Economics of bridgework, a sequel to Bridge engineering (1921)
Waddell, J. A. L. (John Alexander Low), 1854-1938 · New York, J. Wiley · leaf 218
an at which it pays to change from parallel chords tocurved or, more properlj speaking, polygonal chords, will vary with theclass of bridge; but it is seldom advisable to adopt the latter for spansunder two hundred feet. The greater the panel length the greater theHmit of span for parallel chords,… … Fig, O 5000 /OOOO /SOOO Jb/a/l. oej<^ /n /^oancfs perjL/nea/ /vofofG/rc^er 20a. Economic Depths of Plate-Girders witli Kiveted End-Connections. as to approach very closely the old pai-abolic trusses, in which the curveextends from end-pin to end-pin. In a large and inportant bridge over…
Bridges
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