Civil Engineering Reference
In-Depth Information
13.4
.1
.3 The valuation of Variations to the sub-contract works executed by a
Nominated sub-Contractor in accordance with instructions of the
Architect and of all instructions issued under clause 13.3.2 and all
work executed by a Nominated Sub-Contractor for which an
Approximate Quantity is included in any bills of quantities included
in the Numbered Documents shall (unless otherwise agreed by the
Contractor and the Nominated Sub-Contractor concerned with the
approval of the Employer) be made in accordance with the relevant
provisions of Conditions NSC/C.
13.4
.2 Where under the instruction of the Architect as to the expenditure of a
provisional sum a prime cost sum arises and the Contractor under
clause 35.2 tenders for the work covered by that prime cost sum and
that tender is accepted by or on behalf of the Employer, that work shall
be valued in accordance with the accepted tender of the Contractor and
shall not be included in the Valuation of the instruction of the Architect
in regard to the expenditure of the provisional sum.
13.5
.1 To the extent that the Valuation relates to the execution of additional or
substituted work which can properly be valued by measurement or to
the execution of work for which an Approximate Quantity is included in
the Contract Bills such work shall be measured and shall be valued in
accordance with the following rules:
13.5
.1
.1 where the additional or substituted work is of similar character to,
is executed under similar conditions as, and does not significantly
change the quantity of, work set out in the Contract Bills the rates
and prices for the work so set out shall determine the Valuation;
13.5
.1
.2 where the additional or substituted work is of similar character
to work set out in the Contract Bills but is not executed under
similar conditions thereto and/or significantly changes the quantity
thereof, the rates and prices for the work so set out shall be the basis
for determining the valuation and the valuation shall include a fair
allowance for such difference in conditions and/or quantity;
13.5
.1
.3 where the additional or substituted work is not of similar character
to work set out in the Contract Bills the work shall be valued at fair
rates and prices;
13.5
.1
.4 where the Approximate Quantity is a reasonably accurate forecast of
the quantity of work required the rate or price for the Approximate
Quantity shall determine the Valuation;
13.5
.1
.5 where the Approximate Quantity is not a reasonably accurate fore-
cast of the quantity of work required the rate or price for that
Approximate Quantity shall be the basis for determining the Valu-
ation and the Valuation shall include a fair allowance for such
difference in quantity.
Provided that clause 13.5.1.4 and clause 13.5.1.5 shall only apply to the
extent that the work has not been altered or modified other than in
quantity.
