18
Earthcore Industries
MAGNUM Series Fireplace
Supporting Floor System
The MAGNUM 28, 36, 42, and 48 Fireplaces are not rated
for installation on a combustible floor system unless used
in the
Fire-Lite Application (see Page 23).
Fireplaces
must be built upon a concrete support slab with no wood
underpinnings. Proper reinforced concrete support slab for
fireplace installations may include the following types:
1.
Slab on grade: standard residential, minimum four
inch (4”) thick, 2500 psi concrete foundation on properly
compacted fill. This type foundation can support Isokern
installations up to thirty feet (30’)* overall height without
additional structural support. (brick ledge installations not
included)
(Figure 5)
.
* Minimum height. See page 3 for specific models.
2.
Slab-on-grade foundations, thickened and reinforced: for
additional load carrying
(Figure 6)
.
3.
Off-grade slab on foundation walls and footings. Projects
with off-grade floor systems as well as upper story
installations require this type of support. When building
off-grade support slabs the code required hearth extension
substrate should be built as a continuation of the support
slab for the fireplace unit
(Figure 7)
. Supports for off grade
slabs must be concrete or steel and capable of supporting
the slab, Isokern unit and the chimney.
For multi-floor and back-to-back installations, proper
weight computation on an individual basis is required.
Consult a local structural engineer for load bearing
requirements.
IMPORTANT:
Foundations and footings must meet local
code and be approved by the local building authority. For any
foundation design and load requirements check with a local
structural engineer.
It is the responsibility of the General
Contractor to insure adequate foundations.
Fireplace weights* and “foot print” areas: The total fireplace
weight and footprint for each model listed below includes:
Fireplace pumice components only:
MAGNUM 28: 1040 lbs. @ 35.5” x 28” = 6.9 sq.ft.
MAGNUM 36: 1300 lbs. @ 43” x 28” = 8.4 sq.ft.
MAGNUM 42: 1420 lbs. @ 49” x 28” = 9.5 sq.ft.
MAGNUM 48: 1600 lbs. @ 53” x 28” = 10.3 sq.ft.
“Footprint” areas listed above are base plate dimensions
for each model and are exclusive of code required hearth
extension areas. See page 59 for hearth extension
dimensions.
NOTE:
Additional support slab area may be required at the
side or back of the MAGNUM unit to provide bearing for
structural supports to a DM offset chimney sequence. (See
pages 32-34
for offset chimney support requirements.)
FIGURE 5
FIGURE 6
FIGURE 7
