... 2.Easy to install, 3.fire proof, 4.good insulation 5.Steel Q235/Q345 Prefabricated Steel Structure FactoryCertificate:ISO9001:2000 Oversea ... /Q345 Easy to install,fire proof,good insulationPlace of OriginZhejiang, China Standard GB,ASTM,DIN,JIS,BS,AISI Type Heavy Duty ... contact us . Expert Manufacurer Prefab Modular Light Steel Structure Factory from China