You should know the differences between a broker and a contract manufacturer when undertaking a pre-engineered steel structure project. Hoping to amplify profits, brokers look for the lowest priced building supplies to fill the order with anticipation of enticing building shoppers to their low costs. Brokers are often concerned with approximating the size to the lowest cost (and normally cut-rate caliber) materials. Brokers will not supply much, and for some structures, no assistance to the prospective buyer.