Isokern Standard 36 - Concrete Support

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The Fireplaces are not rated for installation on a combustible
oor system unless used in the Fire-Lite application. Fireplaces must be
built upon a concrete support slab with no wood underpinnings. Proper
reinforced concrete support slab for replace installations may include
the following types:
1. Slab on grade: standard residential, minimum four inch (4”) thick, 2500
psi concrete foundation on properly compacted ll. This type foundation
can support Isokern installations up to thirty feet (30’)* overall height
without additional structural support. (brick ledge installations not
included) (Figure 42)
* Minimum height. See page 3 for specic models.
2. Slab-on-grade foundations, thickened and reinforced: for additional
load carrying. (Figure 43)
3. Off-grade slab on foundation walls and footings
Projects with off-grade oor 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 replace unit. (Figure
44). Supports for off grade slabs must be concrete or steel and capable of
supporting the slab, Isokern unit and the chimney.
For multi-oor 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 replace weight and footprint for each model listed below
includes: Fireplace pumice components only:
A. Model Magnum 28: 1040 lbs. - 35.5” x 28” = 6.90 sf.
B. Model Magnum 36: 1300 lbs. - 43” x 28” = 8.36 sf.
C. Model Magnum 42: 1420 lbs. - 49” x 28” = 9.52 sf.
D. Model Magnum 48: 1600 lbs. - 53” x 28” = 10.3 sf.
A. Isokern Standard 36 - 1205 lbs. - 43” x 25 25” = 7.54 sq. ft.
B. Isokern Standard 42 - 1325 lbs. - 49” x 25.25” = 8.59 sq. ft.
C. Isokern Standard 46 - 1450 lbs. - 53” x 25.25” = 9.29 sq. ft.
*Totals are exclusive of any chimney components. See page 30 for
Isokern DM chimney component weights.
“Footprint” areas listed above are base plate dimensions
for each model and are exclusive of manufacturer’s required hearth
extension areas. See page 26 for hearth extension dimensions.
Note: Additional support slab area may be required at the side or back
of the replace unit to provide bearing for structural supports to a DM
offset chimney sequence. (See pages 33-35 for offset chimney support
requirements.)
Concrete Support
FIGURE 42
FIGURE 43
FIGURE 44