hilisemad olid juba terassillad. · Metalli omaduste uurimine, arvututeooria arenemine, tarindusviiside täiustumine lubas inseneridel hakata rajama suure sildeavaga sildasid. · 1850.a. rajati Britannia sild üle Menai väina. Selle talasilla kogupikkus oli 350m. (insenerid W.Fairbain ja R.Stephenson). · 1873-91.a. rajati Shotimaal algupärase konsoolsôrestikuga · Forthi sild; kolme 521m laiuse avaga ja kogupikkusega 2528 m, sõidutee kõrgus merepinnast oli 46m. · Euroopas rajati põhiliselt kaar- ja talasildu, Ameerikas olid levinumad rippsillad. Kõrghooned · 19.sajandi lôppu mahtus ka selline nähtus nagu kôrghooned. · Tähtis eeldus kôrghoonete ehitamiseks oli see, et võeti kasutusele metallkarkass. · Ameerika inseneri E.Ottise 1853.a. leiutas lifti, mis esialgu küll auru jôul töötas. · Progress ei piirdunud ainult hoonete kôrguse kasvuga,
floorless chambers filled with compressed air. The first major bridge of steel in France was the Viaur Viaduct (1902), a three-hinged steel arch of 721ft (220m) flanked by 311ft (95m) cantilevers. The crowning achievement of the material during the 19th century, however, was the mighty Forth Railway Bridge in Scotland (1890). Its design was motivated by the Tay Bridge disaster. About 54,000 tons of Siemens-Martin open-hearth steel were required for the 1710ft (521m) cantilever spans whose main compression struts of rolled steel plate were riveted into 12ft (4m) diameter tubes. Another authority on the effects of wind on structures was Gustav Eiffel, who conducted similar experiments in France prior to designing another of the world's great arch bridges, the 541ft (165m) Garabit Viaduct (1885) in the windy valleys of the Massif Central, though he held to wrought iron, not being convinced of the efficacy of the new material.
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