Framing Construction - Osburn OB04010K Installation And Operation Manual

6.3.7 Framing construction

6.3.7.1 Framing
The construction of the framing, facing, and mantel must be in accordance with the standards and the
following instructions:
Frame the sides and back of the fireplace using 2" × 3" (5 cm x 8 cm) or heavier lumber. However, the front
studs as well as headers on top of the fireplace must be of a depth no more than the depth of the top
standoffs.
Frame the fireplace with vertical studs at the sides of the fireplace running from floor to ceiling. Position the
studs back from the front edge of the fireplace, a space the thickness of the facing material so that the
facing can be installed flush with the fireplace facing. Frame headers between the vertical studs only as
follows:
− Place the front facing headers in 2" × 3" or of a depth no more than the depth of the top standoffs.
Do not put wood or any material within the area above the fireplace.
− Place headers only as required to support the facing and mantel.
• DO NOT PACK REQUIRED AIR SPACES WITH INSULATION OR OTHER MATERIAL.
• THE FIREPLACE MUST NOT BE IN CONTACT WITH ANY INSULATION OR LOOSE FILLING MATERIAL.
COVER THE INSULATION WITH DRYWALL PANELS AROUND THE FIREPLACE.
• COMBUSTIBLE FRAMING MATERIAL CANNOT BE USED IN THE SPACE DIRECTLY ABOVE THE
FIREPLACE. THIS AREA MUST REMAIN EMPTY FOR A HEIGHT OF 84" (2.13 M) MEASURED FROM THE
BASE OF THE FIREPLACE.
HORIZON – Installation and Operation Manual
WARNING
LEGEND
Combustible material allowed in this area
Non-combustible material only in this area
MESURES
E 50 3/4" (128,8 cm)
F 26 7/8" (68,3 cm)
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