I need to make a section of irrigation pipe that will offset the line around an obstruction by 7". The pipe is 32" diameter and made of 11ga steel (about 1/8"). The 7" offset needs to take place over a distance of 14". Does anyone know how to layout pieces for this job or where I might find directions/calculations for doing it? I think it will need to be welded up from cut pieces but maybe it's a rolling job???