This is a sector I'm making a concerted effort get into with regards to lending. Now that entities can use the SBA 504 loan for purchases and refinancing industrial properties are a good fit for this loan.
Historically, industrial properties have fallen into two categories, light and heavy,
Light industrial buildings typically have one important leg up on their heavy industrial counterparts, and that is fewer environmental issues. Lenders try to avoid environmental issues for a lot of reasons: less liability, increased marketability, costs associated with cleanups, etc.
LI properties also tend to be more palatable to lenders when it comes to financing since they usually encompass business types a lender can understand. From an ownership perspective, I suspect that also makes them a safer bet. I would rather own a facility where the tenant makes clothing and can market their product to many buyers. That should make them less vulnerable to market changes compared to a company who say makes heavy brake pads. How many buyers can there possibly be for that product?
Heavy industrial buildings don't necessarily have to manufacture tanks or heavy machinery to be considered HI. I believe any business that uses chemicals, metals, gases, etc. could be considered HI. Hypothetically, that could make a company who manufacture parts for a cell phone company a HI business. At first glance, you might not consider a company such as that as HI, but since toxic chemicals are used in the manufacturing process, it would be.
The obvious downside to a HI business/property are the environmental concerns. Another issue that could be considered a downside is if the property is so well-suited to HI that it really can't be anything else without massive capital expenditure to convert it. This is obviously something to consider when looking at a property. Is the property HI because of the past tenants or is it because it has heavy lift machinery, smelting equipment, etc. on site?
There is another type of industrial property that is having success as of late, and that is industrial flex space. This type of property can easily be converted to suit many needs, which makes financing them easier and also makes them more attractive to a wider variety of tenants.
This type of building often has an office space component in addition to space for manufacturing. This allows a business to house their operations and manufacturing under one roof. It also typically allows for the conversion from warehouse to manufacturing fairly easy which further increases the versatility of the property.