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5
MOUNTING METHOD 2: ANGLE IRONS
5.4 Pre-Drill Angle Irons:
Drill two 9/16” (1.4cm) holes exactly 4” (10.16 cm) apart in the center of the 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 9/16” (1.4cm) diameter holes through each end of the angle irons. Drill
holes in two angle irons if the span is 8’ (2.4m) or less. Drill holes in 4 angle irons if span is greater than 8’ (2.4m)
.
5.5. Fasten Angle Irons Together (if span is longer than 8’)
If the angle iron span is 8’ (2.4m) or less, proceed to step 5.6a on the following page.
If the angle iron span is longer than 8’ (2.4m), it is necessary to use double angle irons.
Locate the center of the angle iron length. Drill 9/16” (1.4cm) diameter hole through the center of the vertical wall of
the angle iron. Drilling through a total of four angle irons.
Place two drilled angle irons back to back. Fasten the angle irons together with customer supplied grade 5
hardware.
Align the angle irons to each other and tighten the bolts to 90 ft-lb (122 N-m) using a 3/4” socket with torque
wrench.
Proceed to step 5.6b.
Grade 5 Hardware (customer supplied)
a. (2) 1/2”-13 GR 5 Bolt
b. (4) 1/2” Flat Washer
c. (2) 1/2” Nylock Nut
