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198934 Roof Stairs INSTALLATION INSTRUCTIONS.pdf - Westeel

198934 Roof Stairs INSTALLATION INSTRUCTIONS.pdf - Westeel

6. Attach four more 1”

6. Attach four more 1” diameter support arms to the second vertical support tube in a similar manner to # 2 above. Using these as guides, position and secure the third and last vertical support tube as per # 3 above. Use the last support arm to brace the third vertical support tube to the roof rib as per # 2 above. 7. Prevent the support arm clips from sliding down the vertical support tubes by securing with the self drilling screws provided (900461). SELF DRILLING SCREW (900461) SECURES SUPPORT ARM CLIP Figure 38 8. Secure the plastic caps (234559) to the vertical support arm tubes. Roof Stair Block-Off Package Hardware Usage (Note: Required hardware also supplied with Roof Stair Packages): All Roof Stair Block-Off Package connections are made using 3/8” x 1” bolts and 3/8” nuts except for the following connections. − Vertical Support Tubes are secured to the grain bin wall sheets using 3/8” x 2 ½” bolts and nuts − Secure middle Vertical Support Tube to the bottom Stair Tread using a 3/8” x 4 ½” fully threaded bolt and triple nutting as shown in the instructions. − Prevent the support arms from sliding down by securing the support arm clips with self drilling screws. Roof Stair Block-Off Package (234049) Part Number Description Quantity 234069 Vertical Support Tube 2 234504 Support Arms 8 234517 Support Arm Clips 13 234518 Support Arm Bracket 2 Page 34

CATWALK ACCESS Catwalks can be accessed from a roof stair with the aid of a plate fabricated as shown. The plate can be bolted to the back off any stair tread on the roof stair and then used to support the bottom of a standard ladder section (234500) which could then tie in with an access point on the catwalk. Ladder sections must be supported structurally every 44”. Page 35

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