Mechanical · IMC 2021 §602.3
Stud Cavity and Joist Space Return Plenums
Sections of an interior stud cavity and a joist bay used as a return plenum, fireblocked and limited to one floor level; not for supply air, rated assemblies or outside walls.. Referenced to IMC 2021 §602.3.
The full text is for BuildSpec members
Read the complete section, search across every adopted code, run the calculators and ask Copilot — free for 14 days, no card required.
- The annotated detail diagram with dimension callouts
- The code section it illustrates, in full
- Related diagrams in the same category
- Download and insert into a project
No card required. After the 14-day trial, plans start at $29/mo.
Our previews are real data — live counts, no placeholders. We publish our error log →