Grain Systems Bin Accessories PNEG-1177 - Manual (Page 10)

2.66” Corrugation Winding Stair PNEG-1177 Page 10 of 16
2.66" Winding Stair Installation
Reference the diagram to determine which hole/slot combination you should use to position the step. The
location of the bolt within the slot will vary according to the diameter of the bin. Use the 5/16" x ¾” truss head
bolts and flange nuts to attach the steps with one bolt through the top tab into the step above. As the steps
are installed, it may be necessary to remove the front inside bolt of the step to stop the interference with the
horizontal bracket. Leave the bolts loose until all steps in the ring are in place.
19) Install brace straps between the steps with 5/16" x ¾” truss head bolts and flange nuts. The braces use one
common hole in each step to attach. Use the lower mounting holes in the step where the brace must pass
under the horizontal wall bracket. Visually determine which holes work best for the tank curvature that you
have. The small slot on the brace will be used on the inside on small diameter bins.
Step Mounting Holes
(Bin side)
Step Mounting Holes
(handrail side)
See Appendix A, B & C
for 60' to 105’ Diameter
Bins
Base Strap Mounting Holes