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djkeev
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kamzcab86
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 Posted: Fri Mar 11, 2016 6:07 pm Post subject: Re: ARB Awning, Making your own NO WELD gutter mount! |
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| djkeev wrote: |
How to clamp the upper rain gutter to the mount?
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How can I do this without welding? |
Dometic's version of a gutter bracket:
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djkeev
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djkeev
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vanis13
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| Posted: Fri Mar 11, 2016 7:42 pm Post subject: Re: ARB Awning, Making your own NO WELD gutter mount! |
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you may want to cosnider unistrut beam clamp available at home depot and lowes
Since I have a pre-86 gutter with the top lip I used it the other way around. Would put that bend in and with luck it is the same angle as teh bottom to edge gutter on profile
zoom into this pic - https://www.thesamba.com/vw/gallery/pix/1473864.jpg
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djkeev
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| Posted: Sat Mar 12, 2016 5:17 am Post subject: Re: ARB Awning, Making your own NO WELD gutter mount! |
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So..... I've been puzzling over this riddle all night........
(Look at the time stamps on the screen shots!! )
Based upon the photo below.......
(1) Is the "S" clamp strong enough?
Look at the photo below..... that's some beefy steel that takes TONS of pressing force that I do not have available to me.
(2) It sits in a plane NOT parallel to the vertical mount support....... When I tighten up a bolt that will be passing through both units, one end, or both ends, of the bolt / nut will be sitting askew and not firmly planted at a right angle. This will pull things out of alignment and stress the bolt resulting in possible failure....
(3) One bolt to draw it in or two?
I am leaning towards two..... Just because I tend to think like that!
Now, the machine hardware industry is well aware of these angled connections and the problems they can cause.
You can buy tapered washers, but they are a one angle and done deal!
My clamping angle will change as you draw in the bottom of the "S" plate by tightening the bolt/s.
I thought about making a slot so the bolt can pivot up and down as needed without bending it.
They also make spherical concave washers that mate with spherical convex washers or spherical convex nuts.......
This appeals and can be had off the shelf from Fastenal for less than $2 each.....
BIG thoughts today!!!! 
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Last edited by djkeev on Sat Mar 12, 2016 5:24 am; edited 1 time in total |
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djkeev
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Sodo
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| Posted: Sat Mar 12, 2016 8:39 am Post subject: Re: ARB Awning, Making your own NO WELD gutter mount! |
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You are so right about using two bolts there. I shoulda, especially because it's the fwd mount, and there are only two mounts. We are on the same page there. I will increase my bolt size to 8mm (=5/16") too. Maybe drill 2 holes but then it's gotta be re-plated.
Those spherical washers will help but things are "stacking up". 
IMHO your "z" section is too thin. A 1/4" bolt can bend that, and release the preload that this type of mounting relies upon. A 5/16 bolt can bend it even easier.
Just for reference, a 1/4" bolt can provide about 5,000 lbs tension, you can use it to hold about 1,000 lbs (one fifth). A 5/16 bolt can hold about 1500 lbs, can generate 7500 lbs tension.
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djkeev
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| Posted: Sat Mar 12, 2016 9:37 am Post subject: Re: ARB Awning, Making your own NO WELD gutter mount! |
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| Sodo wrote: |
You are so right about using two bolts there. I shoulda, especially because it's the fwd mount, and there are only two mounts. We are on the same page there. I will increase my bolt size to 8mm (=5/16") too. Maybe drill 2 holes but then it's gotta be re-plated.
Those spherical washers will help but things are "stacking up".
IMHO your "z" section is too thin. A 1/4" bolt can bend that, and release the preload that this type of mounting relies upon. A 5/16 bolt can bend it even easier.
Just for reference, a 1/4" bolt can provide about 5,000 lbs tension, you can use it to hold about 1,000 lbs (one fifth). A 5/16 bolt can hold about 1500 lbs, can generate 7500 lbs tension. |
Thanks for that info...... Something to consider........ ^^^ I didn't want to actually be TOLD that my "S" is wimpy...... I just thought I'd ask and you'd all say "oh no, that looks just fine!" 
Dave
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https://www.thesamba.com/vw/forum/viewtopic.php?t=482968&highlight=74+super+vert
Last edited by djkeev on Sat Mar 12, 2016 9:58 am; edited 1 time in total |
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djkeev
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djkeev
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| Posted: Sat Mar 12, 2016 9:52 am Post subject: Re: ARB Awning, Making your own NO WELD gutter mount! |
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Onto the rear mount!
Cut angle, resize, grind and file..... 10 minutes....
Cut clamping upper block, grind and file...... 5 minutes.......
Cut second "S" out of the "U" channel, resize, heat, bend, grind, file..... 12 minutes (using MAP gas) ......
Layout bottom Angle mount location......
Dave
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http://www.thesamba.com/vw/forum/viewtopic.php?p=6315537#6315537
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https://www.thesamba.com/vw/forum/viewtopic.php?t=482968&highlight=74+super+vert |
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djkeev
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DwarfVader
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| Posted: Sat Mar 12, 2016 11:53 am Post subject: Re: ARB Awning, Making your own NO WELD gutter mount! |
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Dave... You make the best threads.
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Kombi///M3
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| Posted: Sat Mar 12, 2016 1:16 pm Post subject: Re: ARB Awning, Making your own NO WELD gutter mount! |
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Great job! I like your approach.. I must'a missed the steel gauge you used..
What's the thickness?
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djkeev
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Sodo
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| Posted: Sun Mar 13, 2016 1:52 pm Post subject: Re: ARB Awning, Making your own NO WELD gutter mount! |
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Very nice Dave. I wouldn't worry about tamper-proof screws, get attractive screws, SS buttonheads. But if tamper-proof are available, they look good too. It's a lot of work to unbolt and you need a ladder, thieves won't do that much work. Wheels are more vulnerable, or the whole camper.
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'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered gearbox
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djkeev
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djkeev
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djkeev
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djkeev
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