A New Innovation in concrete stair form-work. A light weight alternative to traditional stair form systems. Simply clip the steps together to form a flight of stairs. Its that easy! No crane or hoist required! The Original Modular Stair Form™ system is versatile in providing two installation methods. The first method allows you to install the stairs after the upper and lower landings have been poured when using our innovative Void Former Kit. The second method allows you to install the stairs when you pour the upper landing. This additionally provides site access to the upper level before the concrete is placed. Naturally, propping of the stair flight is required before pouring concrete as per any typical stair form installation.