dik, sorry for poor communication 100mm diameter cast in pipes cast in an L shape with 400mm of concrete ontop and 500mm of concrete below (see the section).
There is a 10 storey building being supported on-top of this slab, with considerable loads on some of the columns. In the range of...
I am designing a 1m thick raft slab and the drainage guys have thrown in 100mm diameter cast in pipes all over the raft. See Attached images 1 & 2. Wondering how this will affect the shear in the raft and how i can go about calculating required shear reinforcement for a) the column and b) the...