This is a very sturdy bed, I already had 2 mattresss that were 11 inches thick and longer than the frame. I took the upper bed rails to a weld shop and added 6 1/2 inches, then added 5 1/2 inches to the head and foot, I have hardwood floors and replaced the wheels with 2inch bun feet on the lower bed frame. Nothing shakes, rattles or bounces when someone gets on the bed. We love it.
Trundle bed Hack.
This is a very sturdy bed, I already had 2 mattresss that were 11 inches thick and longer than the frame. I took the upper bed rails to a weld shop and added 6 1/2 inches, then added 5 1/2 inches to the head and foot, I have hardwood floors and replaced the wheels with 2inch bun feet on the lower bed frame. Nothing shakes, rattles or bounces when someone gets on the bed. We love it.