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Old 03-09-2019, 10:58 PM   #1
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Brand: Thor Motor Coach
Model: Challenger 37LX
State: Maryland
Posts: 109
THOR #3920
Question Thickness of outside wall

I would like to hang up a secondary towel rack in my bathroom because the single bar isn't enough for 3 people and my wife hates the over door hanger I bought. We found a 5 hanger rack that will fit behind out toilet and the wall seems solid all the way down.

My question is this. Has anyone hung towel racks on the outside wall behind the toilet? I have a 2017 Challenger 37LX. I looked in my cabinets that are hung but cannot see any screws holding them (although they have to be there because the cabinets do not levitate). The screws that came with the rack seem like they might be a tad long and the last thing I want to do is go through the outside wall. The only thing I can try is to put the slide out most of the way and try to gauge how thick the wall is.

If anyone has ever hung a towel rack, could you give me an idea of the length of screw used.

Thanks in advance.
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Old 03-11-2019, 09:01 PM   #2
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Model: 2013 31L
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THOR #908
I have no idea about your particular model....
but I'd suppose you likely have a door or window on that same wall. Open it and measure.
Mine are fairly thick...if memory serves something like 2 to 2-1/2 inch ballpark.... I just don't remember exactly.
It's got some aluminum square tube frame with a skin on the inner and outer surfaces and a foam core in most areas.

Actually the best thing you could do.. log onto Thor's site ion teh owner's resource area. Nothing there for my older model the last time I checked. maybe you have stuff available for yours. Otherwise, call Thor's customer service and have VIN number handy.
They can tell you exactly, as well as send some drawings that at least roughly show where the frame members are, and wood panels, etc...
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Old 03-11-2019, 10:21 PM   #3
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The walls are assembled around an aluminum ladder frame of 1 inch square tubing. Balsa and foam filler are used to fill the voids between the plastic skin. Steel backing plates are bonded in where cabinets are hung from the walls. Thor has an excellent video on You-Tube showing a coach build in plant 850. <
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Old 03-11-2019, 10:25 PM   #4
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Sorry to split he post but... You can use a magnet to search for the steel plates. The aluminum tubing is soft and doesn't hold machine screws well, but aluminum tubing can be found using a stud finder.
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Old 03-12-2019, 01:02 AM   #5
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State: Virginia
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Quote:
Originally Posted by RVCampingNut View Post
I would like to hang up a secondary towel rack in my bathroom because the single bar isn't enough for 3 people and my wife hates the over door hanger I bought. We found a 5 hanger rack that will fit behind out toilet and the wall seems solid all the way down.

My question is this. Has anyone hung towel racks on the outside wall behind the toilet? I have a 2017 Challenger 37LX. I looked in my cabinets that are hung but cannot see any screws holding them (although they have to be there because the cabinets do not levitate). The screws that came with the rack seem like they might be a tad long and the last thing I want to do is go through the outside wall. The only thing I can try is to put the slide out most of the way and try to gauge how thick the wall is.

If anyone has ever hung a towel rack, could you give me an idea of the length of screw used.

Thanks in advance.
You can also try completely removing a drawer from one of your base cabinets. If you can see the back of the outside wall, you might also find cutouts for outside speakers, Tv cabinet, etc.
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Old 03-12-2019, 06:34 PM   #6
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A trick I have used, as a last resort... Drill a very tiny diameter pilot hole where you are planning to mount the towel rack. Drill it very shallow, just deep enough to go through the wallboard or paneling. Push a rigid piece of wire through the hole until you get the "thud" where it hits the outside wall. Now you know the longest screw you can safely use. If you decide not to go through with the installation, the hole should be tiny enough so it's not a problem to hide.
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Old 03-12-2019, 06:52 PM   #7
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THOR #8860
Why not look for something that can be attached to the wall with some sort of decently-strong adhesive?
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Old 03-12-2019, 09:56 PM   #8
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THOR #12231
I think they are only 1.5 inch thick on most Thor MH. I think Newmar advertizes 2 inch thick.
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Old 03-17-2019, 11:59 PM   #9
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THOR #3920
I opted to not attempt to hang a towel rod on the outside wall. Instead, under the cabinet that sits over the toilet, there is plenty of space to hang from that. I will most likely fashion something that screws to the cabinet and then bring down some wood, or wood strips to hang the towel holder. With some nice wood and stain, I can get it looking like it belongs there .... and the wife will be happy. If only I could train her to not use 3 towels when showering
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