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SUPPORTS
PLATE AND WALL SUPPORT
Ventilated Anchor Plate (APV)
Anchor Supports are designed to provide support to vertical sections
and provide fixed-point support for horizontal sections. See Figure 29.
NOTE: Rings installed at 90° to plates.
Figure 29: - Ventilated Anchor Plate for Combustible material
The Plate Support must be attached to the building structure or supported
with rigid structural members. See Table 3 for maximum supported height.
For maximum support, the entire perimeter of the Plate Support must be
attached to structural framing. Structural members are supplied by the
installer. See Figure 30 and 31.
Figure 30: - Ventilated Anchor Plate on a Framework
Figure 31: Detail of the Ventilated Anchor Plate on a Framework.
Supported duct sections in a vertical position must be braced with
diagonal members or gussets to prevent deflection of the supported joint
as shown in Figure 31. "X" is a minimum of 30°.
Figure 32: - Anchor Plate Horizontal Bracing
Plate Supports are usually located adjacent to fittings, such as tees or
elbows, to protect fitting from expansion stresses. Table 8 shows Plate
Support, bracing and framework requirements for duct size ranges.
NOTE: If bracing is used, minimum "X" angle is 30°. If there is no
bracing, the framework must be attached to structural members
to provide equivalent rigidity.
17
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