Grain Systems Tanks PNEG-4054A - Manual (Page 90)

Chapter 7: Roof Assembly
Assembling Purlin Number 4
Purlin number 4 is located forth purlin from the eave.
Before You Begin
Place two roof rafters on the ground with roof panel holes facing up.
What You Should Know
The A-frame roof rafter section consists of two roof rafters identified as the left-hand roof rafter (A) and the
right-hand roof rafter (C).
There are also two different purlin clips, a left purlin clip (E) and a right purlin clip (D). The left purlin clip
has seven holes, compared to the right, which has six holes along the purlin and purlin clip mating surface.
NOTE: The seventh hole located in the center of the left purlin clip (E) is for identification purposes only.
No hardware is used in this location.
1. Attach a left purlin clip (E) and a right purlin clip (D) to the right-hand roof rafter (C), and install two
flange bolts (F) and two flange nuts (I).
2. Attach a left purlin clip (E) and a right purlin clip (D) to the left-hand roof rafter (A), and install two
flange bolts (F) and two flange nuts (I).
3. Install the purlin (H) to the right purlin clip (D) and the left purlin clip (E) located between the left-hand
roof rafter (A) and the right-hand roof rafter (C).
NOTE: Ensure that the orientation of the purlin is correct, the roof panel holes are facing up, and the
notch in the purlin is facing the right-hand roof rafter (C).
4. Install eight flange bolts (B) and eight flange nuts (G), securing the purlin to the purlin clips.
5. After all purlins are installed in the A-frame, tighten hardware to the recommended torque specifica-
tions. See Bolt Torque Specifications, page 28 .
90 Pneg-4054A 54 Ft Diameter 40-Series Bin