Assembling the rafters – Grain Systems Tanks PNEG-4135 User Manual
Page 80
Assembling the Rafters
For the 135 ft diameter bins, each rafter will consist of a two piece design and will need to be spliced
together with rafter clips for assembling the A-frames.
1. Locate an upper rafter (A) and a lower rafter (B), and find the series of twenty holes on each end of
the upper rafter (A) and the lower rafter (B).
NOTE: Assemble rafters with the flanges facing in the same direction.
2. Place the lower rafter (B) in line with the upper rafter (A) and attach the rafter clips (C and F) to either
side of the mating surfaces of the upper rafter (A) and the lower rafter (B) , and align the series of
twenty holes together.
NOTE: Ensure that the flange of rafter clip (C) is facing up and seated below the flange of the rafters
on one side and the flange of rafter clip (F) is facing down and seated above the flange of the
rafters.
3. Install twenty flange bolts (D) and twenty flange nuts (E) securing the rafters with the rafter clips.
4. Install six flange bolts (G) and six flange nuts (H) to secure the bottom flange of the rafters with the
rafter clip (F), and tighten hardware to the recommended torque specifications. See
NOTE: The flange bolts and flange nuts securing the top flange of the rafter and the rafter clip (C) will
be installed only after the roof panels are installed on top of the rafters.
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Pneg-4135 135 Ft Diameter 40-Series Bin