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Hamilton County SWCD News

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Noblesville West Middle School Garden Club and HCSWCD Partner to Develop Accessible Raised Garden Beds

7/24/2019

6 Comments

 
Andrew Fritz, Urban Agriculture Conservationist
Update (9/15/2022) -  Andrew (the author of this article and designer of the garden beds) made a big move to California in 2020. His work with the Placer (CA) Resource Conservation District allowed him to keep improving on these plans and create several resources to help you build your own accessible raised garden beds.  

Find a materials and supplies list, an online model, and build instructions on this website: ​http://placerrcd.org/projects/accessibleraisedbed/placerrcd.org/projects/accessibleraisedbed/
Picture
Accessible raised garden beds offer accessibility for persons with physical disabilities, persons who use a wheelchair, or for some who experience limitations in their physical range of motion. This poses a unique opportunity to explore novel and sustainable ways of creating a raised garden bed to meet the needs of persons with physical disabilities and support a healthy garden. For a raised garden bed to be successful, it must support a lot of weight especially when the soil is wet, be deep enough for roots to grow, allow for persons in wheelchairs to not only fit underneath the raised bed but be able to reach across it as well, and it should last for more than a few years by delaying decay while avoiding treated lumber for food safety purposes.

But this is a opportunity that Emily Crapnell, Noblesville West Middle School science teacher and Garden Club sponsor, reached out to the HCSWCD urban agriculture program for assistance in 2018. The Garden Club, started in 2013, was in the process of a renovating their garden space which now required raised beds with some of them being accessible.

Traditional accessible raised garden beds (like this one) tend to rot or sag within a few years and do not allow for a person in a chair to reasonably reach all areas of the garden. Other raised bed options were cost prohibitive, like the Terraform Wheelchair Accessible Garden. Furthermore, the VegTrug, regretfully not discovered until this year, has a biodegradable permeable liner that allows water to come into contact with the wood. This means that the liner would need to be replaced on occasion presenting a cumbersome maintenance challenge.

Design Thoughts

PictureA conceptual model built using SketchUp to explore its potential usability
With no other viable options to meet our needs, we decided to design and build one ourselves. After some searching, we discovered accessible raised beds from the Sedona Winds Assisted Living Healing Garden, which became our primary source of inspiration. The design was contemporary, clean, and used sturdy construction that would hold up over time. Conversations with Sedona Winds indicated that they were a success, too.

After conceptualizing the design through sketching and diagramming, the design was imported
 in SketchUp to help us visualize how users could interact with it. 

The materials 
being used varied in size to achieve the look we were hoping for. We avoided using treated lumber and used only food-grade plastics (HDPE) to line the trough of the bed. The bottom of the trough would include a drainage pipe to decrease water-logging and, therefore, weight. Furthermore, the design would be fitted with irrigation.

Additional Model Images

Constructing First Raised Garden Bed

Together, we built the first bed to work out any kinks. ​Ideally, the project would require at least two people. And, if you had to build more than one, you could do so easily by cutting two (or more) of everything you needed.

Finished Product

The finished beds look and function as planned! Should you choose to construct something similar, consider the following recommendations:
  • Place pavers or bricks on the bottom of the beds to keep the wood away from the mulch. This will keep the feet dry and less likely to rot prematurely.
  • Using HDPE as the liner is an excellent choice. However, it is difficult to seal with regular silicon caulking. There are special methods to be used since HDPE is fairly inert and usually is welded due to its high melting point (which is why it is regarded as food-safe). Click this link to learn more about ways to seal HDPE to prevent leaks. Keep in mind that the method of creating tight seams may, in and of itself, not be food-safe. Welding is likely the safest method.
  • Consider taking the extra (and timely) step of sealing the wood with a food-safe wood sealer. There are many sources online and advise you do your own research as it is difficult to independently verify the safety of these products. That being said, sealing the outside of the raised garden bed should be permissible since it is not coming into direct contact with the food or plants.
Picture
An oblique view of the finished bed reveals the drainage pip and irrigation. Leaks in the liner (discussed above) can be seen.
Picture
A close-up of the irrigation. There is both a spray option and a soaker hose.
Picture
Picture
6 Comments
Katrinka Hibler link
6/9/2020 07:33:59 pm

Hi We are looking into building these at our school gardens. Do you have plans or design modifications from what you have posted on line that you could share?
Is

Reply
Andrew Fritz link
6/14/2020 09:19:40 am

Hello, Katrina! Yes, I do have a few design modifications that would be helpful for you to consider. Please feel free to contact me by email at andrew.fritz@hamiltoncounty.in.gov or call our office at (317) 446-6212.

Reply
Dana Carns
1/6/2022 10:07:14 am

would love to have some built for our nursing home residents. Do you have blue prints and design modifications you can share? Thanks

Thomas Hermann
6/14/2020 02:06:25 pm

Do you have a blue print? I am looking at doing this for my eagle project.

Thanks,

Thomas Hermann

Reply
Jen Schultz
4/4/2022 08:08:22 pm

Hi! My son is working with one of our community garden groups to build handicap accessible raised beds at one of our junior highs as part of his Eagle Scout project. Three questions for you. What bed width did you use and has it been functional? What height do you have the underside of the bed at? And, what is the overall height of the bed? Thanks!!

Reply
Claire Lane
7/28/2022 12:55:09 pm

See the update at the top of the article for helpful links and resources.

Reply



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