Contracts 'with quantities' are priced on the basis of drawings and firm bills of quantities. 'Without quantities' means a contract priced on the basis of drawings and usually another document, such as a specification or work schedules.
There are three main types of contract that use the SIA Conditions, namely: the Lump Sum Contract; Measurement Contract; and. Minor Works Contract.
The most commonly used standard forms of contract in Singapore are the Singapore Institute of Architects (“SIA”), Real Estate Developers' Association of Singapore (“REDAS”) and Public Sector Standard Conditions of Contract (“PSSCOC”) standard form contracts.
Clause 4.11 – In the event of non-payment or non-compliance with the above-mentioned Clauses, the Contractor has the right to suspend works and the process for doing so is explained in this Clause.
The employer must provide drawings together with a description of works, and either a specification or work schedules at tender stage. The project is generally not complex enough to require bills of quantities.
The JCT Standard Building Contract is designed for large or complex construction projects where detailed contract provisions are needed. Standard Building Contracts are suitable for projects procured via the traditional or conventional method.
One of the unique features of the Singapore Institute of Architects Articles and Conditions of Building Contract (“the SIA Contract”) is that the contractor is assured of periodic valuation of works carried out and amounts expressed to be payable in the interim certificates.
The most commonly used standard forms of contract in Singapore are the Singapore Institute of Architects (“SIA”), Real Estate Developers' Association of Singapore (“REDAS”) and Public Sector Standard Conditions of Contract (“PSSCOC”) standard form contracts.
On the basis of formation, the types of contracts are express contracts, quasi-contract, implied contracts, and E-contract. Based on performance, contract types are executed contracts, unilateral contracts, executory contracts, and bilateral contracts.