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9
Model Number Code
The Model number system is designed to completely identify the fan. The correct code letters must be
specified to designate belt or direct drive. The remainder of the model number is determined by the size and
performance selected from the following pages.
LB - 30 - 7
Motor hp (Belt Drive only)
6 = 1/6 10 = 1 50 = 5
4 = 1/4 15 = 1
1
⁄2 75 = 7
1
⁄2
3 = 1/3 20 = 2 100 = 10
5 = 1/2 30 = 3 150 = 15
7 = 3/4
Motor RPM (Direct Drive only)
A = 1725
B = 1140
C = 860
Model
LD - Fabra Hood Direct Drive
LB - Fabra Hood Belt Drive
LDP - Louvered Penthouse Direct Drive
LBP - Louvered Penthouse Belt Drive
Fan Size
LD/LDP 60 thru 120
LB/LBP 10 thru 54
9
OUTSIDE CURB DIMENSION
ROOF OPENING
2.5 INCH (57 MM)
EMBEDMENT
CURB HEIGHT
12, 18, OR 24 INCHES
(305, 457, or 610 MM)
THROAT DIMENSION AND ROOF OPENING EQUAL OUTSIDE CURB DIMENSION MINUS 3.5 INCHES (89 MM)
MINIMUM CONCRETE
STRENGTH OF 3000 PSI
THROAT DIMENSION
(ROOF OPENING)
4 INCH (102 MM) TYPICAL
1.75 INCH (44 MM) 1.75 INCH (44 MM)
1.75 INCH (44 MM)
1 INCH (25 MM) INSULATION
2.25 INCH (57 MM) TYPICAL
4 INCH (102 MM)
MOUNTING FLANGE
TYPICAL
HILTI KB11, 3/8-16 X 3 ON
12 INCH (305 MM) MAXIMUM CENTERS.
MINIMUM TWO PER SIDE.
OUTSIDE FLANGE DIMENSION
OUTSIDE CURB DIMENSION
ROOF OPENING
CURB HEIGHT
12, 18, OR 24 INCHES
(305, 457, 610 MM)
THROAT DIMENSION
(ROOF OPENING)
6 X 3 INCH (152 x 76 mm)
STEEL MOUNTING ANGLE
(12 GAUGE MINIMUM)
ROOF TRUSS
CORRUGATED
ROOF DECK
HILTI KWIK-FLEX 12-14 SCREW, NO. 3 POINT.
THREE (3) FASTENERS EACH CORNER AND
MAXIMUM OF 4.5 INCHES (114 mm) SPACING;
ADD ADDITIONAL FASTENERS TO SATISFY.
4 INCH (102 MM)
MOUNTING FLANGE
TYPICAL
CORNER TOP VIEW
4 INCH (102 MM) TYPICAL
1.75 INCH (44 MM) 1.75 INCH (44 MM)
1.75 INCH (44 MM)
1 INCH (25 MM) INSULATION
2.25 INCH (57 MM) TYPICAL
THROAT DIMENSION AND ROOF OPENING EQUAL OUTSIDE CURB DIMENSION MINUS 3.5 INCHES (89 MM)
OUTSIDE FLANGE DIMENSION
Concrete
Steel
Severe Duty Curb
Installation Options