
Chapter 6: Installing Winding Bin Stairs (Intermediate to Bin Bottom)
Installing the Stair Sections (Intermediate Platform to Bin Bottom)
In a bin with intermediate platform, each sidewall ring will have a 4–step stair section installed to the plat-
form first followed by the 5–step stair sections for each sidewall ring.
1. Align the top end of the 4-step stair section (AC) to the bottom end of the stringer attachment plates
(12) in the platform (G) and secure using the flange bolts (2) and flange nuts (3).
NOTE:
Hand-tighten the flange bolts (2).
2. Align the bottom end of the 4-step stair section (AC) to the handrail post (49) and the inside stringer
support (48) and secure using flange bolts (2) and flange nuts (3).
NOTE:
Hand-tighten the flange bolts (2).
Figure 6-3
Installing the 4–step stair section
2
5/16 x 3/4 in. flange bolt (S-6606)
49
Bin stair handrail post (WBS-0004)
3
5/16 in. flange nut (S-3611)
G
Platform assembly
12
Stringer attachment plate (WBS-0026)
AC
4–step stair section
48
Inside stinger support (WBS-0088)
3. Align the top end of the next 5-step stair section (AD) to the bottom of the 4–step stair section (AC)
and secure using flange bolts (2) and flange nuts (3).
NOTE:
Hand-tighten the flange bolts (2).
4. Align the bottom end of the 5-step stair section (AD) to the handrail post (49) and the inside stringer
support (48) and secure using flange bolts (2) and flange nuts (3).
NOTE:
Hand-tighten the flange bolts (2).
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PNEG-2077
TopDry – Platforms and Bin Stairs