Steven S Michels

US Patent:

20090183321, Jul 23, 2009

Filed:

Jan 22, 2008

Appl. No.:

12/009730

Inventors:

Glennon J. Boresi - Union MO, US
Steven Michels - Libertyville IL, US

International Classification:

E01D 6/00
E02D 27/32
E01F 5/00
E01D 19/00

US Classification:

14 4, 52294, 405125

Abstract:

A concrete building system includes a set of parallel spaced apart strip footers and one or more precast concrete sections supported by the footers in a predetermined alignment. Each precast concrete section has a top slab integrally connected to a pair of equally flared legs. Each leg depends from an end of the top slab at an effective flare angle to form a corner. The precast section includes haunch sections formed between the top slab and each leg resulting in a corner thickness greater than the uniform thickness of the angled leg to which it is integrally formed and the top member. The length of the effective span of each section varies between 60 and 90 percent of the distance between the bottom-of-leg span. The sections can be used to construct bridges, culverts, underground storage units, fluid detention units and dam structures.