two storey extn buildover waste drainage, however...

[sdilley]

plz help, i have part exposed waste drainage soil pipe which straddles my would be trench some 70% diagonally,apart from moving said soil pipe which is approx 5ft+ deep - and greif! - is it possible to either use a R/C raft and trench inside of boundary with a 2ft overhang with which to build of???-( the length of wall is to be 25ft.)

or R/C trench either end of planned area and link with an RSJ resting on an R/C raft, and build of the RSJ ??

looking forward to suggestions/reply

steve