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Old 08-09-2016, 03:47 PM
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camdigger camdigger is offline
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Default Portable shelter from knock-down gantries

I needed a portable shelter for an outdoor exhibit in a show in a couple of weeks. I could have bought a pop-up shelter for under $150 that would have given a sun shade, but little more. I have used tarp shelters both at work and while camping for years. I also happen to have a knock-down gantry....

Originally, the knockdown gantry was built to do some service work on our water well, which sits inside an 8' x 8' x 8' building. I built the gantry to fit inside. I can put it up and take it down by myself inside the building and end up with w gantry that is less than 6" below the ceiling. I conservatively rate it for #300, but I know I could go a lot more if I built a truss style cross beam.

I wanted a more or less square shelter, that rain water would not sit on, so it needed a slope. I built another set of end brackets and cut some longer pipe for the second set of legs. The brackets are built out of 2 7/8" production tubing which is a slip fit over 2 3/8" production tubing. Both sizes are common as dirt hereabouts.

The tarp is held on with simple S hooks made of 1/4" rod I put in the base of the outside legs and a combination of rope and tarp straps. It took my son and I 20 minutes to set up and me 15 minutes to tear down and stow away by myself. The ends of the pipe are a bit hard on the cheap tarp, but a little padding or even some grinding would solve that.

The design of the end brackets should be clear enough from the photos. I built two styles, one, the legs screw into couplings and the other was all built with slip fits. I prefer the slip fit ones as the threaded end is painful to put together.
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Design to 0.001", measure to 1/32", cut with an axe, grind to fit..
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Old 08-09-2016, 04:13 PM
kbs2244 kbs2244 is offline
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Did you calculate a snow load on it?
Seriously, the only thing I may want to add would be a ridge pole from the mid point of each beam to aid in rain draining.
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Old 08-09-2016, 04:51 PM
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Nice.. Looks like a setup I used 30years ago for the blacksmithing demos I did..

What's the show and what are you showing?
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Old 08-09-2016, 07:46 PM
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Good thinking, that will do you a fine job... nice work on the Y joints too.
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Old 08-09-2016, 07:47 PM
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Quote:
Originally Posted by allessence View Post
Nice.. Looks like a setup I used 30years ago for the blacksmithing demos I did..

What's the show and what are you showing?
I was invited to show my stuff at Maker Faire in Calgary Aug 20-21.
I am taking the machine in my Avatar, my mini-dozer, the knock down shelter, and the new rope maker. Our eldest daughter wants a small spot to show off her costume stuff. Not sure if any of the rest are taking anything.
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Design to 0.001", measure to 1/32", cut with an axe, grind to fit..
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