H-beam 20 Length: 1.9m-5.9m Standard size:20cm(height)x8cm(width)x4cm(flange thickness)x27mm(web thickness) Flange: sawed-pine or spruce, Web: birch or poplar or larch plywood as web. Treated by wbp glue exterior used weather &water-proof coated by antiseptic & water-proof yellow painting.
