Control joints (CJ) for a CMU wall

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3 comments

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    Bankole Folorunso

    I would say #3, because it would involve cutting CMU in an inefficient way. It can be time, cost and labor intensive too I think.

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    David Grussgott

    20'8

    follows the CMU block module

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    Gang Chen

    The answer is c. 19’-8” because it is not set up per CMU block module and will require the cutting of CMU blocks and cost more money. The trick to set up the CJ-to-CJ dimension is if the feet is an odd number, then the inch must be 4”, such as 3’-4”, 15’-4”, etc. If the feet is an even number, then the inch much be 0” or 8”, such as 8’-0”, 12’-8”, etc.

    Gang Chen, Author, AIA, LEED AP BD+C (GreenExamEducation.com)

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