Installing the 4–hole intermediate purlins, Chapter 7: roof assembly – Grain Systems Tanks PNEG-4075 User Manual
Page 107
Installing the 4–Hole Intermediate Purlins
Intermediate purlins must be installed to connect each A-frame roof rafter assembly together. 4-hole inter-
mediate purlins have only four holes on each side to secure them with the purlin clips.
Before You Begin
All A-frame roof rafter assemblies must be installed and secured to both the center collar and the eave
brackets.
1. Install the intermediate purlin (A) to the purlin clips (B and D) located outside of each A-frame roof
rafter assembly (E).
IMPORTANT: Do not drill additional holes in purlins. Install the flange bolts and nuts as dictated by
the number of holes in the purlin.
2. Install four flange bolts (C) and four flange nuts (F) to each end of the purlin (A) securing the inter-
mediate purlin to the purlin clips.
3. Tighten the hardware to the recommended torque specifications. See
Figure 7-29 Exploded view of the 4-hole intermediate purlin
A
Purlin (CTR-0210 and CTR-0211)
D
Purlin clip
B
Purlin clip
E
A-frame roof assembly
C
1/2 x 1-3/4 in. flange bolt (S-10252)
F
1/2 in. flange nut (S-10253)
Pneg-4075 75 Ft Diameter 40-Series Bin
107