Grain Systems Tanks PNEG-4021 - Manual (Page 89)

12. Support Ring Instructions
PNEG-4021 40 Series 18', 21' and 24' Diameter Bins 89
Roof Support Ring Instructions (Continued)
NOTE: Welding of expansion nuts to the pipe and expansion bolt may be done as an option to drilling
and pinning.
Figure 12C
30° Roof Panel Information
Ref # Part # Description
A R-997 Safety Ring Bracket
B Safety Ring (Optional)
C Expansion Bolt
Part #
Roof Size and Number of
Roof Rib Holes
Rib Length # of Panels
CRP-4627 18' (5.49 m) - 30° 6 Holes 112-3/8'' 18
CRP-4628 21' (6.40 m) - 30° 7 Holes 132-7/8'' 21
CRP-4629 24' (7.32 m) - 30° 8 Holes 153-1/2'' 24
NOTE: Last support ring pipe
will need to be cut to length.