Preliminaries in construction
Preliminaries (or 'prelims') provide a description of a project that allows the contractor to assess costs which, whilst they do not form a part of any of the package of works required by the contract, are required by the method and circumstances of the works.
The Code of Estimating Practice published by the Chartered Institute of Building describes preliminaries as '...the cost of administering a project and providing general plant, site staff, facilities, and site based services and other items not included in the rates.'
NBS suggest that 'the purpose of preliminaries is to describe the works as a whole, and to specify general conditions and requirements for their execution, including such things as subcontracting, approvals, testing and completion.'
Preliminaries and work sections together describe what is required to complete the works required by the contract. Preliminaries should not be confused with 'preambles' which set out things such as tendering procedures, that will not affect the contractor's price.
Preliminaries (see overheads) may contain:
- A general summary.
- Method statements.
- Pre-construction information.
- Details of any alternative options to be put forward by tenderers.
- A description of any planning conditions or other conditions that may affect the work to be carried out by the contractor.
- A description of any outstanding statutory approvals that may fall to the contractor to satisfy.
- Party wall requirements or other agreements with, or rights of, neighbours (such as rights to light).
- Any emergency services obligations.
- A description of the reporting information that the contractor will be required to submit (often on a monthly basis) describing construction progress (including a detailed critical path programme, key performance indicators and earned value analysis). See Construction progress reports for more information.
- A description of the commissioning strategy, separating setting to work and balancing tasks from independent verification by the consultant team.
- Relevant reports (such as soil reports).
- Perhaps an information release schedule.
- Quality management procedures.
- Labour relations.
- A declaration of non-collusion.
- Schedules of mock-ups, testing and samples required from the contractor.
- The method of sub-contracting.
- Requirements for insurance, performance bonds, warranties and product guarantees (for the contractor and sub-contractors).
- Requirements for the operating and maintenance manual (the client's facilities management team may wish to comment on this).
- Requirement for progress photos to be taken on site during construction and off-site during fabrication.
- Dates for partial possession.
- Collaborative practices.
- Building information modelling (BIM) requirement and protocols (including requirement for BIM in sub-contracts).
- Site waste management plan.
- Contractor's site preliminaries, such as; staff, welfare provisions, site offices, plant, site waste clearance, water, electricity, site offices, furniture, ICT and consumables, rates, protection of work, protective clothing, site transport, setting out, building control fees, and so on.
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