Patent ID: 8523486
Filing Date: 2013-09-03
Classification: B28B,E01F

Abstract:
1. A concrete culvert assembly for installation in the ground, comprising a set of spaced apart elongated footers, a plurality of precast concrete culvert sections supported by said footers in side by side alignment, each of said concrete culvert sections having: an open bottom, a top wall and spaced apart side walls to define a passage thereunder, each of said side walls extending downward and outward from the top wall, each of said side walls having a substantially planar inner surface and a substantially planar outer surface, the top wall having an arch-shaped inner surface and an arch-shaped outer surface and a substantially uniform thickness, first and second haunch sections, each haunch section joining one of the side walls to the top wall, each haunch section defining a corner thickness greater than the thickness of the top wall, for each side wall an interior side wall angle is defined by intersection of a first plane in which the inner surface of the side wall lies and a second plane that is perpendicular to a radius that defines at least part of the arch-shaped inner surface of the top wall at a first point along the arch-shaped inner surface of the top wall, an exterior side wall angle is defined by intersection of a third plane in which the outer surface of the side wall lies and a fourth plane that is perpendicular to a radius that defines at least part of the arch-shaped outer surface of the top wall at a second point along the arch-shaped outer surface, the third plane being non-parallel to the first plane, the interior side wall angle being at least one-hundred and thirty degrees, the exterior side wall angle being at least one-hundred and thirty-five degrees, the exterior side wall angle being different than the interior side wall angle, and each side wall being tapered from top to bottom such that a thickness of each side wall decreases when moving from the top of each side wall to the bottom of each side wall.