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Our 2nd High Tunnel Construction

3/20/2013

11 Comments

 
Our Second High Tunnel frame is almost done! We just have to put on the plastic....More pictures to come when that happens. In the meantime, I thought I would explain how we built this thing! We started out by orienting the 4 posts to where we feel was mostly level and would allow plenty of sunlight along with nice airflow. This high tunnel measures 24' x 120'. So now to use some of that all important geometry that we learned so very long ago...hypotenuse anyone? How about Pythagorean Theory? We measure one end, and be sure it is 24'. Then we measure out 120' from one post. This angle must be a 90 degree angle in order for the layout of the frame to be square. After some calculations and multiple measures, we ended up with four posts that were the right "square". We then made a template that would give us exact spacing of 4' between each ground stake. After putting a string the length of the 120' for a straight line, we drove the stakes at least 30" down, on both sides. It is important to be sure that all of the stakes are level, since your arches will be sitting on these stakes. Next we assembled arches and raised them up and sat them on the ground stakes..30 arches later, we were done. Now it is starting to look like something. We connect a purlin starting from one end all the way to the other, we utilize that same template that we used on the ground...this ensures that the top spacing of the arches match the bottom stakes. After the center purlin, we connect both side purlins as well. Next we add the cross braces, which connect to both sides of the arches. Once that is done, it is time to add the sideboards for the plastic to attach to, they simply are screwed into the arches. These run the length of the high tunnel and have grooves in them to snap in a zig zag wire to hold the plastic tight. On to the baseboards, these run along the length and they add strength and stability to the structure. A carriage bolt is drilled through the wood and a clamp holds the ground stake to the baseboard. WInd Braces are attached at all four ends, they run at an angle from the top of the end ground stake in a downward angle to about the 5th (or 20 ft) arch. These four braces are vital for the strength of the structure. We are almost done...Next we will be building ends, so we use a clamp that goes around the arch and connects to a clip that will attach to a 4" wide piece of wood. We have to be sure that it is spaced out appropriately along the end arches for reasonable framing out of the end walls. Once the clamps and the clip are in place, we run a piece of hardware or a track that goes over the entire end arch. This will be the track that we will use zig zag wire and hold the plastic tight. Our frame is now up and we just have to wait for a very calm day to put some poly on! We are really looking forward to having TWO high tunnels to grow some early veggies in, and keep some veggies going longer into the season! Happy Spring TIme!
11 Comments
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7/29/2013 10:20:34 pm

For such works all workers should have protective equipment.

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11/1/2013 02:56:07 pm

Your job is really appreciable to us! I think you conquer a challenge that's very hard to be done. Thanks for sharing...

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8/6/2013 09:32:37 pm

For such large construction need to use a forklift

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10/8/2013 08:43:30 pm

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10/23/2013 04:57:16 pm

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10/29/2013 02:58:59 am

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11/1/2013 02:41:34 pm

You and your team did a wonderful job by constructing High Tunnel Frame. Our soul fully praise to you for doing that excellent job. Thanks a lot..

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1/2/2014 03:53:43 pm

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    John Dove, 30
    Farmer and Owner of 
    Love Dove Farms

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