Installation Guide

8
3. Install Support: Slip the Support Box
,(Figure 5), into the framed opening. It must
extend at least 2 inches below the nished
ceiling. Level the Square Support Box and
nail it to the framing using at least two 8-penny
nails per side. The two Trim Frames are
positioned as shown, and screwed through
the ceiling and into the framing members with
(6) 1-1/4 inch long round-head wood screws.
(Figure 6). The bottom of the Round Support
must also be at least 2 inches below the
nished ceiling. Trim for the Support Boxes
is “U-shaped” . The trim pieces are adjusted
to accommodate the Square Support Box, and
screwed into the framing, using wood screws.
A completed Square Support Box installed in
a cathedral ceiling with the “U-shaped” trim is
also shown in Figure 6. Trim kits are available
in brass, to enhance the appearance of the
various Support Boxes and Trim Frames .
Where the chimney passes through additional
oors and ceilings, install Firestop Radiation
Shields. Where the chimney passes through
an attic, Firestop Radiation Shields and
Insulation Shields must be installed.
4. Frame Openings: Frame openings in
each ceiling or oor above the Support Box.
(Figure 7). These openings are to hold the
Firestop Radiation Shields and Attic Insulation
Shields. Locate each opening by dropping a
plumb bob to the four corners of the opening
below. Maintain the minimum clearances and
Figure 5
ROUND CEILING SUPPORT
SDP-RS
FLAT SUPPORT BOX
SDP-S
Figure 6
WOOD SCREW (6 REQ)
WOOD SCREW (8 REQ)
SUPPORT BOX IN
CATHEDRAL CEILING
WITH TRIM FRAME IN
PLACE
ROUND CEILING
SUPPORT WITH TRIM
PLATES IN PLACE
ATTIC
Figure 7
2 INCH MIN
CLEARANCE
INSIDE OF
ENCLOSURE
FRAMED
ENCLOSURE
MIN OF 2 INCHES
BELOW FINISHED
CEILING
SECOND STORY
CAP SDP-C
STORM COLLAR
SDP-SC
FLASHING
VENTILATED
SDP-SC
CHIMNEY SECTIONS
SDP-P
ATTIC INSULATION
SHIELD SDP-IS
FRAMED
OPENING
SQUARE CEILING SUPPORT
BOX SDP-SB OR ROUND
CEILING SUPPORT SDP-RS
CHIMNEY SECTIONS
SDP-P
FIRESTOP
RADIATION SHIELD
SDP-IS