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Typical Curb Installation
Concrete Deck Anchoring
H-GPF Curb Height
8 to 18 in. (203 to 457 mm)
(Optional 24 in. (610 mm) SD Curb)
Minimum Concrete
Strength of 2000 PSI
Minimum 13/4 in.
(44 mm) edge distance
Metal Building/Steel Deck Anchoring
H-GPF Curb Height
8 to 18 in. (203 to 457 mm)
(Optional 24 in. (610 mm) SD Curb)
Roof Truss
Wood Deck Anchoring
H-GPF Curb Height
8 to 18 in. (203 to 457 mm)
(Optional 24 in. (610 mm) SD Curb)
Wood Decking
Wood Support Member
Nominal 2 x 4, 6, 8
Fig. 5
Model
H-G 060, 065, 070, 075
H-G 080, 085, 090, 095
H-G 101, 121
H-G 131,141
H-G 150
H-G 160, 170
H-G 180
H-GB 071, 081, 091
H-GB 101, 101HP
H-GB 121
H-GB 131
H-GB 141, 141HP
H-GB 161, 161HP
H-GB 180, 180HP
H-GB 200, 200HP
H-GB 220, 220HP, 240, 240HP
H-GB 260
H-GB 300, 300HP
• All dimensions are in inches (millimeters). *Approximate weight is shown in pounds (kilograms) without the roof curb and is cataloged with the largest Open Drip Proof motor. **May be
greater depending on the motor.
• The roof curb should be 1½ inches (38 millimeters) less than the curb cap to allow for roofing and flashing.
8
Outside of Roof Curb
1 in. (25 mm) less than Fan
Curb Cap
1 in. (25 mm) Insulation
Roof Opening
5 in. (127 mm) Mounting Flange
Outside Flange
Outside of Roof Curb
1 in. (25 mm) less than
Fan Curb Cap
CONCRETE DECK ANCHORING DETAIL
1 in. (25 mm) Insulation
Roof Opening
Minimum 12 ga Steel
5 in. (127 mm) Mounting Flange
Outside Flange
Outside of Roof Curb
1 in. (25 mm) less than Fan
Curb Cap
1 in. (25 mm) Insulation
Roof Opening
5 in. (127 mm) Mounting Flange
Outside Flange
Curb
Roof
Damper
Cap
Opening
17 (432)
8 (203)
(267)
10
⁄
1
2
17 (432)
10 (254)
12
⁄
(318)
1
2
19 (483)
12 (305)
14
⁄
(368)
1
2
22 (559)
16 (406)
18
⁄
(470)
1
2
26 (660)
16 (406)
18
⁄
(470)
1
2
30 (762)
18 (457)
20
⁄
(521)
1
2
30 (762)
18 (457)
20
⁄
(521)
1
2
19 (483)
12 (305)
14½ (368)
19 (483)
12 (305)
14½ (368)
19 (483)
12 (305)
14½ (368)
19 (483)
12 (305)
14½ (368)
22 (559)
16 (406)
18½ (470)
22 (559)
16 (406)
18½ (470)
30 (762)
18 (457)
20½ (521)
30 (762)
18 (457)
20½ (521)
34 (864)
24 (610)
26½ (673)
40 (1016)
30 (762)
32½ (826)
40 (1016)
30 (762)
32½ (826)
Use
⁄
in. (10 mm) expansion anchor
3
8
or equal into concrete.
Fasteners one on each corner as
detailed.
Each side at center of unit. Maximum
fastener spacing of 8 in. (203 mm),
add additional fasteners to satisfy.
2
⁄
in. (64 mm)
1
2
Embedment Recommended
minimum 1
⁄
in. (41 mm)
5
8
Center fasteners
on flange
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 in. (203 mm), add
additional fasteners to satisfy.
Corrugated Roof Deck
Center fasteners
on 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 in. (152 mm), add
additional fasteners to satisfy.
2 in (51 mm)
Minimum
Embedment
Center fasteners
on flange
Number of Screws (per side)
With Metal/Steel and Concrete With Wood
5
5
5
5
5
7
7
5
5
5
5
5
5
7
7
7
7
7
Corner Detail
(All three options)
11/4 in. (32 mm)
11/4 in.
(32 mm)
Outside
**Approx.
Flange
Weight
26 (660)
18 (8 kg)
5
5
26 (660)
26 (12 kg)
5
28 (711)
43 (20 kg)
5
31 (787)
59 (27 kg)
7
35 (889)
59 (27 kg)
7
39 (991)
81 (37 kg)
7
39 (991)
118 (54 kg)
5
28 (711)
58 (26 kg)
5
28 (711)
63 (29 kg)
5
28 (711)
66 (30 kg)
5
28 (711)
67 (30 kg)
5
31 (787)
83 (38 kg)
5
31 (787)
89 (40 kg)
7
39 (991)
125 (57 kg)
7
39 (991)
138 (63 kg)
7
43 (1092)
158 (72 kg)
9
49 (1245)
305 (138 kg)
49 (1245)
320 (145 kg)
9
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