Model # 72S

This stair uses a 7 line system with less than 4" spacing. The diameter is 72" with a 30 degree tread run. Although not shown in this picture, this stairway has three levels with two 90 degree landings on the second and third level with guard rail to match. The treads are a custom arc pattern made out of a heavy duty 3/16" thick carbon steel. The top rail is a 1 1/2" round tubing with the other intimidate rails were made from 3/4" solid round bar. The posts, at every quarter turn, are made from 1/2" x 2" solid flat bar. The center column is made out of a heavy duty 6" ID schedule-40 pipe. The stair finish is a hot dip galvanize coating.