Pipe Material Durability
Selecting pipe materials best suited for service as a storm sewer, culvert, sanitary sewer, or small bridge replacement is of primary importance to the design engineer. Most engineers are well acquainted with hydraulic and structural design criteria, but the effect of product durability on the total cost may not be clearly understood. This Buried Fact provides the reference material pertaining to pipe material durability.
Why should engineers, consultants, and public agencies be concerned with the inspection of culverts? In the past 20 years, culverts have changed significantly, new materials are being used, larger spans designed, and thinner gauge metals specified. The need and importance of culvert inspection can be summed up in one word: safety. This paper explains the FHWA Culvert Inspection Manual, rating system, and maintenance rating scale for evaluating any type of buried pipe.
This publication presents various claims made by the plastic pipe industry, discusses engineering facts which indicate the claims are not justified, and evaluates critical properties of plastic pipe which affect performance, durability and service life.
Flow In Sanitary Sewers -- The Infiltration
Control of extraneous flow in sanitary sewers is a major factor in reducing treatment costs and the amount of inadequately treated sewage discharged to receiving waters. The production of a cost-effective and satisfactorily functioning system can be achieved by utilizing adequate design criteria and assuring the best quality workmanship and materials.
The proper design of sewers and culverts requires consideration of the different, but interrelated, fields of hydrology, hydraulics, structural behavior, durability, economics and construction procedures. This Buried Fact reviews the structural behavior of flexible steel pipe and the development of design criteria and procedures.
Evaluation By Least Cost Analysis
Selecting pipe materials best suited for service as a storm sewer, culvert, sanitary sewer, or small bridge replacement is of primary importance to the design engineer. On many projects when alternate materials are bid, selection is too often based on first cost, which may not be the most economical for the design life of the project. The most economical alternate must be determined through a least cost analysis.
Design Considerations -- Concrete Pipe
and Corrugated Metal Pipe
When the various design methods and criteria developed for the different materials available for sewers and culverts are considered, policy decision procedures can become complex. Design methods must be based on theories, modified by model and full-scale testing, and most important, experience. This publication compares the hydraulic performance of smooth-wall concrete pipe versus rough-wall corrugated metal pipe.
Durability Study -- Review and Implementation
The Ohio Department of Transportation (ODOT) has published a 173-page report on corrosion and abrasion resistance of various types of pipe and pipe protection used for culverts in the State of Ohio. This article reviews the Ohio report and presents a procedure for evaluating service life and life cycle cost analysis to enable consideration of pipe durability as a design criterion.
in Sewers and Culverts
The susceptibility of various pipe materials to fires should be considered when planning storm sewer, sanitary sewer or culvert projects. This publication presents laboratory test results performed on various pipe materials in accordance with ANSI/ASTM E84, "Test Methods for Surface Burning Characteristics of Building Materials."