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Dimensional Data
BASIC ADAPTER AND REDUCER
DIMENSIONAl INFORMATION
Curbs without wood nailers = Adapted
curb cap width and length will be
1/2-inch larger than the curb AD
dimension.
Curbs with wood nailers = Adapted
curb cap width and length will be
1
⁄
inches larger than the curb AD
1
2
dimensions.
Minimum adapted amount = 1
Maximum adapted amount = 10 inches
Models:
GPS, GPR, ATS
AD
AD
AD
AD
B
B
B
B
RIDGED
Model
GPI, GPS, GPR, ATR, ATS, ATI
nominal wood nailer curbs
GPF, GPFV, GPEX, VCE, ISB, ATE
nominal flanged curbs
GPS, GPR, ATS, ATR
GPI, ATI
HT
GPF, GPFV
GPE, GPEX, VCE, ISB, ATE
Note: AD is the actual width and length of the roof curb. Roof curbs are typically ordered
using the nominal dimension which is equivalent to the unit curb cap dimension.
Run=12
PITCHED
HT
Run=12
1.500
B
A
(Fan curb cap is smaller than existing curb)
Fan
Curb Cap W & L
2 1/2 in.
Curb Cap W & L - 1/2 in.
⁄
inches
2 1/2 in.
1
2
Adapted Curb Cap W & L
AD
Curb
BASIC CURB DIMENSIONAl INFORMATION
Models:
GPI, GPF, GPFV, ATI
AD
AD
AD
AD
B
B
B
B
Dimensions
AD (actual) = 1½ inches less than unit curb cap
AD (actual) = 1 inch less than unit curb cap
B = AD Dimension + 8¼ inches
B = AD Dimension + 4 inches
B = AD Dimension + 10 inches
B = Same as unit curb cap dimensions
RIDGED
HT
Run=12
PITCHED
ADAPTER
Fan
Curb Cap W & L
Curb Cap W & L - 1/2 in.
2 1/2 in.
Adapted Curb Cap W & L
2 1/2 in.
AD
Curb
Models:
GPE, GPEX, VCE, ISB, ATE
AD
AD
AD
AD
B
B
B
B
WOOD NAILER
CURB
1¾
in.
GPI
TO ORDER PITCHED AND RIDGED CURBS
The following information is required:
1. Specify pitched or ridged.
2. Include roof rise and run (see diagrams). This
will be represented as a ratio (rise:run) with run
always expressed as 12 units. Units of measure
must be the same (inches, centimeters, etc.).
EXAMPlE:
The
Pitch
3 inches
and a
Run of 12 inches
of 3:12.
3. When specifying a rectangular curb, note
whether the slope runs in the direction of the
short side or the long side of the curb.
Fan
Curb Adapt Down
A
Curb
REDUCER
(Fan curb cap is larger
than existing curb)
Models:
ATR
AD
AD
AD
AD
B
B
B
B
FLANGED
CURB
1¾
in.
GPF
of a roof with a
Rise of
equals a ratio
7
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