When our treads were tested by NTA (a local testing agency), it took over 2,000 lbs to pull just one single treads off its bracket, and it took over 3,000 lbs to do any actual damage to the treads themselves. According to international building code requirements, each stair step must be able to bear at least 300 lbs of concentrated weight. Floating stairs are no exception, and thankfully, our floating stair treads soar above and beyond that amount.