Base Plate
Raised Platform
Standard Residential
Concrete Slab
On or Off-Grade
9
Raised and Flush Hearth Application:
For a raised hearth (floor of the fireplace elevated
above the room’s floor) then the Vent-Free base plate can be
set on a concrete block platform that is built up to the desired
raised hearth height on the concrete support slab.
When calculating raised hearth height, be sure to
allow for the three inch (3”) thick base plate plus the one and
one-half inch (1-1/2”) thick fire brick floor in addition to the
height of the concrete block platform.
For a “flush hearth” (fireplace floor flush with the
room’s floor) the base plate can be omitted from the assembly
and the firebox walls built directly on the concrete support
slab as long as there are no wood underpinnings. This makes
the fireplace finished fire brick floor approximately one and
one-half inches (1-1/2”) above the top of the concrete support
slab. For installation directly on a combustible floor, the base
plate must be used.
CMU used for base plate support should be rated
ASTM 90.
Assembly Instructions (cont.)
Summary of Contents for VF-36
Page 15: ...15 Notes ...