Skinner, Frank W. (Frank Woodward), 1858-1932 · New York, McGraw · leaf 72
6 x 6 x |-in. angles, one 29-ft. and one 40-ft. 14 X -j^g-in. cover plate, making a cross-section of about RAILROAD PLATE GIRDER SPANS 55 30 sq. in. gross and 25 sq. in. net. The top flange is made withtwo 6 X 6 X i in. top angles, two reversed 6 x 4 X |-in. bottomangles, and two 8 ^ x ^-in.… … Plan of Top. Base of Rail
Bridges
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