Grain Systems PNEG-1276 - Manual (Page 38)

8. Installation
38 PNEG-1276 Top Dry Autoflow Construction Manual 24', 30' and 36'
30' Intermediate Purlin
The upper purlins are bolted using 5/16" x 1-1/4" bolts in the ninth hole counting up from the sidewall. The
middle purlins are bolted in the fourth hole counting up from the sidewall. Bolt purlins to rafters with interior
angle facing the center of the bin as shown in
Figure 8D .
Figure 8D
The angle is to be bolted on the underneath side of
the rafters, joining rafter to rafter, with the angles
interior angle facing the center of the bin.