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Old 07-04-2020, 12:06 AM   #1
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Cabinetmkr's Avatar
 
Brand: Thor Motor Coach
State: Kentucky
Posts: 90
THOR #15113
Thor Hurricane Entry Steps, the structure

After reading a post about another Thor stairwell failing I decided to inspect mine .
I found the left side had failed .. creating a gap when weight is applied to step.

This is not noticeable upon entry or exit ... as you are looking up or out during use.

The surprising thing.. the engineered system here , all the weight of a person is placed on a corner screw, screwed into the motorhome floor, through a piece of 1/4” plastic. (See Photo) this sidewall of the entry box is hung from the floor.

There is steel struts and structure on either side which could had been used for support.
I really cannot believe every stairwell has not failed in every unit made.. they did use “big screws” lmao ... too bad the plastic can’t support 200+ lbs

I really hope this design has been corrected.. it’s going to be an easy fix... but no telling what a dealer would charge for this repair.
My fix will be to attach the bottom to the upper strut.. take all the weight off of the plastic box

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Old 07-04-2020, 12:48 AM   #2
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Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,089
THOR #8860
Wow! Nice catch, and your solution sounds pretty solid.
Good luck: we'll want lots of pictures!
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Old 07-04-2020, 01:12 AM   #3
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Brand: Thor Motor Coach
State: Kentucky
Posts: 90
THOR #15113
Thor Hurricane Entry Steps, the structure

Quote:
Originally Posted by Bob Denman View Post
Wow! Nice catch, and your solution sounds pretty solid.
Good luck: we'll want lots of pictures!

The 2” self drilling screws , which has a taper head was NOT countersunk into the plastic . Because it wasn’t , when the screw was installed , the taper acted as a wedge ..

Holes into plastic, creates “ stress risers” small microscopic cracks which can create stress points.. exactly what has happened here.
Every problem I have found on my unit has been elementary assembly shortcuts or a poor choice of materials .

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