e four girders forming a bridgefor two lines of railway is 489 tons : to this must be addedthe weight of platform, handrails, &c., 100 tons, making a totalof 589 tons. We have for calculation, therefore, the following dimen-sions : — 208 ADAPTATION OP MALLEABLE-IRON BEAMS OR GIRDERS Length of… … Ikl5i=t
Building, Iron and steel
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