| 15224 PVC Pipes
PVC drainpipes for cable drawing shall generally comply with the requirement of BS 5481.
The pipe laying shall fully comply with the requirements as set out for UPVC drainage pipes in the Sanitary Installation section of this Specification.
PVC pipe laid for cable drawing shall be measured in length and understood as including all earth, masonry and concrete work.
15225 Manholes
Manholes shall be in precast concrete C-20 quality, brick or Class a hollow block work as indicated and detailed in the drawings. The manholes shall be laid on a minimum concrete bed of 150mm, C-20 concrete. Manholes other than precast concrete shall be rendered internal and externally with two coats of cement mortar. Joints of precast concrete manholes shall be flush pointed.
Manholes covers shall be in cast iron cover and frames or C-25 precast concrete as detailed in drawings.
Manholes shall be enumerated stating size and shall be deemed to include related earth and other works for the completion of the work.
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