TABLE OF CONTENTS The 20th Century Steel Frames - Skyscraper Framing - Welded, Rigid and Arch Framing - New Structural Forms and Materials The Metropolitan Railway Terminal - Stations with Separate Trainsheds - The New York Stations Steel Truss and Girder Bridges - Simple and Continuous - Cantilever Trusses Steel Arch Bridges Suspension Bridges Concrete Building Construction - Column-and-Beam and Rib Framing - Slab Construction - Shells and Prestressed Forms Concrete Bridges - Arch Bridges - Girder, Slab and Rigid-Frame Bridges Concrete Dams and Waterway Control - Early Systems - Forms of Dams - Bureau of Reclamation - The TVA The Metropolitan Parkway An Architectural Appraisal