▁increasing ly ▁heavy ▁mach in ery . ▁ ▁This ▁theory ▁is ▁given ▁added ▁weight ▁by ▁the ▁fact ▁that ▁at ▁around ▁the ▁same ▁time ▁the ▁tim ber ▁be ams ▁used ▁to ▁support ▁ce il ings ▁were ▁replaced ▁with ▁steel ▁be ams ▁to ▁strength en ▁the ▁building . ▁ ▁In ▁ 1 9 3 0 ▁the ▁Beng al ▁Street ▁block ▁was ▁also ▁reduced ▁in ▁height ▁by ▁ 2 ▁store ys ▁and ▁but tr esses ▁were ▁constructed ▁against ▁the ▁south ▁wall ▁of ▁De cker ▁Mill . ▁ ▁By ▁the ▁ 1 9 4 0 s ▁Fire proof ▁Mill ▁and ▁Dou bling ▁Mill ▁were ▁occupied ▁by ▁a ▁bed ding ▁manufact urer . ▁ ▁In ▁ 1 9 4 8 , ▁the ▁break - up ▁of ▁the ▁main ▁site ▁began ▁with ▁Old ▁Mill ▁and ▁De cker ▁Mill ▁being ▁sold , ▁with ▁the ▁Murray ▁Street ▁block ▁following ▁in ▁ 1 9 5 0 , ▁and ▁the ▁Beng al ▁Street ▁block ▁in ▁ 1 9 6 0 . ▁Old ▁and ▁De cker ▁Mill ▁were ▁used ▁as ▁a ▁w are house ▁after ▁ 1 9 5 4 ▁and ▁later ▁used ▁by ▁several ▁cl othing ▁manufact ur ers . ▁ ▁Although ▁some ▁work ▁was ▁done ▁to ▁strength en ▁the ▁structure ▁in ▁the ▁ 1 9 6 0 s , ▁the ▁complex ▁was ▁allowed ▁to ▁fall ▁into ▁dis rep air . ▁Also ▁during ▁the ▁ 1 9 6 0 s , ▁some ▁sections ▁of ▁the ▁complex ▁began ▁to ▁be ▁left ▁un occup ied ▁and ▁others ▁burn ed ▁down ▁including ▁an ▁engine ▁block .