Building system using modular precast concrete components

Abstract

A building system with modular precast concrete components uses bulb tee beams to span between walls that are distributed within the building footprint to open up the structure. Shallow corrugated slabs span between the bulb tee beams to form the floor deck. Optionally, double tee beams can be used at the periphery of the structure for longer spans.

I claim: 
     
         1 . A building system comprising a plurality of precast concrete components to create a structure including:
 a plurality of walls spaced apart from one another in a predetermined pattern;   a plurality of bulb tee beams spanning between and supported by the walls, said bulb tee beams having an upper flange; and   a plurality of shallow corrugated slabs spanning between and supported by the upper flanges of the bulb tee beams to provide a floor surface.   
     
     
         2 . The building system of  claim 1  wherein corrugated slabs have ends, and further comprising keyways connecting the ends of adjacent corrugated slabs. 
     
     
         3 . The building system of  claim 1  further comprising double tee beams supported by the bulb tee beams at the periphery of the structure. 
     
     
         4 . The building system of  claim 3  wherein the double tee beams are supported between the bulb tee beams and spandrels in the peripheral walls. 
     
     
         5 . The building system of  claim 1  wherein the walls are oriented to resist lateral loads transmitted by the bulb tee beams along the length of walls. 
     
     
         6 . The building system of  claim 1  wherein the corrugated slabs are perpendicular to the bulb tee beams. 
     
     
         7 . The building system of  claim 1  further comprising a concrete topping layer on the corrugated slabs. 
     
     
         8 . The building system of  claim 1  wherein the bulb tee beams bear on corbels on the walls.