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Old 08-05-2011, 09:56 AM   #1
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2 layers of plywood?

I am in the middle of a shell off floor replacement on my 1970 Ambassador 29'. I have torn the old floor out and noticed that at each lateral frame member (where plywood seams are) there is an additional strip of plywood between the sub floor and frame member. Is this standard? The two edges of sub floor that butt together are nailed to this strip underneath, essentially gusseting them together. It makes sense I guess.
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Old 08-05-2011, 11:23 AM   #2
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That should just be a way of securing the span of plywood. It will take some of the bounce out for those longer spans between frame rails.
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Old 08-05-2011, 11:55 AM   #3
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Originally Posted by P&K View Post
I am in the middle of a shell off floor replacement on my 1970 Ambassador 29'. I have torn the old floor out and noticed that at each lateral frame member (where plywood seams are) there is an additional strip of plywood between the sub floor and frame member. Is this standard? The two edges of sub floor that butt together are nailed to this strip underneath, essentially gusseting them together. It makes sense I guess.
Yes, that's how they built the floors. In the narrow body 70's trailers, the floor is only 7' 8" wide, so a 4" strip is cut off the end of each piece of plywood. These cut offs are used as gussets to reinforce the seams. If you look at the framing cross members, where the seams and gussets are, the cross member is about 3/4" lower than the other ones to allow for the gusset. Glue and screws (or nails) hold it all together, and then it's bolted to the frame.

Chris
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Old 08-06-2011, 11:37 PM   #4
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I just noticed this today But I was wondering was it necessary for the installers to bend the length of the bolt sticking past the nut?

Gonna be a SOB to remove.

Oh well I have cutting torches.

I am replacing just a 4 x 8 section in the rear bath of my 69 land yacht.

http://www.airforums.com/forums/f36/...out-78002.html


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Old 08-07-2011, 12:36 AM   #5
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The bent bolts are an insurance policy so the nut wont walk all the way down the threads and fall off. Like that crusty rusty square nut is gonna walk down a welded together with rust, machine threaded 6 mile long bolt! Hahaha

Another technique borrowed from the aircraft industry...all bolts should point down with nuts installed from the bottom, that way if a nut wiggles loose, the bolt is still there to hold things together.
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Old 08-07-2011, 11:06 AM   #6
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Yes "held in by Gravity" I am familiar with that technique.

Would seem to me the Wire thru the hole would be more to aviation technology .

I prefer "top locks' Myself.


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Old 08-08-2011, 03:31 PM   #7
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Yes "held in by Gravity" I am familiar with that technique.

Would seem to me the Wire thru the hole would be more to aviation technology .

I prefer "top locks' Myself.

SR66
If you take your Airstream to the South Pole, do you change them to bolt in from bottom? Hahaha
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Old 08-10-2011, 02:43 PM   #8
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If you take your Airstream to the South Pole, do you change them to bolt in from bottom? Hahaha
And I can't even imagine what you do in space...

Oh, wait I remember- they use Duct tape. Like when fixing lunar landers.

I guess we'll find out soon, since I'm pretty sure the Airstream is a contender for the space shuttle replacement program.
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Old 08-10-2011, 08:52 PM   #9
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Wow

Ok everyone. I will probably end up moving this thread into one containing my whole project. This is just the start. I have some great pictures up to now that I will post later.

I have the shell off. The floor is totally shot. HORRIBLE. Front C-Channel is ok. Side channels are easy. The rear channel is shot. Does anyone have a source for the 1970 style C-channel (U-channel)? It is not the C-on-U style found in later 70s models, and its not the J-channel found in 60s models (at least I don't think it is). It is the same height on both interior and exterior.

Does anyone know where I might get this rear channel? Ideally I would like to find the channel specific to this model so that I don't have to cut and bend to match the curve. Andy, correct me if I'm wrong, but I don't think Inland has this type.
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Old 08-10-2011, 09:12 PM   #10
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Ok everyone. I will probably end up moving this thread into one containing my whole project. This is just the start. I have some great pictures up to now that I will post later.

I have the shell off. The floor is totally shot. HORRIBLE. Front C-Channel is ok. Side channels are easy. The rear channel is shot. Does anyone have a source for the 1970 style C-channel (U-channel)? It is not the C-on-U style found in later 70s models, and its not the J-channel found in 60s models (at least I don't think it is). It is the same height on both interior and exterior.

Does anyone know where I might get this rear channel? Ideally I would like to find the channel specific to this model so that I don't have to cut and bend to match the curve. Andy, correct me if I'm wrong, but I don't think Inland has this type.
P&K The channel is pretty easy to get either Andy @ Inland RV, Outdoors Mart, Collin Hyde, or Uwe Sawender @ Area 63 can help you with that. As far as the other channel you can make it if you had a metal break. I made my own, check out my thread.
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Old 08-10-2011, 10:31 PM   #11
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Talking Nice!

Sweet! That info should move things along.

This project is getting really fun now. I have been sitting on this trailer for about a year now. My wife and I got fired up about Airstreams and bought this one quickly. Should have researched more...

Luckily I am a fairly handy guy, and my dad is super handy and has a shop where I can get help with the frame repairs, so this is a father son project . We got the shell off today and have some pics I'll be posting.

Any recommendations on the tank situation? Like I said, Ill be posting pics in a couple days. The black tank seems to have been replaced at some point with a new one from Airstream, so it should be fine. The fresh tank appears original, but not particularly stinky or dirty. Should I add a gray tank? It would seem the black tank IS the gray tank on this model.
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Old 08-10-2011, 11:41 PM   #12
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Any recommendations on the tank situation? Like I said, Ill be posting pics in a couple days. The black tank seems to have been replaced at some point with a new one from Airstream, so it should be fine. The fresh tank appears original, but not particularly stinky or dirty. Should I add a gray tank? It would seem the black tank IS the gray tank on this model.
From what I've seen, the canned response around here on that topic is "what sort of use will your trailer actually see? Will you be boondocking, etc?" and then the debate can come up of using a Blue Boy portable tank or two, versus installing some gray tanks.

I personally expect to be boondocking a lot and like the idea of being completely self-contained. For instance, we will only be installing a single kitchen sink and exterior utility shower (and boondocking outdoor shower) in our trailer, but are putting in 42 gallons of freshwater capacity and 26 of graywater capacity. Big change from the factory 12 gallon fresh and 5 gallon black that was there before. I can't imagine how many tanks I would be buying if we had decided to keep/add a toilet.

So there's one person's perspective for you. Seriously though, what are you using it for, aside from a father-son project which is a GREAT reason by itself.
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Old 08-11-2011, 10:45 AM   #13
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Sweet! That info should move things along.

This project is getting really fun now. I have been sitting on this trailer for about a year now. My wife and I got fired up about Airstreams and bought this one quickly. Should have researched more...

Luckily I am a fairly handy guy, and my dad is super handy and has a shop where I can get help with the frame repairs, so this is a father son project . We got the shell off today and have some pics I'll be posting.

Any recommendations on the tank situation? Like I said, Ill be posting pics in a couple days. The black tank seems to have been replaced at some point with a new one from Airstream, so it should be fine. The fresh tank appears original, but not particularly stinky or dirty. Should I add a gray tank? It would seem the black tank IS the gray tank on this model.
Sounds like a great project! I am wrapping up a year of gutting clean up frame repair/ modification and new tank install. As wordinchaose said depends how you will use your trailer. I have a 30' so I decided to ad d a grey tank. I got mine from Ronco you can check it out on my thread. I hope to have pics of the dry fit up this weekend.
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Old 08-11-2011, 05:28 PM   #14
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A 1970 AS did not have any grey tanks, the grey water watered the ground. It's one of those "while we're at it, we might as well add tanks" ideas. We're adding grey tanks to our '72. Chris is building them - you can see it on our thread "Little Girl Refurb". We're almost ready to install them...

Kay
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