▁of ▁the ▁W ye ▁Bridge , ▁a ▁steel ▁box ▁gir der ▁cable - st ay ed ▁bridge ▁and ▁part ▁of ▁the ▁M 4 8 ▁Se vern ▁crossing . ▁Since ▁then ▁he ▁has ▁directed ▁several ▁other ▁similar ▁projects ▁involving ▁strength ening ▁of ▁such ▁structures , ▁including ▁the ▁Er sk ine ▁Bridge ▁in ▁Scotland ▁and ▁the ▁West ▁Gate ▁Bridge ▁in ▁Australia . ▁His ▁other ▁work ▁on ▁major ▁long ▁span ▁brid ges ▁includes ▁the ▁independent ▁design ▁checks ▁and ▁investig ations ▁for ▁the ▁T sing ▁Ma ▁Bridge , ▁Kap ▁Sh ui ▁Mun ▁Bridge ▁and ▁T ing ▁K au ▁Bridge , ▁all ▁in ▁Hong ▁Kong . ▁He ▁was ▁appointed ▁as ▁special ▁ad visor ▁to ▁the ▁client ▁for ▁the ▁longest ▁span ▁of ▁them ▁all , ▁the ▁Stra it ▁of ▁Mess ina ▁Bridge ▁in ▁Italy , ▁which ▁when ▁built ▁will ▁have ▁a ▁main ▁span ▁of ▁ 3 , 3 0 0 m . ▁ ▁F irth ▁led ▁the ▁team ▁which ▁won ▁the ▁Po ole ▁Har bour ▁Cross ing ▁bridge ▁design ▁competition ▁in ▁ 1 9 9 7 , ▁working ▁with ▁Dan ish ▁architect s ▁D iss ing + We it ling , ▁and ▁has ▁subsequently ▁won ▁many ▁other ▁bridge ▁design ▁compet itions . ▁These ▁include ▁Lock me adow ▁Bridge ▁in ▁Ma id stone , ▁the ▁Bridge ▁of ▁Asp iration ▁for ▁the ▁Royal ▁Bal let ▁School ▁in ▁London , ▁the ▁River ▁O ise ▁bridge ▁in ▁Com pi èg ne , ▁France , ▁the ▁Pont ▁Sch uman ▁in ▁Lyon , ▁France , ▁and ▁Ind er hav ns bro en ▁in ▁C open