A nominal 10 × 40 in concrete masonry beam built from lightweight CMU is
reinforced with two No. 5 Grade 60 bars for tension. The centroid of reinforce-
ment is located at 6 in. from the bottom of the beam (Fig. P4.7). The beam carries
a service live load of 1000 lb/ft in addition to its own weight over an effective
span of 15 ft 8 in. The grout weight is 140 lb/ft3. f ′ = 1500 psi. Check if the beam m
is adequate to carry the imposed loads.
9.63" (10" nominal)
9.63" (10" nominal)
40"
FIGURE P4.6
d = 34"
2#5
40"
FIGURE P4.7
d = 34"