Grain Systems Tanks PNEG-4090A - Manual (Page 75)

Chapter 7: Roof Assembly
Figure 7-7 A-frame assembly (Note: complete A-frame assembly shown for clarity)
A Upper rafter (CTR-0437) C 1/2 x 1-3/4 in. flange bolt (S-10252)
B Lower rafter (CTR-0436 and CTR-0438) D 1/2 in. flange nut (S-10253)
After You Finish
Repeat this procedure for the remaining rafters.
Pneg-4090A 90 Ft Diameter 40-Series Bin 75