... steel pipe, components surface is made rust-proof process.11purlinPurlin is square steel pipe, material is Q235, components surface is made rust-proof process.12wallboard50 ... ,wind load: 0.35KN/m2,design speed: 24m/S(Chinese standard)27Earthquake resistant intensity7degree28used temperatureScope: -25°C~+50°C29InstallationToolselectric drill, pulling ...