Title Page, Copyright

pdf iconDownload PDF
 

Contents

pdf iconDownload PDF
 

read more

Preface

pdf iconDownload PDF

pp. xi-xviii

This book is intended as a testament to the aesthetic and engineering achievements found in the bridges of New Jersey. It is also a personal commentary on this most original, misunderstood, and occasionally peculiar of states. New Jersey is a breathing paradox. Nicknamed the Garden State for its agrarian roots, it is also one of the most densely populated and industrialized of states. Although often mocked and stereotyped in popular American culture, ...

read more

Introduction

pdf iconDownload PDF

pp. 1-22

THE ALLURE OF THE BRIDGE
Each of us has an individual experience and reaction to bridges. There is the immediate pride in the human achievement of erecting something tangible, lasting, and beneficial to humanity. On further reflection, we also recognize that a bridge has positive connotations when used as a metaphor for linking two places, ideas, per- sons, groups, and so forth. ...

read more

Arch Bridges

pdf iconDownload PDF

pp. 23-54

The simplest and most primitive bridge is undoubtedly a plank or tree laid across a stream, supported by the land at each end and perhaps by a series of rocks placed in the stream. However, there are problems with beam bridges. Unless they are supported regularly, their reach is limited; ...

read more

Truss Bridges

pdf iconDownload PDF

pp. 56-90

Trusses are used to stiffen and support a bridge, and do so by distributing the loads and forces that act upon the bridge in accordance with the positioning of the members. In other words, vertical, horizontal, and diagonal “members” absorb the tensile and compressive forces. When a truss component is placed in “tension,” ...

read more

Covered Bridges

pdf iconDownload PDF

pp. 91-93

Sometimes called “kissing bridges,” because of their concealing features, covered bridges often have romantic connotations. However, the primary purpose of a cover over the deck and trusses of a wooden bridge was to shield them from snow and rain, and therefore decay and rot. Eric Sloan, in his classic American Barns and Covered Bridges, ...

read more

Cantilever Bridges

pdf iconDownload PDF

pp. 94-109

The cantilever bridge was a popular type in New Jersey in the first half of the twentieth century. In cantilever construction, the bridge can be built from both sides of the crossing simultaneously, either meeting or having a final center span put into place to link the two extended “diving board” spans. ...

read more

Suspension Bridges

pdf iconDownload PDF

pp. 110-127

In the prototypical suspension bridge, the deck is suspended by cables made of rope, steel, or some other material, which themselves are draped over towers and anchored at either end of the crossing. Modern suspension bridges have the anchored cables carried over large supporting towers, with a separate set of cables or wires holding up the deck below. Because it does not need intermediate piers to support the deck, ...

read more

Movable Bridges

pdf iconDownload PDF

pp. 128-146

Movable bridges, as the name implies, change position in whole or in part to allow traffic to pass below or around them. The concept is not new. As early as the sixteenth century, Leonardo da Vinci designed a “very light yet rugged” movable bridge for military purposes. The basic types are the bascule, swing, and lift bridges. ...

read more

Girder Bridges

pdf iconDownload PDF

pp. 147-152

From approximately 1915 through 1955, the most common type of highway bridge built throughout much of the United States was the steel girder bridge. The girder is a form of beam bridge in which the deck slab is supported by certain types of beams or girders. Wooden timbers were shaped into girders until iron, steel, and reinforced concrete came along. ...

read more

Concluding Words

pdf iconDownload PDF

pp. 153-154

More than any other public structure, the bridge is transparent. In the case of most bridges, one can walk or ride over them. Others—railroad freight bridges, for example—can only be viewed. Unlike buildings, whose interiors are often inaccessible except to those who work or conduct business in them, bridges may be observed in their entirety. ...

Bibliography

pdf iconDownload PDF

pp. 155-168

Index

pdf iconDownload PDF

pp. 169-178

About The Author

pdf iconDownload PDF

pp. 179-179