What a rated assembly is
A fire-rated assembly is a tested combination of materials, such as studs, board, insulation, fasteners and sealants, that resists fire for a set period. It might be a corridor wall, a demising wall between tenants, a shaft, or a ceiling that protects the structure above.
Each assembly comes with details that must be followed. Board type, number of layers, joint treatment and the way the wall meets the floor and ceiling all matter. A wall that looks right but misses one detail may not perform as rated, and an inspector can reject it.
Firestopping and penetrations
The weak point in most rated walls is the holes. Pipes, conduit, cable trays and ductwork all pass through, and each opening needs approved firestopping or dampers. This is where self-performing helps most.
Our electricians and mechanical crew know where a rated wall sits and what is required at each penetration. They coordinate with our interior systems team so openings are sized correctly and sealed on the day the service is installed. That is easier than finding a gap later and tracing which subcontractor made it.
- Rated partitions, shaft walls and demising walls
- Fire-rated ceilings and soffits
- Firestopping at pipe, duct and cable penetrations
- Rated door frames and openings, coordinated with our doors crew
What to plan for
Rated assemblies are defined in the design and reviewed under the Alberta Building Code and the permit process. Changes after approval, even small ones like adding a new cable run, can require review. Tell your project manager early about future equipment or wall openings.
Inspection is a normal step. We plan holds so that rated walls can be reviewed before they are closed or painted over, and we keep records of what was installed.
Maintenance also matters after handover. Tenants who add wiring later should know that a penetration through a rated wall must be sealed again, and we are happy to advise.