TM 5-809-3/NAVFAC DM-2.9/AFM 88-3, Chap. 3
Asb = 0.0027(7.62)(20.62) = 0.424 in2
(c) The minimum reinforcing steel required above any wall opening is 1-#4 bar, As = 0.20 in2.
As = 0.20 in2 < Asb = 0.424 in2
Try 2-#4 bars (As = 0.40 in2) as shown in figure 8-5.
(d) The masonry resisting moment, Mrm, is determined as follows:
Where:
And:
...O.K.
(e) The reinforcing steel resisting moment, Mrs, is determined as follows:
Mrs = 14,945 ft-lb > Mmax = 13,814 ft-lb
...Flexure O.K.
8-8
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