Skinner, Frank W. (Frank Woodward), 1858-1932 · New York, McGraw · leaf 349
ghtly so that the top flanges of the beams are in closecontact under pressure with the bottom flanges of the girdersand increase the rigidity of the structure. Thirty-two lines of 8-in. 30-lb. I-beams 12 in. apart, parallelwith the girders, are supported on the top flanges of the floor-beams and on… … FLATK GIRDER AQUEDUCT SPANS 333 the continuous bottom surface of the aqueduct, and the sides aremade with \-\v\. vertical plates about 3^- ft. wide, spliced by 2 X4-in. T-bars on the outside and stiffened by three equidistanthorizontal lines of inside 2 X 4-in. T-bars. The lower edges of
Bridges
Internet Archive · Boston Library Consortium · Public Domain Mark 1.0. Free to use for anything.
