
Chapter 4: Installing Winding Bin Stairs (Intermediate to Eave)
Installing the Winding Bin Stair Handrails
The following procedure is for the installation of outer handrails for the winding bin stair assembly
1. Install the handrail brackets (17) to the end of bin stair handrail posts (49) using flange bolts (2) and
flange nuts (3).
NOTE:
Install the flange bolts (2) from the inside of the stairs assembly and flange nuts (3) on the
outside.
2. Starting at the top of the winding bin stair assembly and working towards the bottom, orient the
upper handrail (41) with the swaged end up and secure it to the handrail brackets (17) using two
self-drilling screws (4) per bracket.
NOTE:
• The swage at the top end will need to be cut off before it is attached to the handrail post
in the platform.
• Install the self-drilling screws (4) from the outside of the handrail brackets (17).
3. Starting at the top of the winding bin stair assembly and working towards the bottom, orient and
align the lower handrail (42) to the holes located in the middle of the handrail posts (49) and secure
using self drilling screws (4).
NOTE:
• The swage at the top end will need to be cut off before it is attached to the handrail post
in the platform.
• Install the self-drilling screws (4) from the outside of the roof handrail posts (49).
PNEG-2077
TopDry – Platforms and Bin Stairs
43