Precast modular structural building method

A method of using a modular structural building system to install raised floors comprising the steps of:

• a. precasting a plurality of raised floor panels, said raised floor panels having a top and a bottom and a plurality of edges, one or more of said edges being generally angled such that the tops of the plurality of said raised floor panels have less surface area than the bottoms;
• b. precasting said plurality of raised floor panels by precasting an amount of wet concrete to a plurality of beams selected from the group consisting of wide flange steel beams, timber beams, and light gauge steel sections;
• c. transporting the precast raised floor panels to a final panel location;
• d. attaching the plurality of precast raised floor panels to at least one column such that the plurality of precast raised floor panels are suspended and stable enough for construction personnel to walk on the plurality of precast raised floor panels, said plurality of precast floor panels having a perimeter, said perimeter containing hollow ducts configured to accommodate a conventional reinforcement means selected from the group consisting of cable, rebar, prestressed concrete strand, and post-tensioned concrete strand, said conventional reinforcement means configured to provide a continuous structural diaphragm for the plurality of precast raised floor panels, said ducts configured to receive grout after receiving said conventional reinforcement means;
• e. creating a receptacle by said angled edges of adjacent raised floor panels of said plurality of raised floor panels;
• and
• f. filling the receptacle with grout;
• g. installing within the receptacle created by said angled edges of adjacent raised floor panels of said plurality of raised floor panels at least one adjustable levelling connection assembly, said adjustable levelling connection assembly configured to be capable of using torque to draw two adjacent raised floor panels level;
• and
• h. applying torque to the adjustable levelling connection assembly until the adjacent precast raised floor panels are level.