... load-bearings and significantly strengthen the stability of the project, low cost, practical, artistical, fashionable and durable; ... reduce pollutions to the enviroment. 1. Certificate: ISO 14001:2004, ISO 9001:2008, OHSAS 18000;2. Features: fast and ... grain storages, sports venues, workshops, railway stations, the extension project, and roof construction, etc. Needing more steel structure products, ...