 A shipping and receiving ramp , which served the entire World Trade Center complex , occupied the eastern quarter of the 7 World Trade Center footprint . The building was open below the 3rd floor , providing space for truck clearance on the shipping ramp . The spray @-@ on fireproofing for structural steel elements was gypsum @-@ based <unk> which had a two @-@ hour fire rating for steel beams , girders and trusses , and a three @-@ hour rating for columns . 
