Too much erroneous information asked for people. This is in Western australia - no ice. The pipe carries a poly pipe getting water from a dam at a local winery. dont worry too much about debris, I will factor this in when I have a ball park number. if I can get this done who knows maybe the...
More Info - The bridge is timber pile, Concrete abutment, timber deck - 3 span. Overall Depth water course bed to under side of bridge 4m (12.3'). Pipe located 1m down from deck. Location of pipe non negotiable.
I have a (suggested) 150 (6")dia steel pipe supported at 6m (20')spacing from the bridge piles across a stream. The water will cover the pipe at flood time by about 1m (say 3'). How do I calculate the loading on the pipe for a structural check of the pipe and its supports. Stream peak flow...