organized.
The project starts and momentum builds quickly, progress is maderapidly, this continues until the end of the project is in sight when itseems that all work stops or at least slows down. Often this happensbecause there is a change in the resources that the project members cancommit, also because some members of the team “drag their feet” forwhatever reason.
In most engineering and design offices, projects undergo a similarsequence – a “slowish” start – rapid progression through the bulk of thework – slow completion.
The coordination cycle can be almost the inverse of this process;coordination often needs to be concentrated at the beginning of a designproject – the design development stage, it can lessen off during theproduction stage (there is still coordination required though) andsometimes needs to be accentuated during the final stages of a projectwhen all the various discipline activities come together.
In the construction of any building works there are a large number ofdisciplines and trades involved. Many of these have their own drawingstandards and methods however they all need to come together toenable the economical and effective completion of the construction
There has been a lot of work aimed at developing and streamlining theeffective collaboration of the various consultants and disciplines on aproject; one such view has been put forward to create an effective CADmodel. Collaborative Cad Modelling In Multidisciplinary DesignDomains. By M. A. Rosenman, J. S. Gero
Key Centre of Design Computing
Department of Architectural and Design Science, University of Sydney
NSW 2006 Australia
Activity 6A Internet Research and Read Text
1. Refer to the following URLhttp://wwwpeople.arch.usyd.edu.au/~mike/PAPERS/collabC
AD.html
and read the article enclosed (in particular Sections 2 and 3)entitled:
Collaborative Cad Modelling In MultidisciplinaryDesign Domains. By M. A. Rosenman, J. S. Gero
Key Centre of Design Computing
Department of Architectural and Design Science, Universityof Sydney
2. Using the internet portal from item 1. above, selectBuilding 57 at the RMIT City Campus (this portalallows users to review the floor plans, including floorusage, of RMIT buildings)
Examine any photographs accompanying the buildingselection
Select each floor level and review the drawingsUsing each floor plan, list the features you can seewhich will require specialist consultants forcompletion of the construction of this building.