... structure workshop SpecificationsStandard GB ,AISI , ASTM , BS, JIS ,DINMaterial & Grade Q235 , Q345,H C Z steel . sandwich panel , corrugated plate Dimensions 10sqm—100000sqm ... , warehouse Surface galvanized , painted Technology Resistant temperature ,Fire proof, B2 grade ,Earthquake proof, Wind resistant , welding test , ultrasonic testLife over 35 ...