Two new publications offer guidelines for working with steel infrastructure.
Design of Concrete Structures Using High-Strength Steel Reinforcement, from the National Cooperative Highway Research Program, evaluates AASHTO specifications for using reinforcing steel in bridges. The report recommends language for permitting high-strength reinforcing steel with specified yield strengths not greater than 100,000 psi (100 ksi).
The Structural Steel Designer's Handbook, fifth edition, is based on the most recent design codes, material and design standards, and specifications for designing with structural steel. It covers basic properties of structural steel, fundamentals of fabrication and erection, and design details of various steel members (beams, columns, tension components) and connections. It presents structural design methods and criteria for several different types of bridges.