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Adjustable Roof Curb Dimensions
ADJUSTABLE PITCH ROOF CURB
A
B
C
3/4 (76)
6
(152)
1
(25)
11-1/2
(292)
42-7/8
(1089)
SUPPLY
AIR
OPENING
RETURN
AIR
OPENING
2-1/8
(54)
UNIT BASE RAIL
BUILT-IN DRIP EDGE
BUILT-IN RAIN
DIVERTER
(Not Shown)
FRONT FLANGE
8 (203)
SIDES AND
BACK FLANGE
6 (152)
UNIT BASE RAIL
CLIPS (4)
NOTE:
Minimum
Height
4 (102)
UNIT BASE RAIL
CLIPS (4)
Usage
A
B
C
in.
mm
in.
mm
in.
mm
24, 36
42-7/8
1089
13-7/8
352
16-7/8
429
48, 60
51-3/8
1305
19-1/2
495
19-1/2
495
NOTE - Roof deck may be omitted within confines of curb.
NOTE - If bottom entry is used, condensate from the heat exchanger may leak during warm ambient temperatures in humid
climates. Ensure that bottom entry is watertight, if used.
