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Mechanical Code Program


OMSC adoption process

July 1 | The code adoption process for the next edition of the OMSC has started.
Follow the code adoption process

OMSC - Refrigerant Standards Statewide Alternate Method 21-01

A new statewide alternate method to the Oregon Mechanical Specialty Code has been issued for the use of new and low global-warming-potential refrigerants.

View the new statewide alternate method

Adopted codes and standards

The Oregon Mechanical Building Code (OMSC) establishes the minimum requirements for the design, installation, alteration, and inspection of mechanical systems that are permanently installed and utilized to provide control of environmental conditions and related processes within buildings.

2019 Oregon Mechanical Specialty Code (OMSC)
Effective Oct. 1, 2019

Code adoption resources

The 2019 OMSC is based on the 2018 International Mechanical Code (IMC). The fuel gas provisions of Appendix C are based on the 2018 International Fuel Gas Code (IFGC).

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