45
Earthcore Industries
MAGNUM Series Fireplace
45
ECO-STEEL Metal Chimney Installation
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, and square
opening centered over the hole that you have cut. Frame
openings at each floor level above the fireplace
(Figure
51)
. 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" 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" larger
than the chimney’s outside diameter to provide at least
a 2" 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 51
shows a typical two-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 51)
.
6. Angle Support and Support Band:
Install a Support
TABLE 1. Frame Opening Dimensions
Diameter
Framing Dimensions
16” ID nominal
20” X 20”
Anchor
Plate
Masonry
Anchors
Isowool
Chimney
Section
Firestop
Chimney
Section
Tall Cone
Flashing
Storm
Collar
Chimney
Cap
20"
Ceiling/Floor
Chimney
Section
Firestop
Ceiling/Floor
20"
FIGURE 51
