1. Low alloy high strength structural steel Q235B and High Frequency Welded Light Gauge H sections 2. ... welded light gauge H Sections for contruction 1.standardGB/T 1591, GB/T700, ASTM, EN, DIN2. Steel gradeST37, A36, SS400, ST52 ... beam, Bridges, transmission tower, lifting transportation machinery, the ships, the industrial furnace, container frame and warehouse shelves.8.delivery5-10 ...