Page 435 - Design of Reinforced Masonry Structures

WALLS UNDER AXIAL AND TRANSVERSE LOADS 6.85

6.3 A nominal 8-in-wide concrete masonry wall is reinforced with No. 6 Grade 60 bars
placed vertically at 32 in. center-to-center (Fig. P6.3). The masonry is running bond
2
and ′ =f 1500 lb/in. . Calculate the moment strength of wall which is subjected to
m
out-of-plane loads.
P

Roof
Parapet

Lateral loads Ledger
beam
Wind ar
seismic
8" Nominal h
CMU wall

FIGURE P6.3

6.4 A nominal 8-in.-wide concrete masonry wall is reinforced with No. 6 Grade 60 bars
placed vertically at 16 in. center-to-center (Fig. P6.4). It carries a roof dead
load of 400 lb/ft and live load of 250 lb/ft. The masonry is in running bond and
2
f m ′ = 1500 lb/in. . Calculate the moment strength of the wall which is subjected
to out-of-plane loads.
D = 400 lb/ft
Lr = 250 lb/ft
e = 4"

Roof
Parapet

Ledger beam
Lateral loads
8" nominal
Wind or CMU wall
seismic
# 6 @ 16" o.c. h
vertical bars

FIGURE P6.4