QUANTITY SURVEY QUANTITY SURVEY AND AND BILL OF QUANTITY BILL OF QUANTITY CONCEPT CONCEPT ACTIVITY LEVEL PLANNING SYSTEM
Dec 12, 2015
QUANTITY SURVEY QUANTITY SURVEY AND AND
BILL OF QUANTITYBILL OF QUANTITYCONCEPTCONCEPT
ACTIVITY LEVEL PLANNING SYSTEM
Quantity Survey - DefinitionQuantity Survey - Definition
• To calculate the quantities in a predetermined structured way.
• Bifurcating the project into small areas.
• Identifying the each activity with unique mark numbers.
• Data Base Management
Quantity Survey - AdvantageQuantity Survey - Advantage
• Tracking Scope
• Precise Resource Planning
• To avoid multiple working by various level persons
• Uniformity in Reporting & Billing
• Faster Certification
Quantity Survey - Basic - CivilQuantity Survey - Basic - Civil
• Unique Identification mark for
Drawing Number with Rev. Number
Area Code
Mark Type
Item Code
Mark Number
AreaArea• Main Project - Hydrogen Unit
- Reformer Section
- Compressor House
- Technological Structure
- Pipe Rack
- PSA Foundations
- Cable Trench
- Paving etc
Mark Type for CivilMark Type for Civil
• Pile Cap - PC
• Pedestals - PD
• Plinth Beam - PB
• Beams & Slab - BS etc
QS Code & Client CodeQS Code & Client Code• QS Code is nothing but the Client Items.
For ExampleQs Code Client Code Item Description
1 1.10 Excavation in ordinary soil1a 1.10 a Excavation in ordinary soil upto 2m1b 1.10 b Excavation in ordinary soil 2 - 3.5m1c 1.10 c Excavation in ordinary soil below 3.5m2 1.20 Back Filling with Excavated Earth3 1.30 PCC 1:4:84 1.40 RCC M205 1.50 Formwork
5a 1.50 a Formwork Straight5b 1.50 b Formwork Curved6 1.6 Rebar
6a 1.60 a Rebar upto 12mm dia6b 1.60 b Rebar 16mm & above
Mark No.- CivilMark No.- CivilConstructable Units are to be given separate Mark Constructable Units are to be given separate Mark Numbers. For ExampleNumbers. For Example
Raft - RFT1
PD1 PD2Pedestals
Mark Nos.. QS Codes Involved
1) Excavation
2) PCC
3) Rebar
4) Form work
5) Foundation Bolt
6) RCC
7) Back Filling
Mark Number - CivilMark Number - Civil
SNO UNIQUE ID UOM QTY 1 195-1/PR-A/RFT/67A/RFT-1 CUM 14.40Here,
1951 - Represents A drawing code for drawing no 195 Rev 1 which has been referred for calculating quantity.
PR-A Represents Area code for Pipe Rack for “A” Row
RFT Represents a code for type of structure which in this case is Foundation Raft.
67A Represents Activity code for item “R.C.C. in foundation M-25 Grade.
RFT-1 Represents Mark No. as shown in the above referred drawing or as suggested by the quantity surveyors for easy identification ie the Raft for pipe rack grid 1
Quantity Survey - Basic - Quantity Survey - Basic - StructuralStructural
• Unique Identification mark for
Drawing Number with Rev. Number
Area Code
Mark Type
Mark Number
Mark Type for StructuralMark Type for Structural
• Column - C• Crane Girder - CGR• Cross Beam / Tie Beam - CB / TB• Trestle - TRL• Bracing - BCG• Gusset Plate - GT• Bracket - BKT• Truss - TRS
Mark Number - StructuralMark Number - Structural
Pipe Rack Portal No.:1
Portal Column RHS
P1CR
Portal Column LHSP1CL
Portal BeamP1B1
P1B2
BracketBKT1
Bracing BCG1
Item No.: StructuralItem No.: Structural
Portal Column Mark No.: P2CR
2 Base Plate3 Stiffener
5 Rib Plate
6 Cap Plate 7 Bracket8 Moment Plate
1 Column ISMB
4 Gusset Plate
10 Rod
9 Chair Cleat
Mark Number - StructuralMark Number - Structural
SNO UNIQUE ID UOM QTY 1 195-1/PR-B/C/P2CR MT 2.50Here,
195-1 Represents A drawing code for drawing no 195 Rev 1 which has been referred for calculating quantity.
PR-B Represents Area code Pipe Rack in row “B”
“C” Represents a code for type of structure which in this case is Column.
P2CR Represents Mark No. as shown in the above referred drawing - Right Side Portal Column in Grid No 02.
STRUCTURAL - GeneralSTRUCTURAL - General
• Establishing Marking concepts with detail.
• Change of Sections updation at regular intervals
• Unit weights approvals
• Rolling Margin Establishment
Quantity Survey - Basic - PipingQuantity Survey - Basic - Piping
• Unique Identification mark for
Area / Line Number
Service
Specification
ISO No. (Drg No.)
Spool Number
Service - ExampleService - Example
• Process Water - PW
• Cooling Water - CW
• Lube Oil - LO
• Purging Oil - PO
• Steam Line Low Pressure - SL
• Steam Line Medium Pressure - SM
• Steam Line High Pressure - SH
Mark Number - PipingMark Number - Piping
SNO UNIQUE ID UOM QTY 1 AG/10SW/1502/A1A/SP21 ID/IM 50/100Here,
AG Represents Area Code for Above Ground Piping
10SW Represents the Size & Service - 10” Line for Service Water.
1502 Represents the line number which is from ISO itself.
A1A Represents the Specification of pipe - Material & Class.
SP21 Represents Spool Number.
PIPINGPIPING
• Marking the Field Joint in line with GAD
• Spoolwise BOQ Calculation
• Different Symbols for Shop / Field Joint
• Releasing the ISO & Joint Master along with ID / IM Calculation
PIPINGPIPING
• Updation of Revision Drawings & Calculation as per revision using suffix for the joints.
• Separate Marking for Joints Deleted, Modified, Tie Joints, Repair due S/C’s mistake.
• As built drawing after completion
PIPING BOQPIPING BOQ
Spool No.: 21BOQ
1) Pipe size & length2) Elbow size & length3) Valve size & length
Joint Master
1) No. of shop joint & size 2) No. of field joint & size
Total Inch Mtr. of Spool 21
Total Inch Diaof Spool 21
ISO No. 1502
1
2
3
4
5
6
Process Cycle - Quantity SurveyProcess Cycle - Quantity Survey
BOQ Preparation by SE/QS
Cross Checking by PE
Submission to Client
Approval by Client by QS/PE
Copy to SEExecution
Deviations/Change of sections from SE
Incorporation in QS
Submission & Approval from Client by QS/PE