M&G DuraVent DuraStack® - Manual (Page 21)

21
Figure 31
Figure 32
CraDLE Support (CS)
1. Cradle support is used to support and
guide the chimney in horizontal runs. It
consists of a cradle support and suspension
rod (by others).
2. The suspension rods must attached to the
structural members to provide rigidity.
3. Cradle support allows to stack two (or more)
horizontal chimney runs (See Figure 32).
4. Cradle support does not allow movement
for thermal expansion This support should be
used for low temperature application.
rooF BraCE (rB)
1. The roof brace is used to stabilize the
chimney where it extends more than 15’
above the roof.
2. It consists of one band (RB) and two braces
(supplied by the installer).
3. To minimize loads induced by thermal
expansion on braces and support, the
maximum distance between the last fixed
support and the band of the roof brace must
be reduced to 5’.
4. Begin by attaching the braces to the band
with supplied bolts and nuts. Next, install the
Figure 33
Rail
Trolley
Flexible Strap
2x Layer
(By others)
Thermal
Expansion
Direction
4"
Travel
Band
Rods (by other)
Cradle Support
1 ¼" Rigid
Galvalume Tube or
1½" x 3/16" angle
iron (by others)
5' Max
H
Fixed Support
120°