... Direct factory,best price 4.Light weight SpecificationsPrefabricated steel structure warehouse has the advantages of being low cost, ... using lifespan: up to 50 yearsOthers: environmental protection, stable structure, earthquake resistance, water proofing, and energy conservingWe can quote ... need crane beam, parameter is in need.Drawing 1. Quote as clients' drawing 2. Design as per clients' requests and ...