The Part 9A. Mechanical Code rules were filed with the Secretary of State November 13, 2023, and become effective on March 12, 2024. The Part 9A Mechanical Code rules will adopt by reference the 2021 third printing edition of the International Mechanical Code with amendments, deletions, and additions deemed appropriate for use in Michigan.
Until the electronic and hard copies are available from the International Code Council (ICC), one can use the 2021 International Mechanical Code with the Part 9A Michigan Amendments for the 2021 Michigan Mechanical Code. The bureau will notify the public when the electronic and hard copy versions of each code are available for purchase and update the code books information on our website, which links to ICC for purchase. Below is an important change that has been made to the code.
Please contact the Mechanical Unit at bccmech@michigan.gov for questions concerning the 2021 Michigan Mechanical Code.
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