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Re: [Market-farming] For those who have built tunnels using Johnny'shoops bender
- From: Todd Lister <toddlister1 AT gmail.com>
- To: Tom <tomsgardens AT yahoo.com>, Market Farming <market-farming AT lists.ibiblio.org>
- Subject: Re: [Market-farming] For those who have built tunnels using Johnny'shoops bender
- Date: Sat, 18 Feb 2012 20:06:54 -0500
This approach is not unusual and as a 35 year builder I have total confidence in the bracing.
My example is applied to a house made of 1.5" pipe.
The original question was likely much smaller pipe.
I would have no issue with this approach as long as there was corner bracing.
Connectors can be an issue. Commercial hoop house manufacturers offer houses with 4'+ side walls.
It's all about the bracing.
http://www.greenhousemegastore.com/product/30-foot-cold-frame-sidewalls
Farmtek also has tall wall houses.
http://www.farmtek.com/farm/supplies/cat1a;ft1_greenhouses_accessories
On Sat, Feb 18, 2012 at 7:38 PM, Tom <tomsgardens AT yahoo.com> wrote:
I haven't built one of these structures, but I have some building experience and I would be quite concerned about putting 2 feet of the post into the ground and leaving 4 feet out for the hoops to sit atop. That sounds very shaky to me. I doubt if these posts are designed to withstand the kind of force that would result from the weight of the structure plus wind acting on a four foot lever arm at the top of each post. That's a lot of leverage for a thin steel post to resist. In a moderate to strong wind I think one of two things would happen. Either the posts would fail and bend at the ground level or they would rip out of the ground. I would even worry about just the spreading force of the hoops being enough to bend the tops of the posts outward a bit -- maybe a lot.I built a Hanley-style hoop house and I had 13 two foot rebar lengths pull out of the ground simultaneously during a fairly strong wind, and that house had no flat sides.
In short, I think you will need to build a more substantial four foot wall to rest your hoops on - something that can provide some serious lateral stiffness both along the length of the wall and perpendicular to the wall.
==============
Tom at Tom's Gardens
Cut Flowers & Veggies
Northern Lower Michigan
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-
[Market-farming] For those who have built tunnels using Johnny's hoops bender,
Etienne Goyer, 02/18/2012
-
Re: [Market-farming] For those who have built tunnels using Johnny'shoops bender,
MAsteveINE, 02/18/2012
-
Re: [Market-farming] For those who have built tunnels using Johnny'shoops bender,
Etienne Goyer, 02/18/2012
-
Re: [Market-farming] For those who have built tunnels using Johnny'shoops bender,
Shoemaker, William H, 02/18/2012
-
Re: [Market-farming] For those who have built tunnels using Johnny'shoops bender,
Etienne Goyer, 02/18/2012
- Re: [Market-farming] For those who have built tunnels using Johnny'shoops bender, Todd Lister, 02/18/2012
-
Re: [Market-farming] For those who have built tunnels using Johnny'shoops bender,
Tom, 02/18/2012
- Re: [Market-farming] For those who have built tunnels using Johnny'shoops bender, Todd Lister, 02/18/2012
- Re: [Market-farming] For those who have built tunnels using Johnny'shoops bender, Etienne Goyer, 02/19/2012
-
Re: [Market-farming] For those who have built tunnels using Johnny'shoops bender,
Etienne Goyer, 02/18/2012
- Re: [Market-farming] For those who have built tunnels usingJohnny'shoops bender, MAsteveINE, 02/18/2012
-
Re: [Market-farming] For those who have built tunnels using Johnny'shoops bender,
Shoemaker, William H, 02/18/2012
-
Re: [Market-farming] For those who have built tunnels using Johnny'shoops bender,
Etienne Goyer, 02/18/2012
- Re: [Market-farming] For those who have built tunnels using Johnny'shoops bender, Beth Spaugh, 02/18/2012
- Re: [Market-farming] For those who have built tunnels using Johnny's hoops bender, Jay Sleichter, 02/18/2012
- <Possible follow-up(s)>
- [Market-farming] For those who have built tunnels using Johnny's hoops bender, Two Onion Farm, 02/18/2012
-
Re: [Market-farming] For those who have built tunnels using Johnny'shoops bender,
MAsteveINE, 02/18/2012
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