A total of 2 reviews of this product on Reddit.
31st Jul 2017
I once slept in this as bunkbeds: https://www.amazon.com/Blantex-Non-Adjustable-Military-Bunkable/dp/B004YDFTNC
The frame is VERY solid, but the mattress support is springs that squeak. But I guess you could remove those and put in wood slats.
2nd Feb 2017
I found a couple frames I liked, but were not available in the size I was looking for –