Prefabricated Steel building kits, metal barns, quonset huts and prefab garages. Amazing Steel building prices on arch and structural steel buildings in Canada. First Class Steel Building Inc. offers the highest quality steel buildings available Canada. We are an Authorized Factory Direct Dealer for Rocket Steel Buildings (Steel-Arch buildings / Quonset Huts) as well as custom designed Pre-engineered Structural Steel buildings from R&M Steel.