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Typical Installation and
Anchoring
Concrete Deck Anchoring
USGF
Size
Fan Curb Cap Roof Opening Fasteners Per Side Outside Flange
141 - 161 22 x 22 (559 x 559) 18½ x 18½ (470 x 470) 5 31 x 31 (787 x 787)
180 - 200 30 x 30 (762 x 762) 20½ x 20½ (521 x 521) 7 39 x 39 (991 x 991)
All dimensions in inches (millimeters).
Corner Detail
1¼ in. (32 mm)
1¼ in.
(32 mm)
Minimum Concrete
Strength of 2000 PSI
1 in. (25 mm) Insulation
Roof Opening
5 in. (127 mm) Mounting Flange
Outside Flange
Center fasteners
on flange
Use 3/8 in. (10 mm) expansion anchor
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.
Minimum 1-3/4 in. (44 mm)
edge distance
2-1/2 in. (64 mm)
Embedment Recommended
minimum 1-5/8 in. (41 mm)
CONCRETE DECK ANCHORING DETAIL
H-GPF Curb Height
8 to 18 in. (203 to 457 mm)
(Optional 24 in. (610 mm) SD Curb)
Outside of Roof Curb
1 in. (25 mm) less than Fan Curb Cap
Typical Mounting - Fan to Curb
USGF
Size
Fasteners
Per Side
Total
Fasteners
140 - 160 5 20
180 - 200 5 20
Fasteners on each side of the
fan are to be installed with one
fastener 4 in. (102 mm) from each
edge and one fastener centered.
The remaining fasteners are to be
equally spaced.
1/4 in. (6 mm) fastener minimum
5/16 in. (8 mm) recommended
See table for fastener quantities
FAN TO CURB MOUNTING DETAIL
H-GPF or SD curb
Fastener 4 in. (102 mm)
from curb edge