EZ-ACCESS FORTRESS 27.5 in to 42.5 in H OSHA Compliant Aluminum 4-Riser Stair System with PlatformEZ ACCESS FORTRESS Aluminum Stair System The EZ ACCESS FORTRESS Aluminum Stair System offers OSHA compliant access with adjustable height from 27. 5 to 42. 5 inches. This robust, all aluminum stair system features durable, corrosion resistant materials designed to withstand harsh environments and high traffic, ensuring safe and reliable accessibility over time. Key Features: Durability: Crafted from aircraft quality aluminum, resistant to corrosion