Post on 12-Dec-2015
description
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