Grain Systems Tanks PNEG-4021 - Manual (Page 82)

11. Roof Assembly
82 PNEG-4021 40 Series 18', 21' and 24' Diameter Bins
For best results in erecting the roof, install two (2) roof panels in four (4) places as shown in Figure 11C .
When these eight (8) panels are in place, the peak assembly should be centered. Next add two (2) or
three (3) panels at a time to each section making certain to lap them the same way, until all panels are in
place. Be sure the panels are bolted loosely. DO NOT TIGHTEN BOLTS UNTIL THE ROOF IS
COMPLETELY ASSEMBLED. When installing the roof panels, take into consideration placing the
manway for ease of access to and from the sidewall and roof ladders. On Stiffened tanks, particularly
location of the manway panel and roof ladder in relation to the stiffeners is crucial for proper
installation of the ladder system. PNEG-1420 and PNEG-1738 for flat bottomed stiffened tanks.
These manuals are packaged with the ladder and safety cage packages.
Fasten roof sheets to eave clips and sidewall sheets as you assemble.
Figure 11B Roof Overlay
Figure 11C
NOTE: Use the same overlay procedure on all roof sheets.
Ref # Description
A Center Collar
B Roof Panels