Grain Systems Tanks PNEG-4075G - Manual (Page 102)

Chapter 7: Roof Assembly
Table 7-3 For standard roof
Bin Diameter Peak Capacity Ground Snow Load Approximate A-Frame Weight
75 ft. (22.86 m) 50 K 50 PSF 1106 lb (501 kg)
75 ft. (22.86 m) 50 K 50 PSF 1747 lb (792 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
Center Collar
Placement , page 97 . 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,
page 100 .
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 103 .
Figure 7-25 Exploded view of A-frame to center collar
102 Pneg-4075G 75 Ft Diameter 40-Series Bin