This disclosure relates generally to stormwater management and, more particularly, to a stormwater chamber with a continuous curvature. The stormwater chamber may comprise a chamber body with a chamber wall, an apex, a base, and a first and second opening. The chamber wall may include a continuous curvature from the apex of the chamber body to the first and second openings and a continuous curvature from the apex of the chamber body to the base.

There is provided a multi-sided culvert having a base section, a first side body, and a second side body. The first and second side bodies are engaged at the top of the culvert by a top engagement and supported by the base section. The base section engages the first side body by a first bottom engagement and the second side body by a second bottom engagement. The first part of the first bottom engagement has a first guide section and a first interlocking section, and the second part of the first bottom engagement has a second guide section and a second interlocking section. During installation the first and second guide sections guide the first and second interlocking sections into engagement, the first and second interlocking sections having tapered surfaces that, when engaged, permit upward and outward movement of the second part relative to the base.

A pre-stressed concrete box culvert includes a three-sided culvert top section having a pre-stressed top slab, a first sidewall and a second sidewall. The first and the second sidewalls extend orthogonally from opposite ends of the pre-stressed top slab, and the first and the second sidewalls each include a free end that has at least one male or female connector. The pre-stressed concrete box culvert includes a three-sided culvert bottom section having a pre-stressed bottom slab and a third sidewall and a fourth sidewall. The third and the fourth sidewalls extend orthogonally from opposite ends of the pre-stressed bottom slab, and the third and the fourth sidewalls each include a free end that has at least one male or female connector to mate with the at least one corresponding male or female connector arranged at one of the respective free ends of the first and the second sidewalls.

A method of making a molded plastic arch shape cross section stormwater chamber having a corrugated wall comprises molding half chambers which are connected by hinges at a joint at the top of the chamber. The chambers may be compactly stored and transported in splayed out configuration. Later, upward force is applied to the hinge joint location of each chamber, so the half chambers are rotated by force of gravity, whereby a faying surface on each half chamber is urged toward the like surface of the other half chamber. The faying surfaces are then fused to each other, preferably as a result of prior heating or by melting of a fusion weld element that is captured in the space between the faying surfaces.

A method of making a molded plastic arch shape cross section stormwater chamber having a corrugated wall comprises molding half chambers which are connected by hinges at a joint at the top of the chamber. The chambers may be compactly stored and transported in splayed out configuration. Later, upward force is applied to the hinge joint location of each chamber, so the half chambers are rotated by force of gravity, whereby a faying surface on each half chamber is urged toward the like surface of the other half chamber. The faying surfaces are then fused to each other, preferably as a result of prior heating or by melting of a fusion weld element that is captured in the space between the faying surfaces.

Structural cells and matrices using the structural cells for positioning below a hardscape that define a void space therein, the structural cells, matrices using the cells and methods of assembly allowing in one embodiment the introduction of a structural fluid such as concrete to provide an alternative structural cell and matrix product. In one embodiment a structural cell assembly is described comprising a structural cell with a plurality of legs integrally linked to a frame at a first frame end, the frame linking the legs together and the frame defining a generally flat plane with the legs extending substantially orthogonally away from the first frame end about the frame flat plane to a leg terminal end; and a separate plate engaging the legs, the separate plate comprising linked sockets, each socket engaging the leg terminal end; and/or linked sockets, each socket engaging the leg frame ends or a part thereof.

A pavement drain has a perimeter formed by sidewalls, and a drain aperture at the center of the perimeter. A drain surface is provided between form a path from the sidewalls to the drain aperture. A circular protrusion is concentric with the drain aperture and extends downwards from drain surface to engage with a drain pipe.

A pavement drain has a perimeter formed by sidewalls, and a drain aperture at the center of the perimeter. A drain surface is provided between form a path from the sidewalls to the drain aperture. A circular protrusion is concentric with the drain aperture and extends downwards from drain surface to engage with a drain pipe.

A storm water management system and methods of assembling the same are provided. The system has open columns having corbels that support a slab spanning between adjacent columns. The system is assembled by positioning a first plurality of slabs end-to-end and spaced apart from a second plurality of slabs. The column is seated into an opening formed between the first and second plurality of slabs. A first corbel extends from a first side of the column and over laps an edge portion of a slab of the first plurality. A second corbel extends from a second side of the column and over laps an edge portion of a slab of the second plurality.

A storm water management system and methods of assembling the same are provided. The system has open columns having corbels that support a slab spanning between adjacent columns. The system is assembled by positioning a first plurality of slabs end-to-end and spaced apart from a second plurality of slabs. The column is seated into an opening formed between the first and second plurality of slabs. A first corbel extends from a first side of the column and over laps an edge portion of a slab of the first plurality. A second corbel extends from a second side of the column and over laps an edge portion of a slab of the second plurality.