AASHTO M 190-04 (2017) PDF Download

The AASHTO M 190-04 (2017) standard specifies the requirements for bituminous-coated corrugated metal culvert pipe and pipe arches. The standard categorizes these culverts into four types based on their coatings and pavement: Type A, Type B, Type C, and Type D.

Type A culverts are fully bituminous-coated, meaning the entire pipe is coated with bitumen. Type B culverts are half bituminous-coated with a paved invert, which means only half of the pipe is coated with bitumen, and the invert is paved. Type C culverts are fully bituminous-coated and have a paved invert.

Lastly, Type D culverts are fully bituminous-coated and either 100 percent paved or lined. This means that the entire pipe is coated with bitumen, and the interior of the pipe is either fully paved or lined.

The standard outlines the specifications for the materials, dimensions, coatings, and pavement for each type of culvert. It also provides guidance on installation, inspection, and testing procedures to ensure the quality and durability of the culverts.