18
8” Metal Base (MFP-63)
The MFP-63 Mason-Lite Metal Base (MFPB63) ensures the
minimum
eight inch clearance
above combustible flooring is
maintained.
A layer of 1/2” minimum Concrete Board is required on top
of the platform and 1” thick fiberglass blanket below as shown
in Figure 24.
Figure 24
MFP-63: 8” Metal Base Assembly
Place 1” Fiberglass
Insulation Blanket
under platform.
Place 1/2”
cement board on
top of platform.
May be a single
piece or two
halves as shown.
Hearth Ember Shields
26ga. galvanized
Anchor Bracket All-Thread Rods are secured to the
bottom flange
of the Metal Base with eight (8) flat washers (2”OD x 9/16”ID x
0.10”) and eight (8) 1/2-13 UNC Nuts.
Four (4) All-Thread Rods are secured to
the
top flange
of the Metal Base with eight
(8) flat washers (2”OD x 9/16”ID x 0.10”)
and eight (8) 1/2-13 UNC Nuts.
28”
67”
▲
!
IMPORTANT:
Remember to tighten up nuts below the floor after fireplace
installation in order to take up any slack in the threads.
Hearth Ember Shields:
Metal safety stripping is required between the front of the
Fireplace Hearth and Hearth Extension (not supplied). A 26
gauge galvanized 4” wide metal strip can be used. The length
needs to extend 2 inches beyond each side of the fireplace
opening. If two strips are used, make sure they overlap at
least two inches in the middle. The strip is placed about 2” into
the underside of the platform at the front.
Note:
When using an on-site constructed hearth extension,
you may use a sand-cement grout between the hearth and
extension instead.
6” Metal Base (MFP-33/39/44/49)
The Mason-Lite Metal Base ensures the minimum
six inch
clearance
above combustible flooring is maintained.
6” Metal Bases
Model
P/N
MFP-33
MFPB33
MFP-39
MFPB39
MFP-44
MFPB44
MFP-49
MFPB49
Figure 25 MFP-33/39/44/49: 6” Metal Base Assembly
Anchor Bracket All-Thread Rods are secured to the
bottom flange
of the Metal Base with eight (8) flat washers (2”OD x 9/16”ID x
0.10”) and eight (8) 1/2-13 UNC Nuts.
Place Cement
Board on top of
platform.
Place 1” thick
Fiberglass
Blanket under
Platform
26 ga. galv.
Hearth
Ember
Shields
Four (4) All-Thread Rods are secured to the
top flange
of the Metal Base with eight (8) flat washers (2”OD x
9/16”ID x 0.10”) and eight (8) 1/2”-13 UNC Nuts.
A1
A2
A layer of 1/2” minimum Concrete Board is required on the
top and mid-section of the Metal Base as shown in Figure 25.
The required sizes are shown in the following table:
1/2” Thick Cement Board Dimensions
Model
A1
A2
B1
B2
MFP-33
37”
28”
30”
23”
MFP-39
43”
28”
36”
23”
MFP-44
48”
28”
41”
23”
MFP-49
53”
28”
46”
23”
Note: The insulation (concrete) board chosen must meet a
thermal conductivity rating ≥ 0.4 Btu-in/hr-ft²-F°.
Combustible Floor Installations
