Abstract: A corrugated metal open top pipe drain for the collection and removal of surface water from paved areas, such as highways, parking lots, airports and the like.

Abstract: A method is disclosed for the construction of structures for tunnels, culverts, and pressure pipes of any size and shape, straight or curved, constant or variable cross section. The method requires very little formwork, with all work done on site. The method discloses the casting of a lower half of the structure as a continuous element, and the method of utilizing this half as a form in which modular lengths of the upper half of the structure are cast, lifted, inverted, and lowered to form the complete structure. Various methods are disclosed for joining the modules comprising the upper half of the structure to provide various degrees of structural continuity and fluid tightness.

Abstract: A device for limiting stresses exerted by neighbouring ground on a buried structure which comprises at least two neighbouring elements which form at least one part of the wall of the structure. The stress limiting device comprises at least one longitudinal slidable plate adapted to be connected by one of its edge portions to one of the neighbouring structure elements, at least two longitudinal guide elements adapted to be connected to the other structure element and applied respectively by one of their faces against at least the opposed edge portion of the slidable plate. A plurality of fixing means extend through apertures in the slidable plate and in the guide elements for clamping the opposed edge portion of the slidable plate between said guide elements. At least one of the guide elements constitutes a fishplate.

Abstract: Corrugated steel plate is formed from a flat plate stock and has a length of at least about 12 feet, a corrugation pitch of at least about 12 inches, and a corrugation depth of at least four inches. The plate has thicknesses of up to 1/2 inch and more. Also disclosed are structures such as tunnel-type, heavy load-supporting structures defined by upright and horizontal structure portions which extend over no more than about 180.degree. while being capable of supporting up to 40 feet of ground fill and payload thereon. The corrugated plate can be used singly or as double, spaced-apart plate assemblies which are hollow or filled with concrete or a like material, including steel reinforcing bars for the concrete. The corrugated plate can also be formed into vertical, sectional retaining walls, bin type retaining walls, bridge abuttment walls, flat support surfaces such as bridge decking, open air structures, guard rails, sheet piling, etc.