Martin, Louis Adolphe, 1880- · New York, J.Wiley & Sons, Inc.: [etc. etc.] · leaf 91
the flanges is neglected andan average depth of flange is used, has approximatelythe dimensions shown in Fig. 38. The shear at A, the lower edge of the upper flange, is <la=fb%y(±A) =^j(-SS) (7 X .9) =^(10.4),at B, the upper edge of the web, qb- ^ (11-55) (7 X.9)= ^(i45-6), A 70 MECHANICS OF… … Fig. 38 to C, the variation may be represented by the curve tothe right of Fig. 38. This graph clearly shows that in beams of I-sectionthe material of the web may for practical calculations be STRESSES IN BEAMS 71 assumed to resist the whole shearing force. As already-noted, the normal stresses due…
Mechanics
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