L3 - Quantification and Costing Flashcards
What does JCT SBC describe a Variation as?
the alteration or modification of the design, quality or quantity of the Works
What’s the construction cost of a school £/m2?
Depends on school size/use, check National School Delivery Cost Benchmarking by Infrastructure and Projects Authority
Circa £2,500/m2 on my project
How would you price prelims?
Dependant on the Stage.
Stage 0/1 - Assessment of cost analyses of previous buildings. PERCENTAGE 10% - 20%
Stage 2/3/4 - Cost check prelims using NRM1 (section 9 in part 4). Project particulars may make prelims expensive e.g. cranes/scaffolding/size of project etc.
How would you price OH&P?
Derived from a properly considered assessment of main contractor’s overheads and profit found on previous building projects
How have you priced consultant/design fees on your projects?
I haven’t priced consultant fees, they’ve been excluded (client request) however I would use percentage addition similar to previous projects if I had to.
Design fees - similar projects with similar design scope.
How have you quantified risk on your previous projects?
Not a standard percentage, but a properly considered assessment of the risk, taking into account the completeness of the design
Risk types:
- Design development
- Construction risk
- Employer change
- Employer other
What is included/excluded in GIA?
Included:
- Core areas
- Area measured at ground
- Areas taken up by IW/columns/beams
- Stairwells, vertical projections
- Mezz floors w/ perm access
- Voids over stairwells
- Structural, raked or stepped floors are to be treated as a level floor measured horizontally
Excluded
- Perimeter wall
- Open sided external balconies
- Canopies
- Voids over/under raked/stepped floors
- Voids above GF atria
- Greenhouses, garden stores, fuel stores (resi)
What’s the relationship between the RICS Property Measurement 2nd Edition, RICS Code of Measuring Practice 6th Edition and IPMS?
RICS Property Measurement 2nd Edition 2018 - This is a Professional Statement, states what we should use and when. Office and Residential = use IPMS.
Code of Measuring Practice 6th Edition 2015 = Guidance Note, how to measure GIA, NIA, GEA
IPMS - how to measure IMPS1, IMPS2, IMPS3 for offices, resi, industrial and now retail.
What are the full names for NRM1 and NRM2?
New Rules of Measurement 1: Order of cost estimating and cost planning for capital building works
New Rules of Measurement 2: Detailed measurement for building works
How is NRM1 structured?
1 - Context & definitions
2 - Rules for preparing OCE, how to quantify non-measurable works
3- Rules for cost planning, how to quantify non-measurable works
4 - Tabulated rules of measurement
Appendices
How is NRM2 structured?
1 - Context & definitions
2 - Rules for preparing Bill of Quants, Schedule of Rates, how to quantify non-measurable works such as risk, contractors design works
3 - Tabulated rules of measurement
Appendices
What’s the difference between a cost estimate and a cost plan?
Cost plan is an iterative process, updated and tracked as design progresses, to control the development of the design and ensure the client achieves value
How does NRM break down project costs? (15)
0 - Facilitating works 1 - Substructure 2 - Superstructure 3 - Internal Finishes 4 - Fixtures, Fittings & Equipment 5 - Services 6 - Prefabricated buildings and building units 7 - Works to existing buildings 8 - External works 9 - Main Contractor's Prelims 10 - Main Contractor's OH&P 11 - Project/design team fees 12 - Other project/development costs 13 - Risk allowances 14 - Inflation VAT
What are the elements to the building works estimate? (8)
1 - Substructure 2 - Superstructure 3 - Internal Finishes 4 - Fixtures, Fittings & Equipment 5 - Services 6 - Prefabricated buildings and building units 7 - Works to existing buildings 8 - External works
What’s the works cost estimate?
0 - Facilitating works 1 - Substructure 2 - Superstructure 3 - Internal Finishes 4 - Fixtures, Fittings & Equipment 5 - Services 6 - Prefabricated buildings and building units 7 - Works to existing buildings 8 - External works 9 - Main Contractor's Prelims 10 - Main Contractor's OH&P
What’s included in the cost limit?
0 - Facilitating works 1 - Substructure 2 - Superstructure 3 - Internal Finishes 4 - Fixtures, Fittings & Equipment 5 - Services 6 - Prefabricated buildings and building units 7 - Works to existing buildings 8 - External works 9 - Main Contractor's Prelims 10 - Main Contractor's OH&P 11 - Project/design team fees 12 - Other project/development costs 13 - Risk allowances 14 - Inflation CAN BE INCL OR EXCL INFLATION
Define NIA
The usable area within a building measured to the internal face of the perimeter walls at each floor
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Define GEA
The area of a building measured externally at each floor level.
Define GIA
The area of a building measured to the internal face of the perimeter walls at each floor level
What’s the difference between GIA and IPMS2 office?
- IPMS uses internal dominant face, GIA uses internal face (brick/block work or plaster coat)
- Rooftop terraces included but stated separately
What’s the difference between NIA and IPMS3 office?
- IPMS 3 measured to CL of walls separating two tenancies
- IPMS3 includes columns
What’s included/excluded in NIA?
Included
- Atria, lobbies etc that are tenant sole occupancy
- Kitchens in sole occupancy
- Built in cupboards etc in usable area
- Areas occupied by skirting/trunking
- Areas occupied by non-structural walls subdividing accommodation in sole occupancy
Excluded
- Internal structural walls, walls enclosing excluded areas, columns, piers, chimney breasts, other projections, vertical ducts, walls separating tenancies
- Common use areas (e.g. WCs, lobbies)
- Lift rooms, plant rooms, tank rooms
- The space occupied by permanent and continuous air-conditioning, heating or cooling apparatus, and ducting in so far as the space it occupies is rendered substantially unusable
- The space occupied by permanent, intermittent air-conditioning, heating or cooling apparatus protruding 0.25m or more into the usable area
- Areas with a headroom of less than 1.5m
- Areas rendered substantially unusable by virtue of having a dimension between opposite faces of less than 0.25m
- Areas for vehicle parking
What’s a cost/ft2 for a strip out of a London office?
C. £7/sqft London office based on experience, not too cellularised
Can vary depending on factors such as cellularisation, access to building etc
What would you expect for a cost/sqft London office fit-out shell to cat a?
c. £45 - 55 sqft for high end office London
Cost/ft2 for a 2-bed resi unit in central London?
CHECK - NOT MY SPECIALITY - £250K?
What’s BCIS?
Building Cost Information Services - Cost and price information is collected by BCIS from across the UK construction industry, then collated, analysed, modelled, interpreted and made available to the industry to facilitate accurate cost planning.
Where would you get rates from?
BCIS, historic in house data, SPONs, build up rates, market test
What are the RIBA stages?
0 - Strategic definition 1 - Preparation and brief 2 - Concept design 3 - Developed design 4 - Technical design 5 - Construction 6 - Handover and close out 7 - In use
What purpose does the RIBA PoW 2013 serve?
- Splits project into key project stages w/ defined outcomes
- Shared framework for design and construction
- Offers both a process map and a management tool.
How would you go about market testing?
- Hide name of project/client
- Speak to supplier, give quants, drawings if necessary, get price for materials
- Speak to subcontractor, give quants, drawings if necessary, get price for labour
GET PARTIES TO SIGN NON-DISCOUSURE AGREEMENT
What’s a non-disclosure agreement?
A legal contract between at least two parties that outlines confidential material, knowledge, or information that the parties wish to share with one another for certain purposes, but wish to restrict access to or by third parties
What are the advantages of market testing?
Current day cost for works, bespoke to the projects actual requirements
