Preestimating requirements r1

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Lecture 5

Pre-estimating Requirements

● Mat Naim Abdullah● [email protected]● C04-308


Pre-construction - Information

CONSTRUCTION STAGES

Tendering & Procurement

Construction

Operation & Maintenance

Designing & Tender Document Preparation

Inception


THE BUILDING COMMUNICATION

1. Drawings 2. Specification3. Bills of Quantities (BQ)4. Tender Documents5. Contracts Documents6. Work Programmes7. Operation & Maintenance Manual


2. The Drawings

Imagine!!!!!! How to

design and draw?


2. The Drawings (Cont’d)

Types of Drawings 1. Conceptual Drawings2. Tender Drawings3. Contract Drawings4. Construction Drawings5. Shop Drawings6. As-built Drawings



Conceptual Drawings – What can you see?



Conceptual Drawings – What can you see?


AERIAL PERSPECTIVE



CONSTRUCTION DRAWINGS CIQ COMPLEX - FRONT ELEVATION



CONSTRUCTION DRAWINGS CIQ COMPLEX - LEFT ELEVATION



CONSTRUCTION DRAWINGS CIQ COMPLEX - PARTIAL SECTION

BUS & COACHESLV

MOTORCYLES

HGV



To Malaysia

To Singapore


CONSTRUCTION DRAWINGS - CIQ Layout Plan (Level 1)


CONSTRUCTION DRAWINGS

Offices & Passengers’ Hall (Level 2)

To

Malaysia

To

Singapore




Shop Drawings – What can you see?



As Built Drawings – What can you see?

Any difference from the construction drawings?






Bills of Quantities (BQ)

The forms where the contractor fills in his price based on:

1. The description of works2. Quantities3. Unit – m, m2, m3, kg, Lump sum, Item, No.

Preparation of BQ is by Quantity Surveyor based on the Standard Method of Measurement (SMM)

Example of BQ


Specification

Specification – Describe: 1. Materials2. Standard of materials 3. Construction processes & 4. workmanship.

Making Cake


Tender Documents

Tender Documents 1. Instruction to tenderers

2. Form of tender

3. Conditions of contracts

4. Bills of Quantities

5. Tender Particulars

6. Tender Drawings

7. Specification

8. Proposed work programme


Instruction to Tenderers & Form of Tender

Instruction to Tenderers contains:1. The content of the tender documents2. Selection of the tenderers3. Visiting the site4. Procedure for addendum5. Procedure for tender preparation &

submission6. Content of Bills of Quantities7. Opening & closing of tender8. Any significant matters related to the

project

Form of Tender is a declaration by the tenderer to abide to the instruction of tenderers


Conditions of ContractThe Details of Agreement between the Employer and the Contractor. Usually consists of:1. Contractor’s liabilities2. Provision of preliminary works3. Variations4. Payments5. Commencement & completion6. Defects liability 7. Delay & extension of time8. Termination9. Mediation & Arbitration


Contract Documents

Contract Documents 1. Letter of Award

2. Instruction to tenderers

3. Form of tender

4. Conditions of contracts

5. Agreed Bills of Quantities

6. Tender Particulars

7. Contract Drawings

8. Specification

9. Agreed work programme


Work Programme

Indicate the time to complete each of the construction activities or

package of the project in the form of bar chart or Critical Path Method,

hence the total completion period for the whole project.


Master Implementation Programme

ACTIVITY2002 2003 2004 2005 2007

Jun ‘07Mar ‘03

May ‘05

Aug ‘02 Jul ‘06CIQ Facilities

Operational (Dec ’06)

2006

Jul ‘05

Sep ‘02 May ‘06

Jun ‘03 Aug ‘06

Oct ‘02 Dec ‘05

CIQ Complex

JB Sentral Terminal

Interchange No. 1 & Other Infrastructure Works

Road Bridge (Suspended)

Rail Bridge (Suspended)

Causeway Removal/ Navigation Channel

JBS Short Term Access

LEGEND: Milestones

Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4Q2 Q3 Q4 Q1 Q2 Q3Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1

Jan ‘03

Mar ‘04

Jan ‘06

Oct ‘02

Aug ‘03

Apr ‘03

Apr ‘07

Section 1 Section 2

Physical WorksCommencement

Stage Completion Works

Jul ‘07

Short Term Access Nov ‘04 Dec‘06

(Suspended)

Feb ‘06

Oct ‘05

CIQ BuildingVPA


Work Programme

Exam

ple of

work

progra

mme


The pre-estimating requirements

1. Drawings2. Specification3. Rate – Built-up rate, sub-

contractor’s price or schedule of rate

4. Work programme


Built-up Rate

1. Material’s cost2. Manpower’s cost3. Machinery’s cost4. Wastage5. Margin