These stairs span over three floors and each level is cantilevered on two central spine beams; lack of risers and see-thru glass landings allow for plenty of natural light to travel throughout the open stairwell and into the adjacent open areas; 3 1/2" white oak treads and stringers were manufactured by our craftsmen under strict quality control standards, and were delivered and installed by our experienced technicians. CSC 1976-2020 © Century Stair Company LLC ® All Rights Reserved.