... 9001 : 2008 , GB ,AISI , ASTM , BS, JIS ,CE (DIN18800)Material & Grade Q235 , Q345,H C Z steel . sandwich plate , corrugated plate ... bridge, warehouse Surface galvanized , painted Technology Resistant temperature ,Fire proof, B2 grade ,Earthquake proof, Wind resistant , welding test , ultrasonic testLife over 35 years ...