1.steel structure workshop 2.easy to install&dismantle 3.steel grade:Q235,Q345 4.ISO 9001:2000,GHD standard,SGS standard materials:EPS/rock wool/glass fibre sandwich panel for wall and roofsize: 40x100x25mwith crane of 300tC section steel, Z section steel, square steel tube, H shape beam for framesteel structurealuminum alloy shutter window and the plastic-steel for windowEPS/rock wool/glass ...