Grain Systems Tanks PNEG-4042 - Manual (Page 84)

12. Support Ring Instructions
84 PNEG-4042 40 Series 42' and 48' Diameter Bins
Roof Support Ring Instructions (Continued)
Figure 12B
Support rings as shown on Page 85 , are optional equipment. Support rings are optional for 54' diameter
tanks and 42'-48' tanks with a roof.
To determine the location of the safety rings, start at the narrow or peak of the roof panel and count each
hole separately. Count down the required distance and install the appropriate brackets.
See Table on
Page 85 for proper location.
Expansion bolts should be fully contracted when assembling safety rings. When both rings are completely
assembled, but are not yet expanded, tighten all roof bolts including eave clip bolts. Now extend expansion
bolts by running nut out on threads. This procedure should be continued evenly around the roof until the
ring raises the roof to show a slight crown.
Safety Suggestion: Support ring expansion bolts may become dislodged from the ring during high winds
or when the inside pressure of the bin is too great. If one expansion bolt is dislodged, the entire ring will
become useless. To prevent this, drill holes through the support ring and expansion bolt (after the rings
have been installed and expanded to the correct size) and insert a cotter pin or bolt through each hole.
Ref # Part # Description Ref # Description
A R-997 Safety Ring Bracket C Expansion Bolt
B Support Ring D Omit Roof Step at Ring Locations