Anonymous Coward writes:
I am building a canopy for a loading dock. I need to span distances of 40 feet and 20 feet. I will be supporting a deck comprised of 1"x3"x.60 Hat Channel covered with corregated steel sheets on top of ladder trusses that I will build with angle steel and steel pipe welded. Total square footage 800 sq feet. I will use 4 vertical support columns that will be I Beams. I will tie the vertical supports together with 4 laterals on top to frame support for the trusses. I need to size the I beams for this support. I already have half inch pipe schd 40 and 2"x2"X 1/8" angle steel for the trusses. The vertical and laterals for the building frame need to be steel. Are I beams the best answer as they are readily available to me and cheap? What size I beams are sufficient? They will be anchored to four footings in the dock slab with 3/4"x6" anchor bolts- 4 each.