WEDO iso certificate railway steel bridge for sale 1. trussed construction 2. Total weight from 100 tons to 20000 tons 3. Material: Q235B, Q345B 4. Surface: paint or HDG 5. Standard: GB, JIS, ASTM,BS, DIN Parts included: 1. Steel Sleeper used on the steel bridge 2. Main Girder 3. Floor Beam 4. Stringers 5. Lower lateral bracings z
