Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 320
ce, or tubular. The only remark that need be here made onarched bridges is, that when cast iron was applied to the construction ofbridges, the chief strength of the material lying in its resistance to pres-sure, the piinciple of construction adopted was mainly the same as thatwhich governs the… … Fig. 139. The general principle of the construction of girder bridges is easilyexplained by considering a simple case, which is almost within every-bodys experience. Let us suppose we have a plank supported as in Fig. 139.The plank will by its own weight sink down in the centre, becomingcurved in…
Inventions
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