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Irrigation bridge building
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4020
Posted 2/24/2013 11:20 (#2922308)
Subject: Irrigation bridge building


Does anyone have a good design for a bridge to get an irrigation tower across a ditch? The bridges vary from about 30 to 40 feet long and about 4ft. wide. Most of the ones I have seed are made out of pipe but I think I would rather work with something with straight sides. Anyway, whatever works.
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Five Lock Boll
Posted 2/24/2013 11:47 (#2922357 - in reply to #2922308)
Subject: RE: Irrigation bridge building


Northeast Louisiana		We have some made from 3 pieces of old drill stem pipe with sucker rod slats. They are good up to about 25', anything longer and they need a truss built under them. We have some 40' bridges made from 2 pieces of sch 40 8" pipeline pipe with drill stem slats that work real well for bigger ditches. Then we have a bunch made from 2 pieces of 8" channel with 2" channel cross pieces. The channel iron ones are far easier to work with but cost more to build because of new iron vs salvage. I don't have any pictures but can get you some if you like.
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Kel1306
Posted 2/24/2013 12:20 (#2922430 - in reply to #2922357)
Subject: RE: Irrigation bridge building


Wyoming		I have seen some that were made from 3 railroad rails turned upside down. They left about a 1 inch space between the rails, and held them together in about four places along the lenth of the rails. Solid as can be, but I think the rail might be hard to come by.
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ChrisTN
Posted 2/24/2013 12:22 (#2922435 - in reply to #2922357)
Subject: Re: Irrigation bridge building



Ethridge, TN		I've got some really long bridges, up to 80', longer ones are 5' wide. These are an arched bridge made of angle iron. Purchased from John's Welding and Tool, Nebraska. They have jigs for the bridges, so they can make them quite readily. For what we needed, price they quoted, we couldn't justify building our own, especially on the real long ones.

http://www.johnsweldingandtool.com/Johns/Bridges.html
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TJG in MS
Posted 2/24/2013 16:59 (#2923000 - in reply to #2922357)
Subject: Re: Irrigation bridge building


Itta Bena Mississippi		Old cotton trailers work pretty good.
Tom
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farmerboy50
Posted 2/25/2013 20:42 (#2926096 - in reply to #2923000)
Subject: Re: Irrigation bridge building


West Texas		Is there anything an old cotton trailer isn't good for.......
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Big Ben
Posted 2/24/2013 12:54 (#2922513 - in reply to #2922308)
Subject: RE: Irrigation bridge building


Columbia Basin, Ephrata, WA		Here's a few pictures of my limited experience with building pivot bridges, last month. We built four from 20 to 28 feet long. The two 20' ones don't have the trussing under them. I don't know if these are built right or wrong, but all the materials were only worth $150 per ton if not used for this.




(bridges 1.jpg)



(bridges 2.jpg)



(bridges 3.jpg)



Attachments
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Attachments bridges 1.jpg (55KB - 66 downloads)
Attachments bridges 2.jpg (99KB - 72 downloads)
Attachments bridges 3.jpg (99KB - 77 downloads)
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Duck
Posted 2/25/2013 20:35 (#2926065 - in reply to #2922513)
Subject: RE: Irrigation bridge building


West Tennessee		Some of the guys around here are only using two pivot pipes with angle welded across it on bridges up to 25 ft long. They are using three wide with a similar trussing like you are using. Are those old Reinke pipe? By the way, nice collection of Valley signs.......
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Big Ben
Posted 2/25/2013 20:57 (#2926155 - in reply to #2926065)
Subject: RE: Irrigation bridge building


Columbia Basin, Ephrata, WA		It's old Gifford-Hill pipe; the sign is up on the north wall.
I thought about using fewer lengths of pipe, but this stuff was really rusty. That and I ran out of suitcase weights so I wasn't able to test the pipe to failure. I figured I was better safe than sorry.



(image.jpg)



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Attachments image.jpg (43KB - 64 downloads)
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jkseed76
Posted 2/24/2013 14:18 (#2922697 - in reply to #2922308)
Subject: RE: Irrigation bridge building


central mn		I've heard of guys buying old semi flatbeds and using them for the longer spans.
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golfnut
Posted 2/24/2013 18:37 (#2923267 - in reply to #2922308)
Subject: Re: Irrigation bridge building



Central Nebraska		Geneva Welding in Geneva Nebraska makes good bridges.
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