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Roof Opening
Minimum 12 Ga. Steel
Roof Truss
Outside Flange
Center fasteners
on fl ange
Use #12-14 self-drilling
screws or equal.
Fasteners one on each corner
as detailed.
Each side at center of unit.
Maximum fastener spacing
of 8 inches (203 mm), add
additional fasteners to satisfy.
Corrugated
Roof Deck
5 inch (127 mm) Mounting Flange
1 inch (25 mm) Insulation
H-GPF Curb Height
8 to 18 inches
(203 to 457 mm)
(Optional 24 inch
(610 mm) SD Curb)
Typical Installation
Metal Building/Steel Deck Anchoring
Typical Installation
Wood Deck Anchoring
Corner Detail
1¼ inch (32 mm)
1¼ inch
(32 mm)
Outside of Roof Curb
(1 inch (25 mm) less than
Fan Curb Cap)
Roof Opening
Center fasteners
on fl ange
Outside Flange
Use #12 Wood Screws or equal into
minimum No. 1/No. 2 Southern Pine
wood support.
Fasteners one on each corner
as detailed.
Each side at center of unit. Maximum
fastener spacing of 6 inches (152 mm),
add additional fasteners to satisfy.
Wood Support Member
Nominal 2 x 4, 6, 8
Wood Decking
2 inch (51 mm)
Minimum Embedment
5 inch (127 mm) Mounting Flange
1 inch (25 mm) Insulation
H-GPF Curb Height
8 to 18 inches
(203 to 457 mm)
(Optional 24 inch
(610 mm) SD Curb)
Corner Detail
1¼ inch (32 mm)
1¼ inch
(32 mm)
All dimensions in inches (millimeters).
H-G
Size
H-GB
Size
H-CUE
Size
H-CUBE
Size
Fan Curb Cap Roof Opening
Fasteners
Per Side
Outside Flange
060 - 075 - 060 - 075 - 17 x 17 (432 x 432) 10½ x 10½ (267 x 267) 5 26 x 26 (660 x 660)
080 - 095 - - - 17 x 17 (432 x 432) 12½ x 12½ (318 x 318) 5 26 x 26 (660 x 660)
- - 080 - 095 - 19 x 19 (483 x 483) 12½ x 12½ (318 x 318) 5 28 x 28 (711 x 711)
101 - 121 071 - 131 098 - 131 098 - 131 19 x 19 (483 x 483) 14½ x 14½ (368 x 368) 5 28 x 28 (711 x 711)
131 - 141 141 - 161 141 - 161 141 - 161 22 x 22 (559 x 559) 18½ x 18½ (470 x 470) 5 31 x 31 (787 x 787)
150 - - - 26 x 26 (660 x 660) 18½ x 18½ (470 x 470) 5 35 x 35 (889 x 889)
160 - 180 180 - 200 180 - 200 180 - 200 30 x 30 (762 x 762) 20½ x 20½ (521 x 521) 7 39 x 39 (991 x 991)
- 220 - 240 - 220 - 240 34 x 34 (864 x 864) 26½ x 26½ (673 x 673) 7 43 x 43 (1092 x 1092)
- 260 - 300 - 300 40 x 40 (1016 x 1016) 32½ x 32½ (826 x 826) 7 49 x 49 (1245 x 1245)
All dimensions in inches (millimeters).
H-G
Size
H-GB
Size
H-CUE
Size
H-CUBE
Size
Fan Curb Cap Roof Opening
Fasteners
Per Side
Outside Flange
060 - 075 - 060 - 075 - 17 x 17 (432 x 432) 10½ x 10½ (267 x 267) 5 26 x 26 (660 x 660)
080 - 095 - - - 17 x 17 (432 x 432) 12½ x 12½ (318 x 318) 5 26 x 26 (660 x 660)
- - 080 - 095 - 19 x 19 (483 x 483) 12½ x 12½ (318 x 318) 5 28 x 28 (711 x 711)
101 - 121 071 - 131 098 - 131 098 - 131 19 x 19 (483 x 483) 14½ x 14½ (368 x 368) 5 28 x 28 (711 x 711)
131 - 141 141 - 161 141 - 161 141 - 161 22 x 22 (559 x 559) 18½ x 18½ (470 x 470) 5 31 x 31 (787 x 787)
150 - - - 26 x 26 (660 x 660) 18½ x 18½ (470 x 470) 7 35 x 35 (889 x 889)
160 - 180 180 - 200 180 - 200 180 - 200 30 x 30 (762 x 762) 20½ x 20½ (521 x 521) 7 39 x 39 (991 x 991)
- 220 - 240 - 220 - 240 34 x 34 (864 x 864) 26½ x 26½ (673 x 673) 7 43 x 43 (1092 x 1092)
- 260 - 300 - 300 40 x 40 (1016 x 1016) 32½ x 32½ (826 x 826) 9 49 x 49 (1245 x 1245)
Outside of Roof Curb
(1 inch (25 mm) less than
Fan Curb Cap)
5