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Old 09-05-2015, 02:33 PM   #21
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Originally Posted by nat_ster View Post
Just get hat channel made..........

Nat
Or buy/hire a welder.
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Old 09-05-2015, 02:35 PM   #22
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Originally Posted by EastCoastCB View Post
Or buy/hire a welder.
Even doing that, hat channel is the way to go.

I don't recommend the op weld anything.

Nat
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Old 09-05-2015, 02:38 PM   #23
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How much did a your Hat Channels cost you? I already bought all the tubes is all haha
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Old 09-05-2015, 02:41 PM   #24
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How much did a your Hat Channels cost you? I already bought all the tubes is all haha
Just have someone weld em up and be done...
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Old 09-05-2015, 03:13 PM   #25
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Originally Posted by EastCoastCB View Post
Just have someone weld em up and be done...
Or just smear a bunch of JB weld in there before stuffing the tubes into the hat channels. Lol.

It will hold about the same.

Nat
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Old 09-06-2015, 08:36 AM   #26
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Or just smear a bunch of JB weld in there before stuffing the tubes into the hat channels. Lol.

It will hold about the same.

Nat
You're being VERY dishonest now.
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Old 09-06-2015, 09:23 AM   #27
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Well what if I weld it? Is that gap ok?
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Old 09-06-2015, 10:59 AM   #28
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The whole idea behind a proper, tight, well secured fit is to transfer any loading.

Air does not transfer loads well.
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Old 09-06-2015, 11:23 AM   #29
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Tubing is just the wrong material, no matter how you secure it.

You should have got the hat channel made.

Mine cost around $400.

Nat
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Old 09-06-2015, 11:49 PM   #30
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In my own relatively uneducated opinion, I would go a little easier on the square tube than nat_ster does. His use of custom hat channel was the first time I'd heard the idea. Square tube was the only method I'd heard of up to that point, and plenty of successful raises have been done with it.

However... I don't recall reading of a raise that involved bolted square tube. I only recall it being done with welds. For me that's the biggest concern here and it's because of the possibility of the tube crushing and losing its strength.

On my Blue Bird I've found a few places where connections are done with bolts. Most of them aren't truly structural though. There are a few that apparently are; the rear-most rib of the bus which is part of the body cantilever over the rear engine (the body is not supported by the frame out back) has this interesting clip piece inside the rib/hat channel.


With all that said: I agree with nat_ster that hat channel is superior to square tube. It's been several months now, but from memory I think the sheet metal shop charged me US$27 each for 10 foot lengths of 14 gauge galvanized steel hat channel made to my specification. I took them a sample of the Blue Bird channel and asked them to make a new channel to fit on top. We got the first pieces riveted into place Saturday, and it's beautiful. That shop did a great job on the channel. I show it here fastened with four 1/4" solid rivets; I haven't decided yet whether to do any more than that.

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