sandwich panel 1.Foam Core 2.Waterproof,soundproof,insulation,fireproof 3.Coating color steel sheet 4.Density:10.12.15kg Sandwich panel1) Composed of 2 ... halls, gymnasiums, freezing stores and purification workshops (temp-keeping, heat insulation, weight bearing, weatherproof, rich color and good appearance) 3) Light ... accordance with the proof load bearing and purlin distance rockwool sandwich panel