Short description:

Moveable 16' X 48' Hoop house compatible with year-round vegetable growing rotations as described in "The Four Season Harvest" and elsewhere that is large enough to be useful but small enough to be constructed on farm with basic tools and easily sourced materials. Hoop house uses multiple independent wheel assemblies during moves that enable one or two persons to move the house manually.

Type:

Season extension

Stage: Functional Prototype

Originally submitted by Oxbow Farm

Low-cost mobile hoop house

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Submitted by Oxbow Farm on Sun, 03/18/2012 - 17:16

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Wiki Editors: Oxbow Farm (13 edits)

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Prototype created by Oxbow Farm

Bill of Materials:

Item	Quantity	Cost (approximate)
1.75" Toprail Fence Tubing	38	$418
0.5" EMT Conduit	19	$41
0.75" EMT Conduit	10	$43
2" U-bolts	26	$28
2X2" Angle Iron	6	$138
1.75" brace bands	40	$26
1.5" carriage bolts and nuts	40	$11
4" carriage bolts and nuts	20	$13
4.5" eye bolts and nuts	8	$10
Gabion Basket wire roll	1	$32
Finned Super Stakes	8	$12
3 foot sections 0.125" Aircraft cable	16	$15
0.125" cable ferrules	32	$24
2" coated exterior screws	many	$25
Self-tapping screws	38	$8
1.75" Greenhouse Cross-Connectors	13	$20
10 foot 1X4" boards	20	$37
8 foot 2X4" boards	6	$30
8 foot 1X2" furring strips	22	$28
28 footX50 foot Greenhouse Plastic	1	$130

Metal Cut List:

Part	Stock	No.	Length	Holes	Bend?
Half Bow	Toprail Tube	26	10’	NA	YES
Arch Piece	Toprail Tube	13	5’	NA	YES
Ridge Pole	Toprail Tube	5	10’	NA	NO
Purlin	¾” EMT Conduit	10	10’	NA	NO
Wind Brace	1/2” EMT Conduit	12	10’	2	YES
Short Truss Piece	1/2” EMT Conduit	9	3.5’	NA	NO
Long Truss Piece	1/2” EMT Conduit	4	4.5’	2	NO
Endwall Brace	1/2” EMT Conduit	4	5’	2	NO
Long Rail	2X2 Angle Iron	4	20’	12	NA
Short Rail	2X2 Angle Iron	2	10’	8	NA
Rail Splice	2X2 Angle Iron	4	2’	4	NA

Wood Cut List:

Part	Stock	No.	Length
Hipboard	1x4	10	10’
Hipboard Splice	1x4	8	18”
Endwall Hipboard	1x4	4	4’
Endwall Anchor Brace	1x4	4	5’
Endwall Frame	1x4	8	6’
Peak Gusset	1x4 or plywood	2	18
Lintel	2x4	2	8’
Door Post	2x4	4	5.5’
Endwall Anchor	2X4	4	2.5’

Tools

Vital Tools

Drill Press for drilling holes in rails and brace pieces, I used a bench-top model and set it on the ground and used makeshift cribbing and the other pieces of angle iron to make a race to slide the rail being drilled.
Metal cutting device, I used an angle grinder and abrasive cutoff wheels.
Tubing Bender, I used the DY-12 bender from Lost Creek Greehouse, the same or very similar bender is being produced by Lost Creek for Johnny’s and sold in their catalog. Usually Lost Creek has better shipping, it was free when I bought ours.
Small Tubing Bender for bending the “Gothic Arch” ,this you have to DIY. I will try and get info about this up soon but there are better methods than the way we did it.
Cordless Screwgun/Drill
Rugged flat surface for bending hoops
Flat surface for assembling hoops
Hammer
Heavy metal object with a flat surface to use as an anvil, an actual anvil would be awesome, a splitting wedge or splitting maul driven into a chunk of wood was what we used.
Metal marking punch
Drill bits
5/16ths ratchets and wrenches