Grain Systems Tanks PNEG-4135 - Manual (Page 90)

Chapter 7: Roof Assembly
Assembling a Laminated Purlin
Laminated purlins nest together to give additional strength and should be assembled before constructing
the A-frames.
What You Should Know
Refer to
Attachment Locations of Purlins to Rafters , page 88 for laminated purlin installation locations in
the A-frame.
NOTE: The purlin insert will have a red paint stripe marked on it for identification purposes.
1. Place the purlin (A) against the mating surface of the purlin insert (B), and install flange bolts (C) and
flange nuts (D).
NOTE: The purlin insert is positioned underneath the flange of the purlin.
2. Tighten all the hardware to the recommended torque specification. See Bolt Torque Specifications,
page 26 .
NOTE: Part numbers may vary according to purlin size. See Attachment Locations of Purlins to Rafters ,
page 88 for laminated purlins.
Figure 7-12 Laminated purlin
A Purlin C 1/2 x 1-3/4 in. flange bolt (S-10252)
B Purlin insert D 1/2 in. flange nut (S-10253)
After You Finish
Repeat this process for the remaining laminated purlins.
90 Pneg-4135 135 Ft Diameter 40-Series Bin