BoQ Flashcards
Sources of cost information (5)
Published books (SPONS, NSR)
In house cost data (developed from last projects)
Subcontractor/suppliers cost information
Building up unit rates from first principles
Building Cost Information Services (BCIS)
What is a Bill of quantities
Document used in tendering in which labour, materials and plants are itemised.
Composition of BoQ
Form of tender
Summary
Preliminaries (2 sections)
Measured work
Risks
Provisional sums
Credits
Dayworks
Format of the Bill
The bill for each work section commences on a new sheet
The total for each work section is carried to main summary
Avoids use of certain letters such as O and I to avoid confused with 1 and 0
NRM2 codes can be used as reference number
Preliminaries
Cost of administering a project and providing general plant, site staff, facilities, and site- based services and other items not included in the rates
Preliminary sections
Part A- information and requirements (descriptive part)
Part B- pricing schedule (basis for pricing) subdivided: (1) employers requirements (2) main contractors cost items
Nature of preliminaries
There is no fixed % addition to total contract sum. It varies from one project to another.
Usually one of the last operations before adjustments for the form of tender.
All in hourly rate
Average hourly rate of workers.
Calculated by yearly cost divided by total hours of work or by weekly.
All-in-rate
Price attached to an item on BoQ, include labour, materials, plants, profit and overhead costs.
explain preliminaries in tendering and estimating and give 5 examples to be included 15 marks
the general costs, unrelated to specific construction work, they are not included in the rates. 5 examples are: site set-up (staff. signs, site offices), temporary works (scaffolding, formwork, temporary access roads), HS compliances (PPE, risk assessments, fire safety), project management and supervision (salaries for project manager, site supervisor), utilities and services ( temporary electricity, water supply, drainage).
