Grain Systems Tanks PNEG-1092 - Manual (Page 25)

PNEG-1092 30° Bin Roof Construction 25
6. Center Collar Details
The standard roof with a dome cap lid will have a center collar assembled from three (3) pieces. The
dome cap will mount onto it as well as the flashing. The dome cap is standard on all 12'-48' bins and
54'-60' FCDL, WSL and NSL series bins. A flat top is standard on all 39'-60' NCL and WCL commercial
series bins.
For the 33'-48' dome cap bins, this will be the upper or “top” center collar. The lower or “Z” center collar
details are given on the later pages.
54'-60' dome cap bins and 33' and larger flattop bins do not have the top center collar.
Figure 6A