steel structure H, C style steel and square tube Q235,Q345 standard factory, workshop, market, etc. ISO9001-2008 steel structureFire-proofing ... light weight house CECS102 2002High quality carbon construction steel GB/T 699 1999Company IntroductionWen'an County Lafanti ... T-type modular house, container-type house, steel plants, light steel villas. All products advanced technology, strict quality.With ...