Grain Systems Tanks PNEG-4054 - Manual (Page 110)

Chapter 7: Roof Assembly
A Roof panel (CTR-0418) D Purlin
B Roof panel holes (drilled through purlin) E Roof rafter
C Roof panel holes (drilled through rafter)
Installing the Roof Flashing
The roof flashing will seal the area between the center collar and the roof panels.
What You Should Know
Each roof flashing section overlaps and bolts together with the previously installed roof flashing section.
110 Pneg-4054 54 Ft Diameter 40-Series Bin