LR-1010, Sections A1,A2, Mid-County Expressway Proposed Construction, Delaware County PDF Download
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 84
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 84
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Book Description
Author: Michael A. Ritter
Publisher:
ISBN: 9781410221919
Category : Technology & Engineering
Languages : en
Pages : 500
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Book Description
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.
Author:
Publisher:
ISBN:
Category : Automobiles
Languages : en
Pages : 176
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Book Description
Author: Wai-Fah Chen
Publisher: CRC Press
ISBN: 1000005925
Category : Technology & Engineering
Languages : en
Pages : 690
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Book Description
First Published in 1999: The Bridge Engineering Handbook is a unique, comprehensive, and state-of-the-art reference work and resource book covering the major areas of bridge engineering with the theme "bridge to the 21st century."
Author: Roger Brockenbrough
Publisher: McGraw Hill Professional
ISBN: 0071428887
Category : Technology & Engineering
Languages : en
Pages : 973
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Book Description
* Compiles all the data necessary for efficient and cost-effective highway design, building, rehabilitation, and maintenance * Includes metric units and the latest AASHTO (American Association of State Highway Transportation Officials) design codes
Author: United States. Interagency Advisory Committee on Water Data
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 80
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Book Description
Author: Institute of Medicine
Publisher: National Academies Press
ISBN: 0309159687
Category : Education
Languages : en
Pages : 229
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Book Description
In order for the United States to maintain the global leadership and competitiveness in science and technology that are critical to achieving national goals, we must invest in research, encourage innovation, and grow a strong and talented science and technology workforce. Expanding Underrepresented Minority Participation explores the role of diversity in the science, technology, engineering and mathematics (STEM) workforce and its value in keeping America innovative and competitive. According to the book, the U.S. labor market is projected to grow faster in science and engineering than in any other sector in the coming years, making minority participation in STEM education at all levels a national priority. Expanding Underrepresented Minority Participation analyzes the rate of change and the challenges the nation currently faces in developing a strong and diverse workforce. Although minorities are the fastest growing segment of the population, they are underrepresented in the fields of science and engineering. Historically, there has been a strong connection between increasing educational attainment in the United States and the growth in and global leadership of the economy. Expanding Underrepresented Minority Participation suggests that the federal government, industry, and post-secondary institutions work collaboratively with K-12 schools and school systems to increase minority access to and demand for post-secondary STEM education and technical training. The book also identifies best practices and offers a comprehensive road map for increasing involvement of underrepresented minorities and improving the quality of their education. It offers recommendations that focus on academic and social support, institutional roles, teacher preparation, affordability and program development.
Author: P. E. Potter
Publisher: Springer Science & Business Media
ISBN: 3642618871
Category : Science
Languages : en
Pages : 473
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Book Description
The study of paleocurrents, since 1963, is now a very routine part of sedimentology, and more and more such studies are finding use in other fields. Thus it seemed appropriate for us to review post-1963 developments and present them in a compact manner for the interested reader. Instead of rewriting a second edition, which thirteen years later we would organize in a completely dif ferent way, we have brought each chapter up to date with new material up to 1976. A new update supplement has in this edition been inserted after each one of the original chapters. We have stayed close to the original theme of paleocurrents-how to measure them and how to use them to solve geological problems ranging in scale from the hand specimen to the sedimentary basin and beyond. We have used many annotated references and tables to help pre sent this information to the reader. The reader will note that we have cited a few 1962 references - pUblications that appeared too late to be cited in the original 1963 edition. A few times we have also cited a reference which was included in the first edition. These are marked with an asterisk and hence do not appear in the new lists of references. We have been aided by many. In Cincinnati, WANDA OSBORNE and JEAN CARROL did typing and RICHARD SPOHN, the University's geological librarian, was very helpful in obtaining many references to the literature.
Author: Raymond Panko
Publisher: Prentice Hall
ISBN: 9780133544015
Category : Business
Languages : en
Pages : 0
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Book Description
For undergraduate and graduate courses in Business Data Communication / Networking (MIS) With its clear writing style, job-ready detail, and focus on the technologies used in today's marketplace, Business Data Networks and Security guides readers through the details of networking, while helping them train for the workplace. It starts with the basics of security and network design and management; goes beyond the basic topology and switch operation covering topics like VLANs, link aggregation, switch purchasing considerations, and more; and covers the latest in networking techniques, wireless networking, with an emphasis on security. With this text as a guide, readers learn the basic, introductory topics as a firm foundation; get sound training for the marketplace; see the latest advances in wireless networking; and learn the importance and ins and outs of security. Teaching and Learning Experience This textbook will provide a better teaching and learning experience--for you and your students. Here's how: The basic, introductory topics provide a firm foundation. Job-ready details help students train for the workplace by building an understanding of the details of networking. The latest in networking techniques and wireless networking, including a focus on security, keeps students up to date and aware of what's going on in the field. The flow of the text guides students through the material.
Author: Ian Talbot
Publisher: Cambridge University Press
ISBN: 9780521672566
Category : History
Languages : en
Pages : 224
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Book Description
The British divided and quit India in 1947. The partition of India and the creation of Pakistan uprooted entire communities and left unspeakable violence in its trail. This volume tells the story of partition through the events that led up to it, the terrors that accompanied it, to migration and resettlement. In a new shift in the understanding of this seminal moment, the book also explores the legacies of partition which continue to resonate today in the fractured lives of individuals and communities, and more broadly in the relationship between India and Pakistan and the ongoing conflict over contested sites. In conclusion, the book reflects on the general implications of partition as a political solution to ethnic and religious conflict. The book, which is accompanied by photographs, maps and a chronology of major events, is intended for students as a portal into the history and politics of the Asian region.
