d design gives 1/4 d asthe limiting value of the thickness of the flange. This beam con- 16 forms to the above as d is 80 inches and tn is 22 inches. Ifthe flange is made too thin in comparison with the width of theweb, the shear will be greater along the lines a—a and c-c thanalong the line a—c.… … Table IV.APPROXIMATE PROPORTIONS Actual Limit d 4.4b = <4V t 0.28d > 0.25d w 0.23t <3t Fig. 5.Cross—sect ionShowing Proportions. Art. 4. The Floor.Consider a transverse section one foot wide along the centerline. It and the girders are of monolithic construction and so willneed to be…
Bridges · Concrete bridges · Iron and steel bridges · Theses
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