Eric_Phillips
Platinum Member
I put recessed rings in my floor, bolted through the frame cross members. I used a router to cut a recess in the decking.
https://www.amazon.com/Tie-Down-Anchors-Recessed-Fitting-Cargo/dp/B01GGN8A6K/ref=sr_1_7?hvadid=78271536339315&hvbmt=be&hvdev=c&hvqmt=e&keywords=recessed+tie+down+rings&qid=1564486354&s=gateway&sr=8-7
The previous owner of my trailer installed these. I didn't trust screws holding them down. Didn't matter since within a couple years they were so rusted you couldn't pull the rings up.