…… Bending metal pole for cold frames

kyrsyan

Has No Life - Lives on TB
I'm not even sure where to start on this. I want to do a fall winter garden. One of the problems with doing one here is the need for some protection. Not much but at least some.

I don't want to do glass or greenhouse plastic for several reasons. But before I even get to that point... I need a frame.

Now I've been looking at pvc and carbon fiber poles. Carbon fiber wouldn't hold up to our winter winds. Heck, even emc has problems with the wind occasionally.

I have a stash of pvc and I'm going to use that. But that likely will only cover two of the garden beds. I mean, two of them if I do poles every two feet on hopes of them having more strength. Maybe every 18 inches.

I have piles of old one inch tent poles. And access to used 1" emc. What I don't have is any experience whatsoever in bending poles without accidentally creasing them.

Family says get a pole bender. And that they are self explanatory. I'm not really feeling that.

Videos say build a jig. But how do I determine what the arc of the jog needs to be? And still, how do I do it and not crease the pole?

And after I work through allow those poles... I have a pile of poles from trampoline frames. Harbor Freight has a hydraulic bender that can bed those. But maybe overkill? And how do I do it to get a consistent even bend, not just a bend in one spot? Especially with poles that already have a bend to them.

So help, please. Eventually I want them all to be metal poles. Because I don't want to have to keep replacing poles.
 

summerthyme

Administrator
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Look on YouTube for videos demonstrating the various benders and jigs. In my limited experience, the time spent in building, essentially a homemade, 1 person power (maybe with some hydraulic help!) Bender is more that worth it. Because to make garden tunnels or high tunnels that will withstand ice or rare snow, you need LOTS of poles bent into as close replicas of each other as is practical!

Then, maybe the guys who know metals could give you some specifics.

Summerthyme
 

kyrsyan

Has No Life - Lives on TB
It's not the expensive. It's that I always somehow manage to crease the bloody poles. I don't know why/how. I've gone slowly. I start at the ends, not the middle. I've packed them with sand.

I debated buying the jigs sold for bending greenhouse poles. But the arc is wrong. It's normally meant fr a 10 ft or 20 ft spread and a bunch of height. I only need a 6.5 foot spread with a 4ft at center height.
 

tom-j

Contributing Member
Bootstrap Farmer has a jig for 6 foot hoops.
I purchased a jig for 12 foot hoops and it worked fine.
I believe their jigs are designed for 1 3/8 top rail from a cyclone fence.

 

kyrsyan

Has No Life - Lives on TB
Bootstrap Farmer has a jig for 6 foot hoops.
I purchased a jig for 12 foot hoops and it worked fine.
I believe their jigs are designed for 1 3/8 top rail from a cyclone fence.

Thank you! I will dig further.
 

Millwright

Knuckle Dragger
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A tube roller is the right tool for this project.

Hobo Freight has one fairly cheep, 250bux, look for discount coupons.


image_25678.jpg
 

RememberGoliad

Veteran Member
I use this and just put 3-5 bends in it. Never have torn a tarp or plastic sheet. Rounds the bends well enough they don't poke through the covering. (Odd number of bends so that it doesn't wind up with a flat top.)


12 Ton Hydraulic Pipe Bender
 
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