... dia. from 1.0mm to 80 mm), square tubes, rectangular tubes, FRP profiles, etc. cover wide ranges. The ... waste treatment equipment, greenhouse structures, scaffold, portable work platforms, cooling tower, luggage rack, window/door frame, sign post, bridge structure, ... kart, bodyshell, wind turbine blade5) Pipe: gutters, firewater/ cooling water /gas /drinking water/ waste water pipe6) Building: roofing ...