TM 5-809-3/NAVFAC DM-2.9/AFM 88-3, Chap. 3
(d) Determine the short term (live load) deflection, )ms, as follows:
Note. The shear and moment diagrams for the load case that produces maximum live load deflection are
shown in figure 8-9.
Where:
Note. Mmax was assumed to be located at the same point on the beam as determined from the dead load
analysis. This is an approximate method of determining the shear and moment diagrams, and is reasonably
accurate. The designer may decide to make another reasonable assumption or use a more accurate method
of analysis, but the difference in the results will be small.
Mse= 0.03(600)(12)2(12 in/ft) = 31,104 in-lb
Msi =0.079(600)(12)2(12 in/ft) = 81,907 in-lb
)mt = 0.018 in + 0.034 in = 0.052 in
(e) Determine the allowable lintel deflection, Aaiiow, and compare to the maximum lintel
deflection, )max = 0.30 in, as follows:
...Deflection O.K.
8-13
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