36
Earthcore Industries
MAGNUM Series Fireplace
36
ECO-STEEL/ECO-STEEL+ Metal Chimney Installation
3. Frame Openings:
From the ceiling, drop
a plumb bob to the center of the fireplace’s
flue outlet and mark the center point on the
ceiling. See
TABLE 1
below.
Mark appropriate cutting lines around
the center point. Cut a square hole in the
ceiling. Frame a level, square opening
centered over the hole that you have cut.
Frame openings at each floor level above
the fireplace.
(Figure 29)
These openings
are to hold the Firestop and Attic Insulation
Shield. Locate each opening by dropping
a plumb bob to the four corners of the
opening below. Maintain the 2 inch airspace
to combustibles.
4. Cut Roof Opening:
If penetrating through
the roof, determine and cut an opening
in the roof directly above the opening
below. The cut opening must be 4 inches
larger than the chimney’s outside diameter
to provide at least a 2 inch clearance all
around the chimney. The chimney must be
centered in this opening.
5.
Install Firestop:
A Firestop is required
on each floor penetration in multistory
installations. Building Codes require
a Firestop at every floor/ceiling level
including where the chimney penetrates
the attic.
Figure 29
shows a typical 2 story
installation with an attic.
NOTE:
A Firestop is not installed where the
chimney penetrates through the roof. The
Firestop is installed on the underside of the
ceiling/floor framing and secure in place
with nails or screws.
(Figure 29)
Frame Opening Dimensions
Diameter
Framing Dimensions
16” OD nominal
20” X 20”
Anchor
Plate
Masonry
Anchors
Iso-wool
Chimney
Section
Firestop
Chimney
Section
Tall Cone
Flashing
Storm
Collar
Chimney
Cap
20"
Chimney
Section
Firestop
Ceiling/
Floor
20"
FIGURE 29
TABLE 1
Ceiling/
Floor
20"
20"
