▁buildings ▁were ▁designed ▁by ▁architect ▁James ▁H oll is ▁Well s , ▁of ▁the ▁firm ▁Cl inton ▁and ▁Russell ., ▁and ▁built ▁by ▁construction ▁contract or ▁George ▁A . ▁Full er . ▁Loc ated ▁on ▁what ▁would ▁later ▁become ▁the ▁World ▁Trade ▁Center ▁site , ▁the ▁Hudson ▁Terminal ▁Build ings ▁preced ed ▁the ▁original ▁World ▁Trade ▁Center ▁complex ▁in ▁both ▁size ▁and ▁function . ▁Each ▁building ▁contained ▁ ▁of ▁office ▁space ▁on ▁each ▁floor . ▁With ▁a ▁total ▁rent able ▁floor ▁space ▁of ▁, ▁some ▁of ▁which ▁was ▁taken ▁by ▁the ▁rail road , ▁Hudson ▁Terminal ▁was ▁bil led ▁as ▁the ▁largest ▁office ▁building ▁in ▁the ▁world ▁by ▁floor ▁area . ▁ ▁The ▁to wers ▁could ▁house ▁a ▁combined ▁ten ▁thousand ▁ten ants ▁across ▁ 4 , 0 0 0 ▁offices . ▁As ▁originally ▁proposed , ▁the ▁to wers ▁would ▁have ▁a ▁combined ▁ 3 9 ▁elev ators , ▁which ▁could ▁carry ▁ 3 0 , 0 0 0 ▁people ▁a ▁day . ▁The ▁structures ' ▁electric ity - storage ▁generator ▁batter ies ▁would ▁be ▁among ▁the ▁world ' s ▁largest . ▁The ▁building ▁would ▁use ▁ 1 6 ▁million ▁br icks , ▁ 1 3 , 0 0 0 ▁light ing ▁fi xt ures , ▁ 5 , 2 0 0 ▁doors , ▁ 5 , 0 0 0 ▁windows , ▁and ▁ 4 , 5 0 0 ▁tons ▁of ▁ter rac otta , ▁among ▁other ▁things . ▁ ▁The ▁buildings ▁were ▁located ▁above ▁the ▁station , ▁at ▁ 3 0 ▁and