Method of making surface drainage culvert

Abstract

Abstract A surface drainage culvert of the type comprising a pipe section which is cut longitudinally forming an aperture along the upper surface of the pipe and which has an upstanding grate assembly lodged within the aperture. The aperture consists of a series of longitudinally spaced slots in the pipe with unslotted pipe portions separating each slot. The grate assembly consists of a pair of spaced, parallel sidewalls which form an inlet drainage passage to accept drainage water inflow at the top of the passage and discharge the water at the bottom of the passage through the aperture into the pipe. Lateral stiffeners maintain the spacing of the top of the drainage passage, while a spacer means, situated within a guide formed in the grate assembly sidewalls, maintains the spacing of the sidewalls at the bottom of the drainage passage. In one form of the invention, the stiffeners are an integral part of the grate between the sidewalls, while in another form of the invention, the stifferers are an integral part of a top plate which is attached to the sidewalls. The drainage culvert is constructed by slotting of the pipe, fabricating the grate assembly, inserting the grate within the slots in the pipe, and then inserting the spacer means in the grate assembly to maintain the spacing of the sidewalls and lock the grate assembly within the pipe. This is a division, of application Ser. No. 284,065, filed July 16, 1981, now U.S. Pat. No. 4,365,911, issued Dec. 28, 1982 which in turn is a continuation-in-part application Ser. No. 168,309 filed 7-10-80 and now abandoned.

Inventors

• 👤 Shelton R. Rossberg

Bibliographic Details