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Frank

The Death of an Arch

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My first arch is history I am trying to make a 20 foot arch out of gray PVC, 1 inch, using two 10 foot sections to cross my sidewalk. I cut a few notches in one end so it would be easy to remove and drilled a 1/4 inch hole for a bolt. My first placement of the re bar had the center too low. I moved the re bar closer and POW, it broke as I tried to bend it. Any idea how close I can place the re bar on a 20 foot arch? Rather than start over I am think of using a gray 3/4 inch pipe and place on the inside were the two 10 foot pieces meet?

post-7463-129571171737_thumb.jpg

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I have 16 foot arches (two 8' pieces connected with a coupler). The bases are about 13.5 feet apart and the arch is about 4.5' high. Even at that height, the coupler and arch creaks a little bit when I get it in position.

How high do you want the arch in the center? That's a good starting point.

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You can't bend the stuff into a "U" without breaking it (as you learned) but it IS possible to do what you want - but it will take some effort.

You can use a blow torch to carefully heat the PVC to make it pliable and then bend it to the shape you want. Obviously, you won't be able to have lights on the section being torched and once it's bent you won't be able to use your "wrapper" so you'll to do the lights the hard way.

But it can be done.

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Is 3/4" PVC stable enough for this? 1" PVC, even the gray stuff, is pretty rigid. I use 1/2" for my arches which are about 11.5" long (they're 10' long along the ground).

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I have found that that 14 foot apart works for my 20 foot arches. But they are made out of one piece of 20 foot 1" schedule 40 water pipe that I purchased from a local plumbing supply. Instead of putting 2 pieces together. That puts the top of the arch around six foot

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My first arch is history I am trying to make a 20 foot arch out of gray PVC, 1 inch, using two 10 foot sections to cross my sidewalk. I cut a few notches in one end so it would be easy to remove and drilled a 1/4 inch hole for a bolt. My first placement of the re bar had the center too low. I moved the re bar closer and POW, it broke as I tried to bend it. Any idea how close I can place the re bar on a 20 foot arch? Rather than start over I am think of using a gray 3/4 inch pipe and place on the inside were the two 10 foot pieces meet?

Why don't you just leave it like that. I've never seen one of those before.

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I have 16 foot arches (two 8' pieces connected with a coupler). The bases are about 13.5 feet apart and the arch is about 4.5' high. Even at that height, the coupler and arch creaks a little bit when I get it in position.

How high do you want the arch in the center? That's a good starting point.

This one arch goes across my sidewalk to the front door. I was hoping it would be high enough for someone to walk under it. I could let it sit in the sun. I took it straight from the garage. I am think of using a piece of 3/4 inside the 1 inch and see if that bends? Or do what Ryan does and use fittings.

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This one arch goes across my sidewalk to the front door. I was hoping it would be high enough for someone to walk under it. I could let it sit in the sun. I took it straight from the garage. I am think of using a piece of 3/4 inside the 1 inch and see if that bends? Or do what Ryan does and use fittings.

You have to think of an arch as a segment of a circle. I think you want more of a "U". So you'll either have to heat it to get it to bend or use the fittings.

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