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Old 01-03-2006, 12:19 AM   #99
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Quote:
Originally Posted by Globie64
I was concerned with the glav. steel bolts going through the aluminum channel, and in moisture, making a di-electric contact. There had been evidence of this kind of corrosion, so I used screws through the u-channel with washers with a neoprene gasket, gasket against the al. channel. It seemed like a good idea at the time...

Peter
Yes, I saw considerable di-electric results when I took my trailer apart. I plan on using some kind of washer as well on reassembly. I'm even thinking of using shrink tubing on the top of the bolt shafts to prevent any contact as it passes thru the aluminum. It will be time consuming, but I will feel better. I will also use valcum in the holes to try to prevent water from wicking down the polts and soaking into the end grain of the wood. It was also obivious to me that damage had occured form water in this area as well.
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Old 01-11-2006, 10:50 AM   #100
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Di-electric solution for C channel

After much consideration about di-electric corrosion in the C channel, I decided to insulate the screws and bolts with heat shrink tubing and fiber washers. Condensation between the two shell of the trailer will probably create moisture from time to time in the bottom of the C channel. Moisture and two different metals means di-electric corrosion. Some may think that this is over kill. And maybe it is. I also put a layer of caulking between the C channel and the plywood before screwing things down. The caulking also squeezed up between the channel and screws for added protection. Over kill, yes. But maybe my great grandson, if he wants, will be able to cruse around in a 150 year old airstream. I have included several pictures to show my technique. As always, I would like to here your comments.
Don
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Old 01-11-2006, 10:57 AM   #101
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Elevator bolts di-electric corrosion

Here are pictures showing similar technique used on screws applied to elevator bolts. Some elevator bolts are placed with heads of bolt above and in the C channel some are below and against the plywood.
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Old 01-11-2006, 11:04 AM   #102
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My only question/thought is will you be able to tighten the bolt down really good?

Ken
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Old 01-11-2006, 11:32 AM   #103
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Don,

That looks really neat. Great pictures.

I used an alternate method of putting a little zinc chromate under the head of the screws, and then top dressing with cold galvanizing paint.

I also found some self-drilling hex-head zinc (coated) screws with rubber washers that worked well for the small screws. I coated those with cold galv. paint also.
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Old 01-11-2006, 12:05 PM   #104
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My only question/thought is will you be able to tighten the bolt down really good?

Ken
The bolts tightened up well. The caulking I used also worked to adhere the channel. By using fiber washers I was able to get things really tight. My first try was with rubber washers. That did not work.
Don
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Old 01-11-2006, 12:07 PM   #105
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Don,

That looks really neat. Great pictures.

I used an alternate method of putting a little zinc chromate under the head of the screws, and then top dressing with cold galvanizing paint.

I also found some self-drilling hex-head zinc (coated) screws with rubber washers that worked well for the small screws. I coated those with cold galv. paint also.
Your solution sounds good. Do you have any pics of the screws you used?
Don
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Old 01-11-2006, 12:10 PM   #106
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Back to the Future!

It would be so cool if we could all be here 40+ years from now and compare our dismanteled trailers. And compare our solutions. If nothing else it would be worth several beers and a lot of good conversation.
Don
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Old 01-11-2006, 12:27 PM   #107
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Your solution sounds good. Do you have any pics of the screws you used?
Don
Here ya r:
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Old 01-11-2006, 12:28 PM   #108
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It would be so cool if we could all be here 40+ years from now and compare our dismanteled trailers. And compare our solutions. If nothing else it would be worth several beers and a lot of good conversation.
Don
You want to set something up? How about your place, January 11, 2046? I'll bring the Zimas.
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Old 01-11-2006, 05:46 PM   #109
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It's a party

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You want to set something up? How about your place, January 11, 2046? I'll bring the Zimas.
I'll be 105. It could happen! I'll bring the SOFT CHEWIES!
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Old 01-11-2006, 09:35 PM   #110
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I'll come! We can take mine apart first, since I did not provide for corrosion protection at all.
Let's see if my Palm takes this date...
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Old 01-11-2006, 09:41 PM   #111
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I'll come also, at the rate we are going the Liner should be complete and I will be 100 in September.

Bill
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Old 01-12-2006, 11:11 AM   #112
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Can I come too? Actually that's a Thursday - can we move it to Friday the 12th or Saturday the 13th.
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