Run-In Shed-in-a-Box Round, 12 ft. x 20 ft. x 8 ft.

Model #51376
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The Run-In Shed-in-a-Box takes our Run-In shelter and combines it with our "in-a-box" concept making the unit more practical and convenient than before. Get the perfect field run-in shade for horses, livestock and animals without dealing with multiple boxes. Whether you need extra field storage for hay or farming equipment, need some shade for your items or want shelter that is easily accessible to your animals, the Run-In Shed-in-a-Box is the perfect solution. Get instant shade and shelter for livestock that's practical and reliable.


SKU 51376
Assembly Manual Download (PDF)
Style Round
Material Polyethylene 7.5 oz
Frame Color Gray
Color Green
Size 12 x 20 x 8 ft.
Width 12 ft.
Length 20 ft.
Height 8 ft.
Rib Tubing Diameter 1.34 in.
Total Storage Area 241.11 sq. ft.
Total Storage Volume 1417 cu. ft.
Assembly Required Yes
Assembled Exterior Dimensions Width 145.48 in.
Assembled Exterior Dimensions Depth 238.66 in.
Assembled Exterior Dimensions Height 96.01 in.
Assembled Interior Dimensions Width 142.8 in.
Assembled Interior Dimensions Depth 235.98 in.
Assembled Interior Dimensions Height 94.67 in.
Door Opening Width Top 69.2
Door / Entrance Width Bottom 119 in.
Door / Entrance Height Outside 80.3 in.
Wall Height 65.55 in.
Peak Height 30.46 in.
Warranty 1 Year Limited
Waterproof Yes
Water-Resistant Yes
Run-In Shed-in-a-Box 12 x 20 x 8 ft. is rated 3.5 out of 5 by 11.
Rated 5 out of 5 by from great inexpensive way to keep your horse dry I previously purchased the 10' high run-in shelter and loved it. I am in a high wind and snow area. I was concerned it would blow over with the winds or collapse in the snow. The first really strong winds came and I was up and down all night worried about it. It held up just fine. I used augers on every leg. Next came the snow and once again I was up and down all night but it did great. I was so impressed with it, I bought a second one, the 8' shelter. I am very happy with both of them. The horses had no problem going in the shelter. As we installed, they walked through and were very curious. When finished, I fed inside and they were fine going right in.
Date published: 2017-02-22
Rated 5 out of 5 by from Long lasting I purchased a run in shelter 10 years ago and used it for equipment and hay storage. It was a great investment. It has stood up to the elements and hurricane Sandy!! Sadly I need a replacement cover and an end leg because our horse thought it was a hay buffet.
Date published: 2016-12-06
Rated 4 out of 5 by from It's a good building for the price and the institutions weren't bad. It took us 6 hours to get it all done.
Date published: 2018-10-14
Rated 4 out of 5 by from Run in shelter The shelter is pretty sturdy and was fairly easy to assemble- just time consuming. Our alpacas really like it and it seems like it will hold up for a while. The anchors that come with it were NOT good for our soil type. I have no idea how a person would ever get those in the ground.
Date published: 2018-05-30
Rated 4 out of 5 by from a lot of common sence the lack of instructions "suck" you got different size bolts, pipes and other pieces, you have to sort out all the pieces then use a lot of common sense, once you got all that it's just repeating each step, but note the first two arches are the key pieces with the 3 different size pipes and angle pieces, the tarp is a guessing game on how tight it should be, me first I let it lose then next day over tighten it for about an hour then I loosened the lower pipes and let it find it own relaxed position and then set the ratchet pieces till it felt about right, the screw down anchors, again common sense to use the only holes left and put the cables on after you got the tarp is in place it's just easier and the little rubber pieces is for the end on the bolts so the horse doesn't get hurt. With all that said I like it and at the farm we are at there will soon be a 2nd one, with more to follow, after all the first one was the hardest, now that I know how to do it and save time the rest will be easy. Jim from Herbertsville NJ
Date published: 2017-02-11
Rated 4 out of 5 by from Good structure for the price I just received this today, I like the product but the instructions are not helpful I need step by step and can't find them anywhere .
Date published: 2017-02-04
Rated 3 out of 5 by from More work than necessary First of all the Instructions are not up to par. Most important is that the pipes would not fit together, the inside of all the holes on one side of the pipes had to be deburred by hand which added more work than necessary. When they were drilled only the outside of the exit holes on the exterior of the pipes were deburred at the factory.
Date published: 2018-10-20
Rated 3 out of 5 by from Run-In Shelter 12 x 20 x 8 ft. I bought this less that a year ago. Wind cause the side to collapse- pipes bent.
Date published: 2017-03-31
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How tall are the side walls on this?

Asked by: Rachel
Hi Rachel, The side wall height for this model measures approximately 6' 5". Thank you
Answered by: Customer Service
Date published: 2018-07-26

Sku 51376 I need the cover!

Asked by: Tonic
Hello, The replacement cover for this model is Part #804731. For more detail and to place an order please give us a call at 1-800-932-9344. We are available 7 days a week for your convenience. Thank you
Answered by: Customer Service
Date published: 2018-10-30

How many years is the fabric lasting for on average?

Asked by: Kellykelly4
Hi Kelly, Fabric life is affected by application, location and the physical elements the shelter is exposed to and it varies greatly depending on how these variables are interacting with the material. If you would like to discuss this in further detail please feel free to reach out to us at 1-800-932-9344. Thank you
Answered by: Customer Service
Date published: 2018-05-29

Is this structure waterproof?

Asked by: Ypranch
Hello, Yes, this unit has a 3-layer polyethylene fabric cover with hot air fused seams that are 100% waterproof. If you would like to discuss this in more detail give us a call to 1-800-932-9344. Thank you
Answered by: Customer Service
Date published: 2018-02-26

What wind speeds can this withstand?

Asked by: Amanda
Hi Amanda, This unit in particular is not wind and snow rated. We do offer more robust shelters that are live load rated which may fit your needs. To discuss this further please give us a call at 1-800-932-9344. Thank you
Answered by: Customer Service
Date published: 2018-02-20

If the polyethylene cover rips, is there a repair procedure you can recommend?

Asked by: Philippe
Hello Philippe, We have heard from other customers that if their cover had a large tear you may be able to patch it with another piece of polyethylene and 3M spray adhesive # 90 or you can use may use Tear-Aid type A which is a transparent fabric repair. For smaller rips you can use heavy-duty duct tape. We do offer replacement covers for our shelters and this would be the best solution. If you have any other questions or concerns please feel free to contact us at 1-800-932-9344. Thank you
Answered by: Customer Service
Date published: 2018-02-06

Are the ratcheting tensioners supposed to be supplied with the kit? Mine didn't come with any.

Asked by: Marc9400
Hi Marc. The ratchets for securing the cover and end panels should be included. If you did not receive them, please send us an email at [email protected] so we can ship them out to you right away. Thank you
Answered by: ShelterLogic
Date published: 2017-11-28

Can this shelter be ordered with a white material instead of green?

Asked by: Jess
Hi Jess, We would be happy to help you order this shelter in white instead of green. Please give us a call at 1800-932-9344. Thank you
Answered by: ShelterLogic
Date published: 2017-11-09
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Features & Benefits

Big quality features. Value priced. Learn more about this product below.

  • Ready to build right out of the box: the Run-In Shed-in-a-Box is the perfect farming shade and shelter solution: use it for horses or other livestock, hay or farm equipment storage or protection

  • Our in-a-box concept for the farm: assembles easily and features easy to follow instructions

  • Features our patented ShelterLock Steel Stabilizers at every rib for a frame that is study and solid

  • Our 1 3/8 in. pipe diameter frame is made from high quality steel that is powder coated for corrosion and rust protection

  • The Run-In Shed-in-a-Box features a sturdy ripstop-tough engineered 7.5 oz fabric cover that is UV treated inside and out for protection against fading and mold

  • Our fabric cover is heat sealed, not sewn for a waterproof building that will keep your items dry

  • Your building cover will stay taught on the frame thanks to the Ratchet and Easy-Slide system

  • Protective boots on all corners of the unit provide added protection to animals from injury