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a
b
b
c
B. Pre-drill angle irons
Before drilling the angle irons, confirm that you have the appropriate mount to accommodate your roof
pitch.
Drill two Ø9/16” (1.4 cm) holes exactly 5-3/8” (13.7 cm) apart in the centers of two angle irons.
Measure the distance between the mounting points of the roof structure that the angle irons will span. Measure
the same distance on the angle irons and drill a Ø9/16” (1.4 cm) hole through each end of the angle irons.
Drill holes in two angle irons if the span is 8 ft (2.4 m) or less. Drill holes in four angle irons if span is greater than
8 ft (2.4 m).
C. Fasten angle irons together (if span is longer than 8 ft [2.4 m])
If the angle iron span is 8 ft (2.4 m) or less, skip this step and proceed to step D.
If the angle iron span is longer than 8 ft (2.4 m), use double angle irons. Locate the center of the angle iron. Drill a
Ø9/16” (1.4 cm) hole in the center of the vertical wall of each angle iron. Drill a total of four angle irons.
Place two drilled angle irons back to back and fasten them together with Ø1/2-13 Grade 8 hardware. Align the
angle irons to each other and tighten the bolts to 40 ft·lb (54.2 N·m) using a torque wrench and 3/4” socket.
Repeat this step for the remaining two angle irons.
Grade 8 Hardware (Installer-Supplied):
a. (2) 1/2-13 Bolt
b. (4) 1/2” Washer
c. (2) 1/2-13 Nylock Nut
Mount with extension tube: 5-3/8’’ (13.7 cm)
Direct mount: 5-1/2’’ (14 cm)
Distance between roof structure
mounting points
A
1/2 A
Ø 9/16’’ (1.4 cm)
Side view
