Detail B
Dampers Supported By A Ceiling Grid System
Lay-In Diffuser Applications
Lay-In Diffuser
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grid system.
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2, Paragraph 4).
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Lay-In Diffuser With Steel Duct Drop
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into exposed Tee bar grid system.
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and steel duct drop (See Page 2, Paragraph 4) may
be satisfied as follows:
Figure 2
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it shall be fastened to the diffuser neck with a steel
clamp or #16 SWG minimum wire.
NOTE: (1) The flexible air duct shall not rest on the back
surface of the ceiling grid or panels (provide a minimum
of 4 in. [102mm] clearance). (2) The flexible air duct shall
not interfere with the closing of the ceiling damper.
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Figure 1.
1.
Ceiling radiation damper may be connected
directly to the diffuser neck and then the duct
drop connected to the damper (see Detail B,
Figure 2).
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Figure 2.
Figure 1
Ceiling
Radiation
Damper
Thermal
Blanket
9 3/4 in.
(248mm)
Maximum
Tee Bar
Tee Bar
Lay-in Diffuser
Lay-in Diffuser
All hanger wires
must be vertical (not
splayed)!
All hanger wires
must be vertical (not
splayed)!
Steel Duct
Steel Duct
Drop
Thermal
Blanket
Ceiling
Radiation
Damper
9 3/4 in.
(248mm)
Maximum
