Publicité
Chase Clearances
All materials inside the chase and above the fireplace must be non-combustible or covered combustible only .
Clearance to Metal Framing
The minimum clearance to metal framing is ½" (13 mm) .
Metal Studs
Clearance to side stud: ½" (13 mm)
Clearance to Non-Combustible Back Wall: 2" (51 mm) min .
Wood Studs with Metal Header
Clearance to Non-Combustible Board (SIDES): ½" (13 mm) min .
Clearance to Non-Combustible Board (BACK WALL): 2" (51 mm) min .
Clearance to Covered Combustible Stud (WOOD): 2-½" (64 mm) min .
Clearance to sides and back covers - Non-combustible
The minimum clearance from the back and sides of the fireplace to any
non-combustible covered material (1/2"(13 mm) cement board or 5/8"
(16 mm) Type X drywall) is 2" (51 mm) . This clearance allows for proper
airflow .
Clearance to sides and back - Covered combustible
Combustible material at the back or sides of the fireplace, MUST be
covered with non-combustible material that is at least ½" thick .
Covered wood can be placed a minimum of 2" (51 mm) away (including
non-combustible covering) from the sides and back .
Example: A non-combustible cement board is placed 2" (51 mm) from
the back of the fireplace . The cement board used is ½" (13 mm) thick .
Combustible material can be used behind cement board as it is a total of
2 ½" (64 mm) away from the back of the fireplace and is covered with a
non-combustible material .
Clearance to Sides and Back - Combustible
Minimum clearance to combustible material at the back or sides of the
fireplace, below the non-combustible line is ½" (13 mm)from sides, and
2" (51 mm) over covered combustibles . Please note this does not include
minimum clearance directly above the fireplace inside the chase .
WARNING
!
FRONT VIEW
½"
½"
1" 1"
SIDE VIEW
2"
2 ½"
2 ½"
44
Publicité
