SECTION 3 - HANDLING, STORAGE, AND INSTALLATIONPACE │ Installation & Assembly Manual
Issue Date: 07/03/2018
96
Form PA102.20-N1
Upper Duct Section Not
Continuous Through Roof
Sealant
Wood Nailer Norminal 2 X 4
Flashing Receiver
Lower Duct Section
Counterflashing
Curb
Base Flashing
Roofing Plies
Deck
Cant Strip
Upper
Section
LD06494a
Figure 158 - Duct Penetration of Roof
• Seal all penetrations into the ducts until water-
tight. Use a minimum of duct penetration when
attaching the supports.
• Provide adequate clearances between the ducts
and roof penetration openings.
• Duct systems should not be pressurized without
sufcient time for curing the sealant systems. Fol-
low the sealant manufacturer's recommendations
for applying the sealant.
• Support the ducts to avoid the transfer of duct
weight across exible connections as shown in
Figure 159 on page 96.
• Horizontal ducts should be pitched and provided
with drainage outlets.
• Install the ducts at a height sufcient to install
roong and ashing. Refer to the Duct Connection
Guidelines on page 94 for more information.
Figure 159 - Roof to Duct Installation (Horizontal
Discharge)
LD06337b
Duct
Seams And
Joint In Ducts
Roof
Curb
Front Or Rear
Discharge Unit
Duct Wall Penetrations
Roof Support
Elevate Bottom Of Duct
To Next Page
Loading...