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HEAVY DUTY WALL SUPPORT (WSHD)
When attached to a non-combustible wall with brackets and struts, a Heavy Duty
Wall Support makes up a fixed-point (See Figure 47a). The clamp rings are installed
with the splits 90° apart so that they support each other. The notches in the clamp
rings are aligned with the draw screws of the flange band. The Heavy Duty Wall Sup-
port Assembly is bolted together with provided hardware. It is made with adjustable
struts, which allows a variable clearance from the non-combustible wall to the outer
casing.
The minimum clearance varies with the size of the wall support, but is between 2" and
2 ½" (based on the angle shape of the Full Angle Ring (FAR). See Figure 47b
The maximum clearance for all sizes is around 10". See Figure 47c
WARNING: Do not attach Wall Support to combustible construction.
NOTE: Wrap duct joint with insulation before attaching half closure band.
Figure 47a- Wall Support (WSHD)
Figure 47b - Minimum
Adjustment
HEAVY DUTY WALLGUIDE (WGHD)
The Heavy Duty Wall Guide is designed to complement the Heavy Duty Wall Support
(See Figure 48). Placed around the outer wall of the section, it used as a lateral
guide to prevent flexing due to lateral loading. The proper location for the WGHD is
immediately below the Half Outer Band (DBSE) near the duct joint. The outer band
must be able to move away from the Heavy Duty Wall Guide when thermal expansion
occurs. The Heavy Duty Wall Guide is bolted together with hardware provided to form
a rigid assembly.
NOTE: Seal joint with S-375 sealant above and below support if exposed to weather.
NOTE: The wall guide may be attached to combustible construction. Maintain proper
clearances.
22
Figure 47c - Maximum
Adjustment
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Small Wall Bracket
Strut
Strut Bracket
Wall Bracket
Figure 48 - (WGHD) Minimum Adjustment
HEAVY DUTY FLOOR GUIDE (FGHD)
A Heavy Duty Floor Guide is similar in function to a Heavy Duty Wall Guide or Full Angle
Ring, but is modified specifically for use at floor penetrations. The angle brackets and
straps hold the FGHD centered in floor penetration. Refer to the Table 2: Opening in
Floor / Wall / Roof on page 4 for the value of "X" on the Figure 49.
NOTE:
May be attached to combustible construction
Angle Brackets
Full Angle Rings
(FAR)
Straps
Floor
Figure 49 - Heavy Duty Floor Guide (FGHD)
FULL ANGLE RING (FAR)
A Full Angle Ring is used as a guide to prevent the duct from flexing due to lateral
loading. The angle ring is split for ease of installation. It is 1/8" larger inside diameter
than the outside diameter of the duct to allow movement of the duct inside the ring.
Figure 50- Full Angle Ring (FAR)
HALF ANGLE RING (HAR)
A Half Angle Ring is used as a saddle in horizontal or sloped runs.
Figure 51- Half Angle Ring (HAR)
Full Angle Ring
"X"
"X"
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