AL Masonry Practice Questions - Alabama Masonry Contractor Examination Exam

On elevation drawings, a note "CJ @ 20'-0" o.c. max" in a long CMU wall most likely indicates:

Ceiling joists at 20 feet Control joints at a maximum spacing of 20 feet on center Corner jambs only at 20 feet height Concrete jacket thickness of 20 inches

Correct Answer:

Control joints at a maximum spacing of 20 feet on center

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