4. Roof Assembly
26
PNEG-2145
21' Diameter Gamma Roof Assembly Instructions
Assembling the Purlin
Purlins are horizontal members between the rafters that give support to the roof structure. The length of
the purlin determines its location on the rafter assembly.
Before You Begin
All roof rafter assemblies must be installed and secured to both the peak ring weldment and roof
rafter brackets.
IMPORTANT:
Do not drill any additional holes on the purlin. Install the flange bolts and flange nuts as
dictated by the purlins.
NOTE:
The fifth 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 an upper left purlin clip (E) and upper right purlin clip (D) to the roof rafter (B) and install
two (2) flange bolts (F) and two (2) flange nuts (G).
2. Attach an upper left purlin clip (E) and an upper right purlin clip (D) to the roof rafter (A) and install
two (2) flange bolts (F) and two (2) flange nuts (G).
3. Position the purlin (C) to the upper right purlin clip (D) and the upper left purlin clip (E) located
between the roof rafters (A and B).
NOTE:
Ensure that the orientation of the purlin is correct of the three (3) holes on the purlin as
shown in
.
4. Attach a lower left purlin clip (J) and a lower right purlin clip (K) to the purlin and install eight (8) flange
bolts (H) and eight (8) flange nuts (I) securing the purlin to the purlin clips.
5. After all purlins (C) are installed, tighten all hardware to the recommended torque specifications.
See bolt torque specifications on
Figure 4M Purlin Hole Orientation
Ref #
Part #
Description
C
CRP-7347
Purlin
J
CRP-7295
Lower Left Purlin Clip
K
CRP-7309
Lower Right Purlin Clip
