How Much Do Stairs Weigh

Steel and aluminum standard metal spiral staircase kits range in diameters from 40″ to 72″; tread sizes from 18″ to 34″; and landing sizes from 21″ to 37″. Steel standard metal spiral stair kits weigh from 270 pounds to 360 pounds, and aluminum metal spiral staircase kits weigh from 135 pounds to 190 pounds.

How do you support a spiral staircase?

The primary support for a spiral staircase is a pole in the center around which the stair treads spiral. The pole is anchored at the bottom via a bracket bolted to the floor; the top of the pole is free-standing. The stair treads are attached to the pole at their inner edges.

How much weight can a spiral staircase hold?

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.