Roof Supply Fan
5
®
Roof Supply Fan
1.25
Curb Corner
Anchor Detail
1.25
Roof Curb
Model SD, SDP, GPF or Equivalent
18 ga. Min.
24 in.
(610 mm)
Tall Max.
Welded Steel Construction
Roof Curb
Roof Curb
1/4 in. - 14 Self-Drilling Screw
Min. 1/2 in.
(13 mm)
of Threads Through
Roof Truss
1/8 in.
(3 mm)
Thick
or 12 ga. Min.
3/8 in.
(10 mm)
S.S. Hilti Kwik Bolt 3
Expansion Anchors
Min. 2-1/2 in.
(64 mm)
Engagement
2000 Min. PSI
Concrete
Concrete
Deck Anchoring
Steel
Deck Anchoring
Timber Anchoring
Roof Curb
Wood Timber
Min. 4 in.
(102 mm)
Nominal Thickness
Min. G = 0.42
G = specific gravity
of lumber
3/8 in.
(10 mm)
Lag Bolt (Zinc Plated)
Min. 3 in.
(76 mm)
Thread Engagement
High Wind Ratings
Seismic Ratings
Fan Size
Curb Cap Size
Fastener Size
and Type
Fasteners
Per Side
Total
Fasteners
Fan Size
Fasteners
per side
Total
Fasteners
Concrete
90, 100, 120
26x26 to 34x34
(660x660 to 864x864 mm)
3/8-inch S.S.
Hilti Kwik Bolt 3
Expansion
Anchors
3
6
90, 100, 120
3
6
150
40x40
(1016x1016 mm)
4
8
150
4
8
180, 200
46x46 to 52x52
(1168x1168 to 1321x1321 mm)
5
10
180, 200
5
10
Steel
90, 100, 120
26x26 to 34x34
(660x660 to 864x864 mm)
1/4 in. - 14
Self-Drilling
Screw
3
6
90, 100, 200
3
6
150
40x40
(1016x1016 mm)
4
8
150
4
8
180, 200
46x46 to 52x52
(1168x1168 to 1321x1321 mm)
5
10
180, 200
5
10
Timber
90, 100, 120
26x26 to 34x34
(660x660 to 864x864 mm)
3/8-inch
Lag Bolt
(zinc plated)
3
6
90, 100, 120
3
6
150
40x40
(1016x1016 mm)
4
8
150
4
8
180, 200
46x46 to 52x52
(1168x1168 to 1321x1321 mm)
5
10
180, 200
5
10
All dimensions are in inches
(millimeters)
.
Mounting for Severe Duty Installations
Fan to Curb:
Three (3) fasteners are required
per side on all sides. Must be equally spaced.
Curb to Deck:
Fasteners need to be located on two
opposite ends of the curb.
IMPORTANT
Installation instructions for seismic ratings are only recommendations. Final design must be determined by
Structural Engineer of Record (SEOR) including requirements for curb construction, mounting of unit to curb and
mounting of curb to structure.
