Building system and precast module for use therein

Claim 1

A prefabricated construction module for use in a building structure, said module comprising a horizontal rectangular slab section having opposed surfaces and at least two spaced apart transverse wall sections secured to said horizontal slab section and extending a predetermined distance above each said opposed surfaces to a height of substantially half a complete wall height where there is no bending moment, said wall sections constituting a load sup-porting projection when said module is juxtaposed with other modules in said building structure and said horizontal slab constituting a floor and ceiling surface by said opposed surfaces, respectively, for adjacent room sections, said wall sections having an end connecting edge for connection to a juxtaposed end connecting edge of a wall section of another module, and an extension support notch protruding beyond at least opposed ones of said wall sections extending in a direc-tion parallel to the horizontal plane of said horizontal slab in an area of no bending moment to an end connecting edge situated to provide additional support outside the module for supporting flat panel members between adjacent modules for the construction of a building structure having strength properties comparable to a fully monolithic structure, said extension support notch being a projection of said horizontal slab.