CaptiveAire DW - Vertical Support & Vertical Support Spacing

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Vertical Support & Vertical Support Spacing
Duct and chimney system(s) require supports along vertical runs. There are multiple vertical supports used
for duct and chimney system(s). Each support assembly is designed for a specific type of installation.
Review installation site before selecting supports. There are three different types of hardware supplied
depending on the type of wall that the duct and chimney is being supported on. There are three types of
wall construction; gypsum with wooden studs, gypsum with 25 gauge steel studs and concrete/masonry.
Each wall construction type requires different hardware to be used when installing the support assembly.
Refer to Table 6 for maximum vertical support spacing. Do not exceed this listed vertical spacing.
*Sizes 30” / 36” model 3Z only.
**Sizes 30” / 36” double wall vertical support spacing must be 5 feet when installed on gypsum
walls with 25 gauge steel studs.
Vertical support systems must be attached only to the building structure or supported with rigid
structural members. Refer to Table 6 for maximum support spacing. It is recommended that
vertical support systems are attached to block, concrete, or steel with clearance that is adequate
for installation and access.
Table 6 - Vertical Support Spacing
Diameter
(Inches)
3R, 3Z Duct Vertical Wall Support
Spacing (Feet)
3R, 3Z Duct Vertical Curb/Floor Support
Spacing (Feet)
8” 10’ 24’
10” 10’ 24’
12” 10’ 24’
14” 10’ 24’
16” 10’ 24’
18” 10’ 24’
20” 10’ 24’
22” 10’ 24’
24” 10’ 24’
30”* 10’** 20’
36”* 10’** 20’
Diameter
(Inches)
2R Wall Support Spacing (Feet)
2R Duct Vertical Curb/Floor Support
Spacing (Feet)
8” 20’ 24’
10” 20’ 24’
12” 20’ 24’
14” 20’ 24’
16” 20’ 24’
18” 18’ 24’
Diameter
(Inches)
2R Type HT Chimney Vertical Wall
Support Spacing (Feet)
2R Type HT Chimney Vertical Support/
Floor Support Spacing (Feet)
8” 20’ 24’
10” 20’ 24’
12” 20’ 24’
14” 20’ 24’
16” 20’ 24’