Download or read book Azanian Bridges written by Nick Wood and published by . This book was released on 2016-04-01 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: A tense SF thriller set in an alternative South Africa where apartheid still holds sway and the struggle for equality continues. Sibisuso, an AmaZulu unwittingly caught up in the conflict, and Martin, a white psychologist, find their fates entwined via a machine that might just change the world...
Download or read book Wood Concrete Stone and Steel written by Denis Gardner and published by U of Minnesota Press. This book was released on 2008 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: Like never before we are aware of the crucial place of bridges in our lives. The spans that warranted little notice are now at the forefront of public and political debate and we are reminded of the rich history-and the uncertain future-of bridging in Minnesota. Historian Denis P. Gardner documents and celebrates a wide range of the state’s rural and urban spans, telling the remarkable stories of their construction and impact on Minnesota life and culture. From Pratt trusses to bowstring arches, Wood, Concrete, Stone, and Steel describes nearly every bridge type found in Minnesota, including railroad spans, and features more than 225 illustrations of historical and extant bridges. Gardner details the development of engineering and construction innovations (complete with a guide to trusses) and traces the fascinating politics and personalities behind the task of creating and maintaining safe, and often beautiful, crossings. Through arresting photographs and lively narrative, Gardner makes a compelling argument for the value of preserving our bridges and the cultural heritage they carry and brings to life their importance in Minnesota’s past, present, and future. Denis P. Gardner is an award-winning historian who has documented properties for the National Register of Historic Places and the Historic American Engineering Record. He is the author of Minnesota Treasures: Stories behind the State’s Historic Places. Eric DeLony is former director of the Historic American Engineering Record.
Download or read book Covered Bridges of Ohio written by Miriam F. Wood and published by Thunder Bay Press (MI). This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive chronological record of historical events and information on Ohio's wooden truss bridges lavishly illustrated with over 200 black-and-white photographs and drawings. Discusses the architecture, design, history, local lore and the location of hundreds of these hard-to-find and often endangered historical treasures. A fascinating glimpse into the past and a must for dedicated bridgers anywhere.
Download or read book Timber Bridges written by Michael A. Ritter and published by . This book was released on 1990 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents a comprehensive analysis of the design, construction, inspection, and maintenance of timber bridges.
Download or read book The Portland Bridge Book written by Sharon Wood Wortman and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This history of Portland's bridges includes all the bridges on the Willamette River from the St. Johns to Oregon City, plus three bridges on the Columbia.
Download or read book Timber Bridges written by Michael A. Ritter and published by Datamotion Publishing LLC. This book was released on 1990 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents a comprehensive analysis of the design, construction, inspection, and maintenance of timber bridges.
Download or read book Wood Bridges written by Wallace E. Eslyn and published by . This book was released on 1979 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wood Bridges written by Wallace E. Eslyn and published by . This book was released on 1979 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bridges written by Robyn Hardyman and published by The Rosen Publishing Group, Inc. This book was released on 2016-12-15 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridges are some of the most beautiful and useful products of math we encounter in our daily lives. This detailed text will teach readers exciting and age-appropriate facts about the engineering behind these structural wonders. Readers will see record-breaking masterpieces from across the globe, such as “living bridges” built into trees in India. Spectacular photographs, an easy-to-read map, and fun fact boxes will engage all readers. A concluding engineering activity is perfect for kinesthetic learners who love to work with their hands!
Download or read book American Wooden Bridges written by American Society of Civil Engineers. Committee on History and Heritage of American Civil Engineering and published by . This book was released on 1976 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book American Barns and Covered Bridges written by Eric Sloane and published by Courier Corporation. This book was released on 2002-01-01 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This lovingly written book presents reliable records of such vanishing forms of architecture as the American barn and covered bridge. Delightful anecdotes accompany accurate line drawings of barns attached to houses, an "open" log barn in Virginia, a "top hat" barn in North Carolina, and more. Over 75 black-and-white illustrations.
Download or read book A Treatise on Wooden Trestle Bridges written by Wolcott Cronk Foster and published by . This book was released on 1894 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Species Identification and Design Value Estimation of Wooden Members in Covered Bridges written by Alex C. Wiedenhoeft and published by . This book was released on 2014 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wood in Transportation Program written by Wood in Transportation Program (U.S.). and published by . This book was released on with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Species Identification and Design Value Estimation of Wooden Members in Covered Bridges written by Alex C. Wiedenhoeft and published by CreateSpace. This book was released on 2015-06-26 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covered timber bridges are historic structures with unique aesthetic value. To preserve this value and maintain bridges in service, robust evaluation of their performance and safety is necessary. The strength of the timber found in covered bridges can vary considerably, not only because of age and condition, but also because of species and grade. For the practicing engineer or inspector evaluating a covered bridge, design values for existing wood members must be determined with as much accuracy as possible by account-ing for bridge-specific conditions. The current practice is to assign wood values for strength and moduli from existing specifications without specific reference to timber species, condition, or grade, which can result in an inaccurate assess-ment of the structure. This manual provides a walk-through for basic wood identification, inspection, condition assess-ment, field grading, and design value estimation for wood in covered bridges.
Download or read book Timber Bridges written by Michael A. Ritter and published by . This book was released on 1990 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of the Environmental Effects Associated with Wooden Bridges Preserved with Creosote Pentachlorophenol Or Chromated Copper Arsenate written by Kenneth M. Brooks and published by . This book was released on 2000 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Timber bridges provide an economical alternative to concrete and steel structures, particularly in rural areas with light to moderate vehicle traffic. Wooden components of these bridges are treated with chromated copper arsenate type C (CCA), pentachlorophenol, or creosote to prolong the life of the structure from a few years to many decades. This results in reduced transportation infrastructure costs and increased public safety. However, the preservative used to treat the wooden components in timber bridges is lost to the environment in small amounts over time. This report describes the concentration of wood preservatives lost to adjacent environments and the biological response to these preservatives as environmental contaminants. Six bridges from various states were examined for risk assessment: two creosote treated bridges, two pentachlorophenol-treated bridges, and two CCA-treated bridges. In all cases, the largest bridges located in biologically active environments associated with slow-flowing water were selected to represent worst-case analyses. Sediment and water column concentrations of preservative were analyzed upstream from, under, and downstream from each bridge. The observed levels of contaminant were compared with available regulatory standards or benchmarks and with the quantitative description of the aquatic invertebrate community sampled from vegetation and sediments. Pentachlorophenol- and creosote-derived polycyclic aromatic hydrocarbons (PAHs) were not observed in the water near any of the selected bridges. However, low levels of PAHs were observed in the sediments under and immediately downstream from these bridges. Pentachlorophenol concentrations did not approach toxicological benchmarks. Sediment concentrations of naphthalene, acenaphthylene, and phenanthrene exceeded the probable effect level. Metal levels at the bridges treated with CCA were less than predicted effect levels, in spite of questionable construction practices. Adverse biological effects were not observed in the aquatic invertebrate community or laboratory bioassays conducted on water and sediments sampled at each of the bridges. Results of this study reveal the need to follow the construction information found in Best Management Practices for the Use of Treated Wood In Aquatic Environments published by Western Wood Preservers Institute. Regulatory benchmarks used in risk assessments of this type need to be indexed to local environmental conditions. The robust invertebrate communities associated with slow-moving streams over soft bottoms were not susceptible to the concentrations of PAHs that would be expected to affect more sensitive taxa, which typically are located in faster moving water over hard bottoms. Contaminants released from timber bridges into these faster systems (where more sensitive taxa are located) are significantly diluted and not found at biologically significant levels.
