2"
6"
4"
2"
BEARING
2"
6"
WOOD (FLAMMABLE)
SHEATHING
MIN. CLEARANCE
MIN. CLEARANCE
BRICK
VENEER
WOOD (FLAMMABLE)
SHEATHING
MASONRY VENEER
4x6 STEEL L
MASONRY BEYOND
AIR SPA
CE
MORTAR JOINT
24
Masonry Veneer Construction Details
Brick, stone or other masonry veneer finished fronts to
STANDARD fireplaces are possible. Special attention is required
with regards to:
(1) the placement of the proposed masonry veneer facing and its
interface with the STANDARD fire brick lining, and
(2) Clearance to combustible framing and sheathing from any
steel “L” support used in the masonry veneer around the front of
the STANDARD unit behind the veneer facing.
Any proposed brick, stone or other masonry veneer
facing must have sufficient foundation to support the full weight
of the veneer work. This may require review by a local structural
engineer prior to construction.
The veneer facing, when installed, must present a tight
seal with the leading edge - the room edge - of the STANDARD
fire brick lining at the sides of the STANDARD firebox opening.
(Figure 37)
A steel “L” will need to span the top of the finished
fireplace opening to carry the masonry veneer as it spans over the
STANDARD firebox opening. (Figures 36-38)
By code requirement this steel “L” must have a mini-
mum four inch (4”) end bearing. This bearing surface area shall
be provided in the veneer work. (Figure 39) It is important that
the steel “L” is set tight against the STANDARD’s damper beam
front and set in a mud joint to avoid creating a “false chimney”
between the back of the steel “L” and the STANDARD’s damper
beam front. (Figure 40)
Steel “L” or “angle” used to support masonry veneer
as it spans the STANDARD’s firebox opening must, in all
cases, have a two inch (2”) minimum clearance to all combus
-
tible materials. The vertical leg of the steel “L” cannot exceed
six inches (6”) in height.
Note:
Properly placed combustible sheathing is kept a mini-
mum of eight inches (8”) away from the STANDARD firebox
opening sides and top.
Important:
Combustible framing members, normally set at
one and one-half inch (1-1/2”) clearance to the sides of the
STANDARD firebox must be moved to at least two inch (2”)
clearance to the firebox sidewalls to maintain minimum two
inch (2”) clearance to the steel “L” to avoid a potential fire
hazard.
Moving framing members two inches (2”) away
from the firebox side walls will maintain the minimum re
-
quired two inch (2”) clearance from the steel “L” and, at the
same time allow full four inch (4”) end bearing required for
the steel “L”. (Figure 39)
FIGURE 40
FIGURE 39
