Attaching the a-frames to the center collar, Chapter 7: roof assembly – Grain Systems Tanks PNEG-4105A User Manual
Page 114
Table 7-3 For alpha roof
Bin Diameter
Peak Capacity
Approximate A-Frame Weight
105 ft. (32.00 m)
30 K
1431 lb (649 kg)
105 ft. (32.00 m)
30 K
2060 lb (934 kg)
(three rafter assembly)
The part variance multiplier is 4%.
Attaching the A-Frames to the Center Collar
The A-frame rafters must be installed to support the center collar and main roof structure.
Before You Begin
The center collar should be assembled and secured to the support pole, and the A-frame rafters should be
assembled. Determine the correct location of each A-frame. For more information, see
. Read and understand the safe and proper lifting procedures needed to install the
A-frames. For more information, see
Guidelines for Assembling and Lifting the A-Frame Rafter Sections,
1. Carefully lift the A-frame assembly (A) into position, and align with the proper holes on the center
collar (B).
2. Install flange bolts (C) and flange nuts (D) as shown.
3. Before continuing with the remaining A-frame rafters, secure the A-frame rafter to the eave clip. See
Attaching the A-Frame to the Eave Bracket , page 115
.
Figure 7-30 Exploded view of A-frame to center collar
A
A-frame rafter assembly
C
1/2 x 1-3/4 in. flange bolt (S-10252)
B
Center collar (CTR-0089 and CTR-0091)
D
1/2 in. flange nut (S-10253)
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Pneg-4105A 105 Ft Diameter 40-Series Bin