Compatible with all of our steel stairs, this platform design can best be described in a single word as flexible. Ideal for commercial egress stair applications, but just as well suited for the industrial stair and steel alternating tread stair. Without the size limitations of the single formed platforms, this is the model our designers go to when designing many of the more complicated stair systems and is the only platform that will work with our Model 03AA and 04AA stair models.