TM 5-809-3/NAVFAC DM-2.9/AFM 88-3, Chap. 3
actual length less the 8-inch distance from the centroid of the two end bars to the end of the pier; so dcB =
2*-8".
Shear Load
Lateral force, Vc, to Pier C = 24% of 10k
Vc = 0.24 10k = 2400 lbs.
Shear stress in pier C, fvC, is determined as follows:
The allowable shear stress, Fvm, will be determined by equation 7-1 as follows (assume pier fixed top and
bottom):
Therefore;
But shall not exceed: 80 - 45[M/(VdCv)]
Fvm = 80 - 45(0.70) = 48.5 psi; thus Fvm = 40.4 psi
fvC = 7.9 psi < Fvm = 40.4 psi 1.33 = 53.7 psi
7-16
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