Tolerable movement criteria for highway bridges, volume I : interim report.

This investigation included (a) the collection of field data on bridge movements, structural damage, and tolerance to movements for a large number of bridges in the United States and Canada; (b) a series of analytical studies to evaluate the effect of different magnitudes and rates of differential movement on the potential level of distress produced in a wide variety of bridge structures of different span lengths and stiffnesses; and (c) the development of a methodology for the design of bridges that embodies a rational set of criteria for tolerable movement of steel bridges based on strength and serviceability. This volume is an interim report on the entire study. (FHWA)