con crete ▁grade ▁ 5 0 / 2 0 ) ▁strength , ▁using ▁a ▁s lip form ▁system ▁in ▁a ▁continuous ▁operation . ▁ ▁The ▁pulling ▁force ▁in ▁the ▁main ▁susp ension ▁c ables ▁is ▁taken ▁up ▁by ▁large ▁gravity ▁anchor ages ▁located ▁at ▁both ▁ends ▁of ▁the ▁bridge . ▁They ▁are ▁massive ▁concrete ▁structures ▁deeply ▁se ated ▁on ▁bed rock ▁on ▁the ▁land side ▁of ▁T sing ▁Y i ▁and ▁Ma ▁W an ▁island . ▁The ▁total ▁weight ▁of ▁concrete ▁used ▁in ▁the ▁T sing ▁Y i ▁anch orage ▁is ▁ 2 0 0 , 0 0 0 ▁t onnes , ▁and ▁Ma ▁W an ▁An ch orage ▁has ▁ 2 5 0 , 0 0 0 ▁t onnes ▁of ▁concrete . ▁ ▁The ▁c ables ▁were ▁constructed ▁by ▁an ▁aer ial ▁spin ning ▁process . ▁The ▁process ▁involved ▁drawing ▁w ires ▁from ▁a ▁constant - t ension ▁supply , ▁and ▁pulling ▁loops ▁of ▁these ▁w ires ▁from ▁one ▁anch orage ▁to ▁the ▁other , ▁passing ▁through ▁a ▁ 5 0 0 - ton ne ▁cast - ir on ▁s addle ▁on ▁top ▁of ▁each ▁bridge ▁tower ▁se ating ▁the ▁cable . ▁A ▁total ▁of ▁ 7 0 , 0 0 0 ▁gal van ised ▁w ires ▁of ▁ ▁diameter ▁were ▁placed ▁and ▁adjust ed ▁to ▁form ▁the ▁two ▁ ▁diameter ▁main ▁c ables . ▁ ▁The ▁steel work ▁for ▁the ▁deck ▁structure ▁was ▁fabric ated ▁in ▁Britain ▁and ▁Japan . ▁After ▁delivery , ▁they ▁were ▁further ▁processed ▁and ▁assemble d ▁in