When using the optional ASHRAE 90.1-2019 code compliance method, see amendment in Statewide Alternate Method (SAM) 21-02, effective October 1, 2021 (opens as PDF):
If you are designing a gymnasium, big-box retail, or one of several other building types, you can still utilize integral-insulated exposed single-wythe concrete masonry (CMU) walls for code compliance. This cost-effective wall system remains a prescriptive path design option in the latest Washington and Oregon energy codes.
Click below to view the SAM 19-01 – Single-wythe CMU mass wall exception, Chapter 4 (opens as PDF).
Modifies the grout pour height limit requiring cleanouts. Also allows exceptions with approved construction procedures and optional cleanout dimensions. Please click here to view the Oregon Structural Specialty Code, Masonry online (opens as PDF).