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HT
Run=12
Rise
RIDGED
Run=12
Rise
PITCHED
HT
HT
Run=12
Rise
RIDGED
Run=12
Rise
PITCHED
HT
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 of a roof with a Rise of
3 inches and a Run of 12 inches equals a ratio
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.
A
B
2 1/2 in.
1.500
Fan
Curb
Fan
Curb
Curb Adapt Down
A
2 1/2 in.
Curb Cap W & L
AD
Curb Cap W & L - 1/2 in.
Adapted Curb Cap W & L
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
1
⁄2 inches larger than the curb AD
dimensions.
Minimum adapted amount = 1
1
⁄2
inches
Maximum adapted amount = 10 inches
ADAPTER
(Fan curb cap is smaller than existing curb)
A
B
2 1/2 in.
1.500
Fan
Curb
Fan
Curb
Curb Adapt Down
A
2 1/2 in.
Curb Cap W & L
AD
Curb Cap W & L - 1/2 in.
Adapted Curb Cap W & L
REDUCER
(Fan curb cap is larger
than existing curb)
GPF
GPI
FLANGED
CURB
WOOD NAILER
CURB
1¾
in.
1¾
in.
Dimensional Data
Model Dimensions
GPI, GPS, GPR, ATR, ATS, ATI
nominal wood nailer curbs
AD (actual) = 1½ inches less than unit curb cap
GPF, GPFV, GPEX, VCE, ISB, ATE
nominal flanged curbs
AD (actual) = 1 inch less than unit curb cap
GPS, GPR, ATS, ATR B = AD Dimension + 8¼ inches
GPI, ATI B = AD Dimension + 4 inches
GPF, GPFV B = AD Dimension + 10 inches
GPE, GPEX, VCE, ISB, ATE B = Same as unit curb cap dimensions
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.
B
B
AD
B
AD
B
AD
AD
BASIC CURB DIMENSIONAL INFORMATION
Models: Models: Models: Models:
GPS, GPR, ATS GPI, GPF, GPFV, ATI GPE, GPEX, VCE, ISB, ATE ATR
B
B
AD
B
AD
B
AD
AD
B
B
AD
B
AD
B
AD
AD
B
B
AD
B
AD
B
AD
AD