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10.19.18

Fencing When Designing a Horse Farm: Options to Consider

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Fences are one of the most common discussion points among the Blackburn team and clients when we’re designing an equestrian facility. The options listed below are certainly not exhaustive but reflect what we commonly find in many of our projects.

Some options are better suited for pastures, while others are more appropriate for small stall turnouts. We’ve tried to identify a variety of approaches that meet the safety needs for horses, limit maintenance needs, and often fall within neighborhood guidelines. 

1. Steel rail fencing is an option for stable turnouts. The material is available in a thinner profile so it isn’t as visually heavy and it can be painted black or another dark color so that it does not have the “ranch” appearance seen with galvanized steel pipe corrals. The up-front cost is higher but the material is durable and will have little-to-no maintenance needs.

2. Woodguard polymer coated wood fencing is treated wood with a non-toxic, non-chipping surface covering. The wood grain is still visible but the finish has some of the plastic texture of the polymer. This product allows for fencing to be constructed similar to a wood fence, with the rails attached to the face of the posts. The result is a stronger, safer fence. Woodguard has a 20-year warranty. The cost is similar to wood board fencing but the maintenance needs are less. While the manufacturers state that this product is resistant to cribbing, we would recommend that a hot-wire be provided at the top rail to discourage the horses from chewing. This material would be acceptable to use for both stall turnouts and paddocks. It offers the appearance of a traditional 3- or 4-board wood fence without the significant maintenance demands. https://www.wood-guard.com/horse-fencing/

3. High Tensile Polymer (HTP) comes in both rail and wire styles and is typically mounted on wood posts. The rail is typically 5” wide and from a distance will appear similar to wood board fencing. Because wire fencing has a lower visibility, we suggest using a thicker top board so that the horses can more easily identify the barrier. The HTP materials’ inherent flexibility makes these products durable and resistant to horses leaning on or running into the fence. Typically, these are more suited to large pastures or for perimeter fencing and less so for stall turnouts. The darker colors tend to exhibit a chalky appearance over time.

4. Rubber fencing is a durable, flexible, and low profile fencing material and is similar to the HTP fencing. We’ve not seen this product used as often and we understand that there’s a risk that the strings of the fabric (which is an internal support for the rubber) can become exposed and offer a hazard for horses to chew on. A hot-wire at the top of the fence may combat this risk.

The advantages of rubber, HTP or any type strap fencing is the posts can be set further apart which is useful when its highly visible and you want to minimize the number of posts. The fencing is flexible and resists breaking when a limb or tree falls on it therefore it’s a good material for perimeter fencing large acreage and where it encounters wooded areas. This is safer if/when a horse runs into the fence; especially a problem on larger paddocks when horses can get some speed and not be able to slow down.

5. HDPE is a post and board fencing material. It’s stronger than PVC and performs better in all weather conditions, but the primary issue is in the assembly of the fence. The rails are set between posts, instead of fastened to the face, and can pop out if the fence is not secured properly. Its requires more frequent posts which tends to look busy and it’s difficult to bend or angle corners because of the assembly method. The Blackburn team isn’t particularly fond of this material because it can look clunky and isn’t the safest option. http://www.amberwayequine.com/products/hdpe-fencing-2/

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10.17.18

Recommendations for Adding Glass in a Horse Barn

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What’s the safest way to incorporate glass in a horse barn? If you’ve been following our work, you already know that Blackburn Architects’ mission is to promote as much natural light and ventilation in horse structures as possible. Naturally, this means we add a lot of windows to our designs. In its safety recommendations for the stable, Rutgers NJ Agricultural Experiment Station cautions that “windows need to be inaccessible to horses and livestock, covered with bars or screening and made of safety glass.” (https://esc.rutgers.edu/fact_sheet/safety-recommendations-for-the-stable-barn-yard-and-horselivestock-structures/). So how do our architects protect the horses and still use a lot of glass in our designs?

1. Use Tempered & Laminated Glass
We recommend that all glass in a horse stable be tempered, including glass that’s laminated. Tempering and lamination do two separate but similar things to increase the safety of glass if/when it breaks: Tempering makes the glass break into small chunks as opposed to slivers and shards, while the lamination gives the glass a slightly greater resistance to breaking and keeps the glass in place when and if it breaks.

Laminated glass consists of a clear plastic laminate sandwiched by glass on both sides. Since horses have access to both sides of a glazing unit, ideally both sides should be laminated and tempered. If this approach is too costly for your budget, stick with everything being tempered and omit the lamination. Laminated glass does not always age as well as tempering. The laminate can shrink and pull in from the corners of the glass, and eventually become visible over time. We prefer tempering.

2. Minimum Thickness of Glass and Airspace
To arrive at the minimum thickness of glass, work backwards from the depth of the frame, minus about 1/4”. Each glass manufacturer determines what spacer sizes they offer. Understand that the more airspace you can allow the better, but each manufacturer works with a few different pre-set size spacers. Use the largest one that still allows the glazing unit to fit within the frame.

3. Special Considerations for Cold Climates
In cold climates, we specify glass with a high solar gain and low emissivity. In technical terms, the glass meets the following guidelines:
1. A Solar Heat Gain Coefficient (SHGC) around 0.55
2. A U-value of less than 0.33
3. A higher value Visible Transmission (VT)
4. Use double-paned glazing units with low-e gas that has a vacuum sealed gasket between the panes of glass. The pocket between panes of glass is filled with an insulation gas, most typically argon.
5. Consider using low emissive (low-e) glass panes (low-e prevents the transfer of heat from warm to cold). The low-e coating (typically a metallic oxide) should be on outside of the innermost pane of glass.

There are pros and cons that should be considered with each option 1-5 above. For instance, with #4, over time and if the gasket seal fails, you can begin to see condensation between the panes of glass. Whereas with #5, you may be able to see the coating from certain angles, especially if you are wearing polarized sunglasses. Since the advantages are a bit more obvious, and similar to one another (i.e. tempered vs laminated, and low-e gas vs low-e coated glass), here is a summary of some of the disadvantages to each option:

Tempered only – glass may still shatter (in harmless pieces) and fall to the ground.
Laminated only – laminate can discolor over time and shrink in from the corners of the glass.

Low-e gas filled glazing unit – if the gasket fails, condensation can form in between the glass.
Low-e coated glass – may be visible in certain light conditions, or when wearing polarized sunglasses. You can sometimes see this on automobile glass.

To summarize, a good starting place for adding glass to your barn begins with tempered glass, meeting the SHGC and U-values recommended above. A step beyond this is low-e coated glass, since with #4 (low-e gas) you can expect the gaskets to fail at some point, and the glazing unit will need to be replaced. If the coating of the low-e coated glass is too “visible,” then low-e gas may be the better option, with the expectation that you may need to replace some of them again in 10 to 20 years, if and when the gaskets fail.

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06.22.12

About Stable Minded: An Equestrian Design Blog

“When you take a horse out of its comfort zone—the wild—it’s your obligation to create an environment that protects its health and safety. A poorly designed barn can be worse than no barn at all.” – John Blackburn

John Blackburn knows barns. As Blackburn’s owner and senior principal for the past 25 years, John has designed over 150 equestrian facilities across the United States and abroad.

In his blog, Stable Minded, John rhapsodizes about the design process behind our horse barns and equine facilities as only he can. His blogs cover a variety of equestrian news and topics: from the story behind projects we’ve designed to equestrian and design issues, such as how to increase natural lighting in barns. For those of you with questions or comments about the nitty-gritty details we face when designing barns, John considers his blog an open forum to discuss what’s on your mind.

If you’re curious about the architectural process, like to view construction photos from start to finish, or have questions about how it all works, we invite you to read and comment at Stable Minded. It might not be literally straight from the horse’s mouth, but we like to think it’s pretty close.

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