r bridge be obtained. constitutes two arched trusses, which will resist de- With extreme ranges of temperature, it is calculated This question was delegated by the Secretary of War formation from strains to considerable extent. that the center of the cables will rise and fall through to the Board… … nearly three and one-half times this amount. The sus- by law. Both piers come inside of this line, so that the legal channel of the river is not to be interfered with. pended framework is to be made as rigid as possible. DOUBLE CABLE ANCHORAGE AND ANCHORAGE (Continued on page 323.) The structure is…
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