
Chapter 3: Assembling Winding Bin Stair Sections
Assembling the 4–Step Winding Bin Stair Section
Place an inside stringer (65) and a outside stringer (66) at a distance and assemble the four stair
steps (34) in between using flange bolts (2) and flange nuts (3).
NOTE:
• Orient the stringers to ensure the three slot pattern (vertical) is at the bottom of the
stairs assembly.
• Install the flange bolts (2) from the outside of the stringer sections and flange nuts (3)
on the inside.
• Leave the flange bolts (2) loose in the slots to allow the stairs to wrap correctly around
the bin.
Figure 3-1
Assembling the 4–step stair section
2
5/16 x 3/4 in. flange bolt (S-6606)
65
4-step inside stringer
3
5/16 in. flange nut (S-3611)
66
4-step outside stringer
34
Step (WBS-0007)
AH
Stringer identification mark
Bin Diameter (ft)
Inside Stringer
Outside Stringer
Identification (AH)
24 and 30
WBS-0099
WBS-0100
Triangle cut out at bottom
36
WBS-0101
WBS-0102
Square cut out at bottom
34
PNEG-2077
TopDry – Platforms and Bin Stairs