▁was ▁created ▁by ▁pulling ▁ro pes ▁across ▁the ▁g orge ▁and ▁making ▁a ▁foot way ▁of ▁wire ▁ro pes ▁with ▁wood ▁pl anks ▁held ▁together ▁with ▁iron ▁ho ops . ▁This ▁was ▁used ▁by ▁the ▁workers ▁to ▁move ▁a ▁" tra v eller ", ▁consisting ▁of ▁a ▁light ▁frame ▁on ▁whe els , ▁to ▁transport ▁each ▁link ▁individually , ▁which ▁would ▁eventually ▁make ▁up ▁the ▁ch ains ▁supporting ▁the ▁bridge . ▁The ▁ch ains ▁are ▁anch ored ▁in ▁tap ering ▁t unn els , ▁ ▁long , ▁on ▁either ▁side ▁of ▁the ▁bridge ▁and ▁pl ugs ▁of ▁Staff ord shire ▁blue ▁brick ▁in filled ▁to ▁prevent ▁the ▁ch ains ▁being ▁pulled ▁out ▁of ▁the ▁nar ro wer ▁tunnel ▁mouth . ▁After ▁completion ▁of ▁the ▁ch ains , ▁vertical ▁susp ension ▁ro ds ▁were ▁hung ▁from ▁the ▁links ▁in ▁the ▁ch ains ▁and ▁large ▁g ird ers ▁hung ▁from ▁these . ▁The ▁g ird ers ▁on ▁either ▁side ▁then ▁support ▁the ▁deck , ▁which ▁is ▁ ▁higher ▁at ▁the ▁Cl if ton ▁end ▁than ▁at ▁Le igh ▁Wood s ▁so ▁that ▁it ▁gives ▁the ▁impression ▁of ▁being ▁horizontal . ▁The ▁strength ▁of ▁the ▁structure ▁was ▁tested ▁by ▁spread ing ▁ 5 0 0   tons ▁of ▁stone ▁over ▁the ▁bridge . ▁This ▁caused ▁it ▁to ▁sag ▁by ▁, ▁but ▁within ▁the ▁expected ▁toler ances . ▁During ▁this ▁time ▁a ▁tunnel ▁was ▁driven ▁through ▁the ▁rocks ▁on ▁the ▁Le igh ▁Wood s ▁side ▁beneath ▁the ▁bridge ▁to ▁carry ▁the ▁Br istol ▁Port ▁Railway ▁to ▁Av