The following modification factors shall be used in calculating the development length specified in
Clauses 8.15.2.2 and 8.15.2.3:
(a)Bar location factor, k1:
(i) 1.3 for horizontal reinforcement placed so that more than 300 mm of fresh concrete is cast in the component below the development length or splice; and
(ii) 1.0 for other cases.
(b) Coating factor, k2:
(i) 1.5 for epoxy-coated reinforcement with a clear cover less than 3db or a clear spacing between bars being developed less than 6db;
(ii) 1.2 for all other epoxy-coated reinforcement; and
(iii) 1.0 for uncoated reinforcement.
(c) Bar size factor, k3:
(i) 0.8 for 20M and smaller bars and deformed wires; and
(ii) 1.0 for 25M and larger bars.
The product k1k2 need not be taken greater than 1.7.
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