Corrugated stormwater chamber having sub-corrugations

摘要

A plastic arch-shape cross section corrugated stormwater chamber has a multiplicity of crest corrugations and valley corrugations which run transverse to its length. Sub-corrugations run along part or all of the arch-curve lengths of either crest corrugations or valley corrugations, or along both of them. A sub-corrugations are smaller in dimension than an associated crest corrugation or valley corrugation. Sub-corrugations may taper in width and depth and may taper to nothingness. A compound convex shape end cap, useful for closing off the ends of stormwater chambers, has substantially vertical corrugations with analogous sub-corrugations.

主权项

1. A chamber for drainage, comprising:
opposing side bases; sidewalls extending from the opposing side bases; a plurality of crest corrugations and a plurality of valley corrugations positioned along a length of the chamber; and at least one crest sub-corrugation extending upwardly from an opposing side base and along a portion of a crest corrugation, wherein the at least one crest sub-corrugation extends upwardly about one-quarter to two-thirds of a height of the chamber.