in steel—in fact, at less than one-third of the cost. On the other hand, even if we allow 50 pounds per square inch tension in the con- crete and 16,000 pounds in the steel, it requires only 0.31 per cent of steel to furnish the same strength as the concrete, which shows that, no matter what may be… … Pig. 3.—A Reinforced Concrete Pier for Railway be obtained from Fig. 3, which is an isometrical pro- Traffic. jection of a portion of a pier strong enough to carry the heaviest railway traffic. The disposition of the is best exemplified by a reference to Pig. 1. There Fig. 6.—Expanded Metal. steel…
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