1.hot rolled channel steel 2.length:6m ,9m ,12m 3.material:Q195,Q215, ... Q345 A36 SS400 SS540(3)length:6m,9m,12mGB standard channel steelstandh(mm)b(mm)d(mm)teoretic weight550374.55.438kg ... /m 40#c40010414.571.488kg/m gb standard hot rolled channel steel