Abstract
This report contains the findings of research performed to develop a recommended load and resistance factor design (LRFD) specification for thermoplastic pipe used in culverts and drainage systems for highway structures. The report details the research performed and includes a recommended LRFD design specification, a quality assurance specification for manufactured thermoplastic pipe, and the results of supporting analyses. Thus, the report will be of immediate interest to bridge and structural design engineers and materials engineers in state highway agencies, as well as to thermoplastic pipe suppliers. (Author/publisher)