Planning Fire-Rated Interior Assemblies
Fire-rated walls and ceilings are systems. Studs, board type and layers, fasteners, joints, head details, penetrations and continuity must match the required design.
Identify the required assembly
The drawings and specifications should identify the applicable rating and assembly. Do not substitute components based only on appearance.
Coordinate penetrations early
Electrical, mechanical and plumbing penetrations can affect continuity. Their locations and required protection should be resolved before closure.
Document before board hides the work
Photos and inspection checkpoints help confirm backing, framing, services and continuity before assemblies are enclosed.
Common questions
Is fire-rated drywall enough to make a rated wall?
No. Rating applies to a complete assembly built to the applicable design, not to one product by itself.
Can a rated wall stop at a suspended ceiling?
That depends on the required design and construction documents. Some separations must continue to structure.
Who confirms the required rating?
The project drawings, specifications and responsible design or code professionals should establish the requirement.