AASHTO M 294-18 PDF Download

AASHTO M 294-18 is a standard specification that provides guidelines for the use of corrugated polyethylene (PE) pipe, couplings, and fittings in drainage applications. The standard covers nominal sizes ranging from 300 to 1500 mm (12 to 60 inches) in diameter.

The specification outlines various requirements for materials, workmanship, dimensions, and pipe stiffness. It also includes testing methods to determine the environmental stress crack resistance and brittleness of the corrugated polyethylene pipe. The standard also addresses the joining systems and the form of markings on the pipe.

Corrugated polyethylene pipe is designed for use in surface and subsurface drainage applications where the soil provides support to the flexible walls of the pipe. It is commonly used for collecting or conveying drainage water through open gravity flow, such as in culverts and storm drains.

Note: It is important to protect the exposed ends of the polyethylene pipe from prolonged exposure to ultraviolet radiation and the effects of combustibility.

It's worth mentioning that the specification does not include requirements for bedding, backfill, or earth cover load. The proper performance of corrugated polyethylene pipe depends on the appropriate selection of bedding and backfill materials, as well as proper installation techniques. The structural design and installation procedures can be found in AASHTO's LRFD Bridge Design Specifications, Section 12, and LRFD Bridge Construction Specifications, Section 30, respectively. If required, the manufacturer should provide detailed profile wall section information for an engineering evaluation upon the user's or engineer's request.