Quantification & Costing Flashcards
Strip Foundation Take Off
- Excavation,
- disposal,
- compaction,
- formwork,
- blinding,
- hardcore,
- concrete.
Drainage Take Off
- Excavating trenches stating average depth (500mm increments)
- Granular bed
- Pipe type and size
- Backfill and disposal of excess excavated material
- Manholes; type and size
- Connection to existing drains.
NRM1 Cost Plan Structure:
0; Facilitating Works
1-8; Building works (see separate breakdown)
9; Preliminaries
10; Overhead & Profit
- Works Cost Estimate (Construction)
11; Design Team Fees:
Architect, Civils, M&E, Project Manager, Quantity Surveyor, Principal Designer
12; Other development:
Finance, Planning, Insurances, Party wall, Marketing, Ecology, Archaeology etc.
- Base Cost Estimate (Development)
13; Risk Allowances:
Design Development, Construction Risk, Employer Change, Employer Other
- Cost Limit exc. Inflation (Dev & Con x Inflation)
- Construction Inflation (tender return to the mid-point of the construction programme) Tender Inflation (cost plan date to tender return)
- Cost Limit Inc. inflation (Dev & Con inc. Inflation)
VAT assessment (requirement to be assessed by a tax specialist)
Dayworks
- Prime cost of the works with a percentage uplift.
- Contractor must provide dayworks sheets within 7 days of works. - Materials, labour, plant & OHP.
- Used when works cannot be quantified prior.
- E.g. breaking out obstructions in the ground as the extent of work is only known after it has been completed.
Principles of Measurement International (POMI)
- International guidance for producing a BoQ (RICS).
- Widely used on international contracts
- e.g. Works procured and managed in the UK but works located abroad. (International Equivalent to NRM2)
BIM
- Building Information Modelling creates and manages information over the course of a construction project lifecycle.
- Not widely adopted due to:
- cost,
- training,
- software integration.
Cost Approaches (detail)
GIA - £/m2
Strategic
Functional -£/per bed/person etc; Resi, Flats, Houses - Hospital; Beds – School; Nr of students
Feasibility
Elemental – NRM; Substructure, Superstructure etc
OoCE
Element – Ground Floor Slab, Upper Floor, Roof, External wall
Formal Cost Plan
Piled Foundation Take Off
- End bearing, bored pile;
- Excavate & dispose to formation level,
- piling mat,
- setup piling rig,
- excavate,
- dispose,
- place concrete, reinforcement,
- pile caps,
- cut off heads,
- testing
What would you do if you weren’t sure on how to measure something?
I would review NRM1 if I was undertaking costing for a Cost Plan or NRM2 if more detail was required
GFS Take Off
- excavate,
- dispose,
- compact ground,
- hardcore,
- insulation,
- damp proof membrane,
- concrete,
- screed (consistent level for racking)
Kings Tower - NIA to GIA
- 15k m2-
- Existing building inc to make communal area.
- Reduced Net to Gross to 75%
- 80% typical
BoQ vs CSA Princess Street
- 12 unit apartment so works considered simple in nature - CSA adequate to capture works
- BoQ appropriate if works complex to facilitate tender comparison and accurate valuation
NRM 2 - Foundation excavation
- NRM 2
- State ground level
- M3 Excavation not exc 2m, 2-4m, 2m stages after
- NRM 1
- Foundation confirmed as M - depth, width stated
Difference between NRM 1 vs 2
NRM 1 - Cost planning (pre-contract)
NRM 2 - Detailed measurement (post-contract i.e. trade package award - greater detail required)
Importance of Measurement Rules
- Provide consistency to measurement of construction works which allows comparison on a like for like basis.