I need a 16-20' enclosed cargo trailer for my construction company. Any references for good brands, or those to stay way from?

thanks!

I've had several brands. Current is a Continental Cargo. Preference is a Cargo Craft.

I will buy another Interstate from TrailersPlus when I need a second one. I've had my 7x14 tandem since 2019 and it's been a fantastic trailer. The welded door frames and hinges are an absolute step up from most all the other brands. I load mine with a forklift at times so I have swing doors, can't speak to their ramp quality. The back sheet of plywood for the floor is getting thin and will get replaced this winter but otherwise just your normal bearings and brakes every now and again and it goes. I think mine was a "victory" model but I'm not quite sure it could have been a "patriot" but it's the step down from their top tier.

ATC trailers.

Nephew has a brand called Anvil Cargo Trailers out of Georgia. He uses it to haul his show car around. He has had it for around ten years and really likes it.
He said they have the best warranty of any. Before that he had a Diamond Cargo trailer.

I would look at a Featherlite.

https://www.fthr.com/product/utility-trailers/enclosed-cargo/