Coefficients for use with the Contract Price Adjustment Formula (CPAF) for Works of Civil Engineering Construction
It is stressed that the coefficients provided below are issued as a basic guideline only and are subject to amendment, depending on the specific requirements and variations contained in differing types of contracts.
|
No.
|
Work Category
|
Labour
|
Plant
|
Materials
|
Fuel
|
|
1
|
Bulk Earthworks
|
0.10
|
0.65
|
0.05
|
0.20
|
|
2
|
Earthworks (with culverts and drainage)
|
0.15
|
0.50
|
0.20
|
0.15
|
|
3
3.1
(a)
(b)
3.2
(a)
(b)
|
New Road Construction:
National Provincial Roads:
Including bitumen
Excluding bitumen
Urban Roads:
Including bitumen
Excluding bitumen
|
0.15
0.20
0.25
0.30
|
0.35
0.40
0.15
0.30
|
0.35
0.25
0.55
0.35
|
0.15
0.15
0.05
0.05
|
|
4
(a)
(b)
|
Township Roads and Services
Including bitumen
Excluding bitumen
|
0.20
0.21
|
0.25
0.27
|
0.45
0.42
|
0.10
0.10
|
|
5
(a)
(b)
|
Rehabilitation/Resurfacing Works
Including bitumen
Excluding bitumen
|
0.15
0.20
|
0.25
0.35
|
0.50
0.35
|
0.10
0.10
|
|
6
(a)
(b)
|
Routine Maintenance Works
Including bitumen
Excluding bitumen
|
0.45
0.48
|
0.30
0.37
|
0.15
0.05
|
0.10
0.10
|
|
7
|
Water and Sewer Reticulation
|
0.15
|
0.20
|
0.55
|
0.10
|
|
8
|
Concrete Works (reservoirs and other general civil engineering works)
|
0.25
|
0.15
|
0.55
|
0.05
|
|
9
|
Concrete Works (major structures)
|
0.15
|
0.20
|
0.55
|
0.10
|
Notes:
- On roadwork contracts where bitumen is excluded from the escalation formula and treated as a “special material”, the coefficients detailed under 3.1(b), 3.2(b), 4(b), 5(b) and 6(b) should be used.
- Where there is a major component in a contract, such as cement (in the construction of a concrete road or a large dam) or reinforcing steel (in the construction of a large concrete structure), then consideration should be given to treating these components as “special materials.” This is consistent with the provisions of the General Conditions of Contract for Construction Works, 2004 (GCC 2004). This may also apply to major materials for specialist Subcontractors.
- The coefficient for fuel may need to be revised from time to time, as it has a tendency to increase out of proportion to the other factors in the CPA Formula.
- Accepting the fact that the coefficients are offered as a basic guideline only, it is proposed that where modification of the coefficients is required for a specific category of work, this should be resolved at the site inspection or, where necessary, renegotiated with the Client.
|
