44
Hearth Extensions
All MAGNUM fireplaces shall have hearth
extensions of brick, concrete, stone, tile or other code
approved non-combustible material. Suitable hearth
extension material for the MAGNUM Series fireplace
shall be placed on the hearth extension’s non-combustible
44
Clearance to Combustible Trim
substrate and must extend to at least thirty inches (30”)
in front of the fireplace’s finished opening and must
extend to at least twelve inches (12”) beyond the sides
of the finished fireplace opening.
(Figure 46 & 47)
WARNING:
The non-combustible hearth extension, by
code, must sit on non-combustible substrate which shall
have no wood underpinnings.
This means that off-grade wood floor systems shall
be constructed in such a way that all wood floor joists
and subflooring shall stop thirty inches (30”) out from the
front of the MAGNUM firebox.
(Figure 46)
Mantle and Mantle Shelf Clearances
MAGNUM Series fireplaces are subject to the
same building code safety clearances to combustible
trim as with any radiant heat fireplace.
All combustible trim shall be kept at least nine inches
(9”) from the finished fireplace opening. Combustible
trim located along the sides of the fireplace opening,
which project more than one and one-half inches
(1 1/2”) from the face of the fireplace, shall have
additional clearance from the nine inches (9”) equal to the
projection. Combustible projecting mantles up to twelve
inches (12”) of projection - shall not be placed less than
twenty four inches (24”) from the top of the fireplace
opening. Combustible mantles which project more than
twelve inches (12”) from the face of the fireplace, shall
have additional clearance from the twenty four inches
(24”) equal to the projection.
NOTE:
The local authority having jurisdiction may require
greater clearances for projection combustible mantle
shelves. Be sure to check local building codes regarding
required clearances to projecting combustible mantles.
Adjoining Walls
Side walls and walls to rooms adjoining the
MAGNUM Series fireplace installations cannot be
closer than forty eight inches (48”) to the finished
fireplace opening.
(Figure 47)
NOTE:
“Clearance to Combustible Trim” are those
distances required to ensure that a fireplace mantle or
facing will not catch fire. In most cases the distances
should also be adequate to prevent any discoloration or
warping due to heat. However each installation presents
a unique and completely different set of circumstances
involving many variables.These include paint or finish
composition, previous exposure to heat, methods and
quality of construction, air flow patterns, etc. Because
of these variables, the manufacturer does not guarantee
that heat warping or discoloration will never occur.
24”
12"
30"
12
”
COMBUSTIBLE
MANTLE SHELF
30” HEARTH
EXTENSION
COMBUSTIBLE
FLOOR SYSTEM
ADJOINING
ROOM WALL
HEARTH
EXTENSION
9”
3”
48”
FIGURE 46
FIGURE47
Earthcore Industries
MAGNUM Series Fireplace
