When designing cultivation facilities or other business types, the design process typically starts with first choosing a property, then choosing a building, and then designing the equipment and systems to outfit the building. When it comes to hemp extraction, we actually recommend the opposite: start with choosing your processing method, then design your facility and systems, and finally choose a property that will work for the building you have designed.
Hemp extraction typically involves the use of hazardous materials, which can affect a number of building and property codes and regulations. In addition, the type and quantity of hazardous materials can make a big difference in facility design and considerations, such as where materials will be located. If you choose your building and/or property before you’ve defined which extraction method you’ll be using, you may find yourself in a position where the building and/or property you’ve purchased or leased won’t actually work for your facility – which is a major setback for both your schedule and your budget.
As discussed in Step One of this series, hemp extraction facility design depends greatly on your chosen extraction method and your desired throughput. Before you deep dive into the facility design process, you should already have chosen your UL-listed or third-party peer reviewed extraction equipment, and have an understanding of what you want your system(s) to look like. Another important consideration that should be addressed early on in the facility design process is the space needed for your equipment.
Equipment Space Needs
While Step One involves choosing your desired throughput and subsequently, equipment, Step Two involves placing these systems in your facility and designing the rest of the spaces around these systems. Many pieces of equipment involved in an extraction system have space requirements that will greatly impact the design of your entire facility, and can be extremely costly and time-consuming to remedy after the fact. In our experience, most extraction facility design projects that do not bring on an engineering and architecture team early enough in the process risk space mismanagement issues.
As an example, a dedicated electrical room or area removed from the extraction process is typically required to store the multiple electrical panels, transformers, transfer switches, lighting control panels and other building service equipment. Space for large heating, cooling and ventilation (HVAC) equipment is another common area business owners may neglect to consider. Bringing on an experienced mechanical, electrical and plumbing (MEP) engineering team early on in the process will help you avoid making costly mistakes.
Classified Spaces
Classified spaces are another important safety concern that should be addressed early on in the facility design process. Certain factors involved in the extraction process can lead to different spaces throughout your facility falling into different code classifications. The two areas we typically run into classified space issues deal with flammable gases, vapors or liquids and dust and fiber.
Open vs. Closed Systems: Which do you have?
Determining whether or not your systems are open or closed will have a great impact on the facility design process, especially when it comes to your hazardous occupancy classification. Generally speaking, open systems are far more dangerous than closed systems and will trigger a hazardous occupancy classification far sooner in the process. A closed system is defined as the use of a hazardous material involving a closed vessel or a system that remains closed during normal operations (vapors are not liberated outside of the vessel or system). An example of a closed system would be product conveyed through a piping system into a closed vessel or other piece of equipment. An open system is defined as the use of a hazardous material involving a vessel or system that is continuously open to the atmosphere during normal operations where vapors are liberated, or the product is exposed to the atmosphere. Examples of open systems include dispensing from or into open beakers or containers, dip tank and plating tank operations.
There are many factors that go into hazardous occupancy classification, and because code officials may interpret definitions differently, the process can be difficult to navigate. One of the common areas in which we see clients struggle is when a piece of extraction equipment (ie. the extractor) may be a closed process, but that does not necessarily mean that the entire system is a closed system. Equipment manufacturers are not always explicit in their verbiage, so don’t just take their word for it. An experienced design team can help you navigate the process and avoid common complications and nuances.
Other Considerations
Because the facility design process is the most complex stage of starting a hemp extraction facility, we’ve broken this step into two parts. Step Two, Part Two of this series will more deeply explore hazardous occupancy classification, which involves your entire design and engineering team and will set us up for the final step in the process, choosing a property.
InCase You Missed It
Getting Started in Hemp Extraction: Step One: Choose Processing Method
Laura Breit is the founder and owner of Oregon-based firms Root Engineers and ColeBreit Engineering. She is a professional mechanical engineer specializing in the design of HVAC, plumbing, and process systems for the cannabis industry. Using her experience in traditional engineering methods through Root Engineers parent company, ColeBreit Engineering, she applies her team’s depth of knowledge to create efficient and economically sound solutions for cultivation and processing facilities. Taking a custom approach to each project, Laura has experience working in the traditional design-bid-build method, as well as in the design-build arena. She enjoys the dynamic nature of the cannabis industry, and since legalization in her home state of Oregon in 2014, Laura has led her team of mechanical and electrical engineers on more than 80 cannabis-related projects across the country. She thrives on building relationships with building owners, growers, architects, contractors and investors.
Your email address will not be published. Required fields are marked *
Name *
Email *
Website
Save my name, email, and website in this browser for the next time I comment.
Comment *
Notify me of follow-up comments by email.
Notify me of new posts by email.
Δ
Big Island Grown (BIG) is a vertically integrated cannabis company based in Kailua-Kona, Hawaii County, on the Big Island of Hawaii, whose reach now extends to several islands in the…
There are three primary ways that brands can use social media platforms for marketing: organic posts, shared posts, and paid posts. With paid posts still off limits to most businesses…
By Aaron Pelley, Attorney at Harris Sliwoski Despite continuously surpassing every other state with recreational cannabis in terms of total retail sales, California’s cannabis industry has faced continuous and far-reaching…
The difference between medicinal and recreational marijuana has always been arbitrary. For example, after legalizing recreational cannabis, California initially required each cultivated seedling to be designated by growers as either…