In California seismic design categories D, E, and F, what is the maximum spacing allowed between horizontal reinforcement in grouted concrete masonry unit (CMU) walls?
Correct Answer
C) 48 inches on center
CBC Section 2103.13.4.1.2 specifies that horizontal reinforcement spacing in grouted masonry walls shall not exceed 48 inches on center in high seismic areas. This requirement ensures adequate lateral force resistance and ductility in masonry construction, which is critical for California's seismic conditions and helps prevent catastrophic failure during earthquakes.
Why This Is the Correct Answer
CBC Section 2103.13.4.1.2 specifies that horizontal reinforcement spacing in grouted masonry walls shall not exceed 48 inches on center in high seismic areas. This requirement ensures adequate lateral force resistance and ductility in masonry construction, which is critical for California's seismic conditions and helps prevent catastrophic failure during earthquakes.
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