▁but ▁Ch ale y ' s ▁system , ▁inspired ▁by ▁the ▁ideas ▁of ▁Louis ▁Vic at , ▁allowed ▁consider ably ▁longer ▁c ables ▁to ▁be ▁ere cted ▁at ▁less ▁cost . ▁ ▁He ▁built ▁the ▁Grand ▁Pont ▁Sus pend u ▁at ▁F rib ourg ▁in ▁ 1 8 3 4 , ▁a ▁world ▁record - bre aking ▁span ▁of ▁ 2 7 3 m , ▁only ▁over t aken ▁ 1 6 ▁years ▁later ▁by ▁Charles ▁El let ▁Jr .' s ▁ 3 0 8 m ▁span ▁W heel ing ▁Sus p ension ▁Bridge . ▁Ch ale y ▁had ▁previously ▁worked ▁with ▁Marc ▁Seg u in ' s ▁brother ▁Jules ▁on ▁the ▁Tar as con - Be au ca ire ▁Bridge ▁( 1 8 2 8 ) ▁and ▁also ▁the ▁Ch az ey - sur - A in ▁Bridge ▁( 1 8 2 9 ). ▁ ▁Ch ale y ▁first ▁presented ▁a ▁proposal ▁for ▁the ▁Grand ▁Pont ▁Sus pend u ▁in ▁February ▁ 1 8 3 0 , ▁and ▁was ▁awarded ▁the ▁contract ▁in ▁June ▁of ▁that ▁year . ▁His ▁estimated ▁cost ▁of ▁less ▁than ▁ 3 0 0 , 0 0 0 ▁flor ins ▁was ▁well ▁below ▁other ▁compet itors , ▁including ▁Guillaume ▁Henri ▁D uf our . ▁Ch ale y ' s ▁bridge ▁was ▁supported ▁on ▁four ▁main ▁c ables ▁( two ▁per ▁side ), ▁each ▁consisting ▁of ▁ 1 0 5 6 ▁w ires ▁each ▁ 3 . 0 8 mm ▁in ▁diameter . ▁It ▁carried ▁ 2 0 0