Support and bridging ring instructions – Grain Systems Tanks PNEG-1092 User Manual
Page 38
8. Support Ring Instructions
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PNEG-1092 30° Bin Roof Construction
Figure 8B
Support and Bridging Ring Instructions
, are optional equipment. Support rings are optional for
54'-105' diameter tanks and 42'-48' tanks with a commercial roof.
To determine the location of the safety and bridging 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.
for proper location.
Expansion bolts should be fully contracted when assembling safety and bridging 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.