IMC 311 connects the mechanical set to roof-level life-safety coordination. Approved smoke and heat vents are required in the roofs of one-story buildings where the International Fire Code requires them.
Plain-English Summary
The IMC does not create the full smoke/heat vent trigger by itself. It points to the International Fire Code for when vents are required and how they are designed and installed.
Mechanical Coordination Point
Mechanical equipment, duct routing, roof curbs, exhaust fans, intakes, photovoltaic layouts, and roof access paths can all collide with smoke and heat vent layouts. Coordinate early before roof plans become fixed.
Permit Proof Chain
Building use and storage arrangement -> IFC smoke/heat vent trigger -> vent layout and area -> roof coordination -> mechanical equipment clearances -> smoke-control or exhaust conflicts -> access/maintenance path -> fire-code document reference.
Masterbuild QA Lens
Treat smoke and heat vents as a roof coordination item. The mechanical design may not own the vents, but mechanical equipment can block, crowd, or conflict with them.
Drawing / Submittal Check
Overlay the roof mechanical plan with the architectural/fire-code roof vent layout. Verify clearances, access, equipment curbs, intakes/exhaust discharges, structural openings, and any smoke-control notes.
When To Escalate
Escalate warehouse, storage, high-piled storage, manufacturing, and one-story buildings where the fire-code package may require vents or smoke-control features outside the mechanical designer's normal scope.