Bridges are more than just a way to get from place to place; they are amazing feats of engineering. From the longest bridges to the oldest bridges, sea bridges to landmark bridges, these engineering marvels have helped to shape our world. Brilliant photographs and graphic organizers, paired with exciting fun facts, will entertain and educate readers. Young engineers will learn about the science behind bridges, the obstacles of construction, and successes in bridge technology from ancient times until today.
Bridges are remarkable structures. Often vast, immense, and sometimes beautiful, they can be icons of cities. David Blockley explains how to read a bridge, how they stand up, and how engineers design them to be so strong. He examines the engineering problems posed by bridges, and considers their cultural, aesthetic, and historical importance.
Young readers will make important text-to-world connections exploring engineering concepts through the familiar structures of bridges. Simple text and informative photos engage readers as they learn about the many different kinds of bridges, their unique structures and functions, their history, and their use in the modern world. Follow-up activities will challenge students to use the mathematical and technological principles of real engineers in their own classrooms.
A “witty [and] compelling” true story for kids about San Francisco’s Golden Gate Bridge—and why it’s orange—by the New York Times–bestselling author! (Fast Company). In this delightfully original nonfiction book, National Book Award and Pulitzer Prize finalist Dave Eggers tackles one of the most famous architectural monuments in the world: the Golden Gate Bridge—and all the arguments and debates about building it and what it should look like. Cut-paper illustrations by Tucker Nichols enliven the tale, and this revised edition also includes real-life letters from local constituents making the case for keeping the bridge orange. With sly humor and lots of fascinating historical facts, this is an accessible, enjoyable read for kids (or adults), transporting readers to the glorious Golden Gate no matter where they live. “Eggers’s featherlight humor provides laughs throughout.” —Publishers Weekly (starred review). “A love letter to infrastructure.” —The New York Times “A story compelling enough to keep adults interested as they read it (and re-read it and re-read it) each night at bedtime.” —Fast Company
Timber's strength, light weight, and energy-absorbing properties furnish features desirable for bridge construction. Timber is capable of supporting short-term overloads without adverse effects. Contrary to popular belief, large wood members provide good fire resistance qualities that meet or exceed those of other materials in severe fire exposures. From an economic standpoint, wood is competitive with other materials on a first-cost basis and shows advantages when life cycle costs are compared. Timber bridges can be constructed in virtually any weather conditions, without detriment to the material. Wood is not damaged by continuous freezing and thawing and resists harmful effects of de-icing agents, which cause deterioration in other bridge materials. Timber bridges do not require special equipment for installation and can normally be constructed without highly skilled labor. They also present a natural and aesthetically pleasing appearance, particularly in natural surroundings. The misconception that wood provides a short service life has plagued timber as a construction material. Although wood is susceptible to decay or insect attack under specific conditions, it is inherently a very durable material when protected from moisture. Many covered bridges built during the 19th century have lasted over 100 years because they were protected from direct exposure to the elements. In modem applications, it is seldom practical or economical to cover bridges; however, the use of wood preservatives has extended the life of wood used in exposed bridge applications. Using modem application techniques and preservative chemicals, wood can now be effectively protected from deterioration for periods of 50 years or longer. In addition, wood treated with preservatives requires little maintenance and no painting. Another misconception about wood as a bridge material is that its use is limited to minor structures of no appreciable size. This belief is probably based on the fact that trees for commercial timber are limited in size and are normally harvested before they reach maximum size. Although tree diameter limits the size of sawn lumber, the advent of glued-laminated timber (glulam) some 40 years ago provided designers with several compensating alternatives. Glulam, which is the most widely used modem timber bridge material, is manufactured by bonding sawn lumber laminations together with waterproof structural adhesives. Thus, glulam members are virtually unlimited in depth, width, and length and can be manufactured in a wide range of shapes. Glulam provides higher design strengths than sawn lumber and provides better utilization of the available timber resource by permitting the manufacture of large wood structural elements from smaller lumber sizes. Technological advances in laminating over the past four decades have further increased the suitability and performance of wood for modern highway bridge applications.
First published in 1972, The Great Bridge is the classic account of one of the greatest engineering feats of all time. Winning acclaim for its comprehensive look at the building of the Brooklyn Bridge, this book helped cement David McCullough's reputation as America's preeminent social historian. Now, The Great Bridge is reissued as a Simon & Schuster Classic Edition with a new introduction by the author. This monumental book brings back for American readers the heroic vision of the America we once had. It is the enthralling story of one of the greatest events in our nation's history during the Age of Optimism -- a period when Americans were convinced in their hearts that all great things were possible. In the years around 1870, when the project was first undertaken, the concept of building a great bridge to span the East River between the great cities of Manhattan and Brooklyn required a vision and determination comparable to that which went into the building of the pyramids. Throughout the fourteen years of its construction, the odds against the successful completion of the bridge seemed staggering. Bodies were crushed and broken, lives lost, political empires fell, and surges of public emotion constantly threatened the project. But this is not merely the saga of an engineering miracle: it is a sweeping narrative of the social climate of the time and of the heroes and rascals who had a hand in either constructing or obstructing the great enterprise. Amid the flood of praise for the book when it was originally published, Newsday said succinctly "This is the definitive book on the event. Do not wait for a better try: there won't be any."
More than 650 landmarks are covered, ranging from ancient monuments such as Stonehenge, to contemporary engineering feats such as the World Trade Center in New York City. The concisely-written entries describe when the landmark was built, who built it, why it was built, its dimensions, how it was constructed, and any problems encountered during construction. Additional features include: numerous photographs; biographies of important builders and designers; glossary; chronology of dates in civil engineering from 3000 BC to the present; listings of tallest buildings, longest bridges, and highest dams, and a geographical index which locates the structures by country.
