Abstract: A platform structure adapted for rapid assembly and a method of assembling the platform structure. A plurality of prefabricated column assemblies are removably anchored on a platform foundation, and prefabricated landing assembly means are removably mounted with the column assemblies to form a landing above the platform foundation. Subsequently, a stair assembly is removably mounted between the landing assembly means and the platform foundation to provide a passageway permitting ingress and egress to the landing.