3
RETURN
AIR
SMALL
BASE
UNIT
SUPPLY
AIR
LARGE
BASE
UNIT
UNIT PLACEMENT ON
COMMON CURB
C
B
A
F
D
E
LARGE CURB
C
B
A
F
D
E
Dashed lines show cross support
location for large basepan units.
SMALL OR LARGE BASE UNIT
COMMON CURB
ROOF CURB DETAIL
Wood nailer*
Roofcurb*
Insulation
(field supplied)
*Provided with roofcurb
Cant strip
field supplied
Roofing material
field supplied
Flashing field
supplied
HVAC unit
base rails
Roofcurb
Sealing
Gasket
HVAC unit
basepan
Anchor screw
A09090
A09095
A09096
A09094
A09097
UNIT SIZE
CATALOG
NUMBER
A
IN. (mm)
B (small base)
IN. (mm)*
B (large base)
IN. (mm)*
C
IN. (mm)
D
IN. (mm)
E
IN. (mm)
F
IN. (mm)
Small or
Large
CPRFCURB010A00 11 (279)
10 (254)
14 (356) 16 (406) 47.8 (1214)
32.4 (822)
2.7 (69)
CPRFCURB011A00 14 (356)
Large
CPRFCURB012A00 11 (279)
14 (356) 43.9 (1116)
CPRFCURB013A00 14 (356)
NOTES:
1. Roof curb must be set up for unit being installed.
2. Seal strip must be applied, as required, to unit being installed.
3. Roof curb is made of 16-- gauge steel.
4. Attach ductwork to curb (flanges of duct rest on curb).
5. Insulated panels: 1--in. (25 mm) thick fiberglass 1 lb. density.
Fig. 4 -- Roof Curb Dimensions
50XT--A
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