/ Hub · IMC Chapter 6 · Duct systems
A damper symbol is not a protection strategy.
IMC Chapter 6 is where ceiling space, shafts, and rated assemblies either coordinate or become RFIs. Construction standard, plenum use, insulation, and 607 damper basis have to be on the sheet — not in a spec nobody opens at inspection.
Open the 607 damper pathfinder
What the drawings should identify
- Duct class, pressure, and construction standard (SMACNA / listed system)
- Where the building is used as a plenum — and where it must not be
- Flexible duct limits: length, support, and where flex is simply not allowed
- Insulation location (inside vs outside, conditioned vs unconditioned, Florida moisture)
- Fire and smoke damper type, listing, access, and the wall/floor rating being protected
- Coastal / salt-exposure durability on outdoor and intake ducts
607 as a typical detail copied onto every penetration
Each rated crossing needs assembly type, damper basis, listing, access, and any smoke-control interface. A typical that says “F/S damper where required” is a comment magnet. See IMC 607 Part 1.
Daily Code Talk
- Chapter 6 kickoff
- IMC 602 plenums hub
- IMC 603 construction hub
- IMC 604 insulation hub
- IMC 605 air filters
- IMC 608 balancing
- IMC 606 duct smoke detection
- IMC 602 plenums (DCT)
- IMC 603 construction
- Chapter 6 Duct Systems Field Guide
Send the ceiling and the rated walls
Architectural reflected-ceiling and rated-assembly plans plus the current M-sheets. Masterbuild will say which crossings are actually coordinated.
Send Project Background+1 (786) 398-6940 · osmany.portal@masterbuildconsulting.com
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