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Mechanical Code Program


Code adoption process begins

The process for adopting the next Oregon Mechanical Specialty Code (OMSC) started July 1, 2021. Code adoption information is posted on the OMSC adoption webpage.

Follow the 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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