Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 568
rch bridge in No.4, the principle is about the same as in the truss,except that in the arch it is the abutments thatkeep the ends from spreading. If the arc of thearch bridge is less than a half-circle, the endswill tend to spread. If the arc is a complete half-circle, the ends will not spread, but… … SKETCHES TO ILLUSTRATE VARIOUS FORMS AND METHODS OF OPERATING OF PARTS OF BRIDGES AND ARCHES.These sketches are referred to by numbers in the accompanying article. ends apart; but such spreading is prevented bythe abutments. In No. 5 the weight on the endsis directly downward. No. 6 shows the…
Children's literature
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