27
Firestop Radiation Shield
A Firestop Radiation Shield is required in multi-story
installations at each floor penetration above that where the
Support Box is located (
Figure 58
).
Figure 58
Existing
Ceiling
Frame
Firestop
Spacer
Eight #8 x 3/4”
wood screws
Firestop Spacer with Living Space Above Ceiling
Firestop Radiation Shields also provide complete separation
from one floor space to another or attic space as required
by most codes. When the double wall pipe passes through
a framed opening into an attic space, the Firestop must be
placed into an attic floor as shown in
Figure 59.
.
Figure 59
Existing
Ceiling
Frame
Firestop
Spacer
Eight #8 x 3/4”
wood screws
Firestop Spacer with Attic Space Above Ceiling
Follow your chimney manufacturer’s instructions on specific
guidelines pertaining to their chimney and Firestop Radiation
Shield installation instructions.
Mason-Lite Firebrick Liners
Custom Firebrick Lining
WARNING:
DO NOT OPERATE FIREPLACE
WITHOUT FIREBRICK LINING. Doing so will void all
warranties and may cause a hazardous condition.
•
Custom
Firebrick Lining is not supplied by Masonry Fireplace
Industries (MFI). There is, however, the option of
Modular
Prefabricated Panels
that can be obtained from MFI. See
exploded parts page for details.
•
If Custom Firebrick Lining is desired, it is required that
the brick be at least 1-1/8” inch thick and must be rated
ASTM-C1261. Important: Allow at least 1/4 inch
clearance around firebrick hearth to allow for heat
expansion otherwise your firebrick may crack (see
Figure 60)
.
•
The pattern for the firebrick lining is exclusively your choice.
Before you install the lining, remember to consider any
holes your contractor may need to drill for gas, electrical or
combustion air kit access holes.
•
Please use a certified mason to lay-in the brick. He will follow
the proper instructions from the fireplace liner manufacturer
and also understand the type of adhesive or cement he is
to use.
•
Make sure the fireplace is installed with the finished firebrick
floor of the fireplace so that it is
at least 11” (eleven inches)
above the combustible floor system.
•
Disclaimer: Masonry Fireplace Industries wishes to express
that as the manufacturer of Mason-Lite Fireplaces, they
cannot take any liability or responsibility for the way the
firebrick or the firebrick mortar performs. It is not unusual in
the course of the life of the firebrick, or the firebrick mortar,
for heat stress cracks to appear. MFI cannot be responsible
for this and other wear and tear to the firebrick and mortar.
Maintain 1/4 inch
gap all around
Firebrick Hearth
Figure 60
1/4 inch
Area behind
Rear Firebrick
Liner Panel can
remain empty
Figure 61
1/4 inch
Modular Firebrick Lining
If using our Mason-Lite Firebrick Liners, use the extra mortar
we supply. Install Hearth Liner first.
IMPORTANT:
Maintain 1/4 inch clearance around hearth
to allow for heat expansion. Failure to do so may cause
cracks in your firebrick hearth!.
Next, install the rear and sides last. Consider if brackets
for grates will be required also if pre-drilling is required for
gaslines, electrical or if the outside combustion air kit is to be
installed.
The rear Liner Panel is straight from the bottom to