John Augustus Roebling, Builder of the Brooklyn Bridge

John Augustus Roebling, Builder of the Brooklyn Bridge John Roebling (born June 12, 1806, Mà ¼hlhausen, Saxony, Germany) didnt invent the suspension bridge, yet he is well-known for building the Brooklyn Bridge. Roebling didnt invent spun wire roping, either, yet he became wealthy by patenting processes and manufacturing cables for bridges and aqueducts. He was called a man of iron, says historian David McCullough. Roebling died July 22, 1869, at age 63, from a tetanus infection after crushing his foot on the construction site of the Brooklyn Bridge. From Germany to Pennsylvania 1824 - 1826, Polytechnic Institute, Berlin, Germany, studying architecture, engineering, bridge construction, hydraulics, and philosopy. After graduating, Roebling built roads for the Prussian government. During this period, he reportedly experienced his first suspension bridge, Die Kettenbrà ¼cke (chain bridge) over the Regnitz in Bamberg, Bavaria.1831, sailed to Philadelphia, PA with his brother Karl. They planned to migrate to western Pennsylvania and develop a farming community, although they knew nothing about farming. The brothers bought land in Butler County and developed a town eventually called Saxonburg.May 1936, married Johanna Herting, the town tailors daughter1837, Roebling became a citizen and a father. After his brother died of heatstroke while farming, Roebling began working for the State of Pennsylvania as a surveyor and engineer, where he built dams, locks, and surveyed railroad routes. Building Projects 1842, Roebling proposed that the Allegheny Portage Railroad replace their continually breaking hemp coil ropes with steel coil ropes, a method he had read about in a German magazine. Wilhelm Albert had been using wire rope for German mining companies since 1834. Roebling modified the process and received a patent.1844, Roebling won a commission to engineer a suspension aqueduct to carry canal water over the Allegheny River near Pittsburgh. The aqueduct bridge was successful from its opening in 1845 until 1861 when replaced by the railroad.1846, Smithfield Street Bridge, Pittsburgh (replaced in 1883)1847 - 1848, the Delaware Aqueduct, the oldest surviving suspension bridge in the U.S. Between 1847 and 1851 Roebling built four DH Canal aqueducts.1855, Bridge at Niagara Falls (removed 1897)1860, Sixth Street Bridge, Pittsburgh (removed 1893)1867, Cincinnati Bridge1867, Plans the Brooklyn Bridge (Roebling died during its construction)1883, Brooklyn Bridge completed under the direction of his oldest son, Washington Roebling, and his sons wife, Emily Elements of a Suspension Bridge (e.g., Delaware Aqueduct) Cables are attached to stone piersCast iron saddles sit on the cablesWrought-iron suspender rods sit on the saddles, with both ends hanging vertically from the saddleSuspenders attach to hanger plates to support part of the aqueduct or bridge deck flooring Cast iron and wrought iron were new, popular materials in the 1800s. Restoration of the Delaware Aqueduct 1980, bought by the National Park Service to be preserved as part of Upper Delaware Scenic Recreational RiverAlmost all of the existing ironwork (cables, saddles, and suspenders) are the same materials installed when the structure was built.The two suspension cables encased in red piping are made of wrought iron strands, spun on site under the direction of John Roebling in 1847.Each 8 1/2-inch diameter suspension cable carries 2,150 wires bunched into seven strands. Laboratory tests in 1983 concluded that the cable was still functional.Wrapping wires holding the cable strands in place were replaced in 1985.In 1986, the white pine wooden superstructure was reconstructed using Roeblings original plans, drawings, notes, and specifications Roeblings Wire Company In 1848, Roebling moved his family to Trenton, New Jersey to start his own business and take advantage of his patents. 1850, established John A. Roeblings Sons Company to manufacture wire rope. Of Roeblings seven adult children, three sons (Washington Augustus, Ferdinand William, and Charles Gustavus) would eventually work for the compnay1935 - 1936, oversaw the cable construction (spinning) for the Golden Gate Bridge1945, provided the flat wire to the inventor of the toy1952, business sold to the Colorado Fuel and Iron (CFI) Company of Pueblo, Colorado1968, the Crane Company purchased the CFI Wire rope cabling has been used in a variety of situations including suspension bridges, elevators, cable cars, ski lifts, pulleys and cranes, and mining and shipping. Roeblings U.S. Patents Patent Number 2,720, dated July 16, 1842, Method of and Machine for Manufacturing Wire RopesWhat I claim as my original invention and desire to secure by Letters Patent is: 1. The process of giving to the wires and strands a uniform tension, by attaching them to equal weights which are freely suspended over pulleys during the manufacture, as described above. 2. The attaching of swivels or of pieces of annealed wire to the ends of the single wires or to the several strands, during the manufacture of a rope, for the purpose of preventing the twist of the fibers, as described above. 3. The manner of constructing the wrapping machine....and the respective parts of which are combined and arranged, as above described, and illustrated by the accompanying drawing, so as to adapt it to the particular purpose of winding wire upon wire ropes.Patent Number 4,710, dated August 26, 1846, Anchoring Suspension-Chains for BridgesMy improvement consists in a new mode of anchorage applicable to wire br idges as well as chain bridges...What I claim as my original invention and wish to secure by Letters Patent is The application of a timber foundation, in place of stone, in connection with anchor plates, to support the pressure of the anchor chains or cables against the anchor masonry of a suspension bridge for the purpose of increasing the base of that masonry, to increase the surface exposed to pressure, and to substitute wood as an elastic material in place of stone, for the bedding of the anchor plates, the timber foundation either to occupy an inclined position, where the anchor cables or chains are continued in a straight line below ground, or to be placed horizontally, when the anchor cables are curved, as exhibited in the accompanying drawing, the whole to be in substance and in its main features constructed as fully described above and exhibited in the drawing. Patent Number 4,945, dated January 26, 1847, Apparatus for Passing Suspension-Wires for Bridges Across RiversWhat I claim as my original invention, and wish to secure by Letters Patent, is The application of traveling wheels, suspended and worked, either by a double endless rope, or by a single rope, across a river or valley, for the purpose of traversing the wires for the formation of wire cables, the whole to be in substance and in its main features, constructed and worked, as above described, and illustrated by the drawings. Archives and Collections for Further Research John A. Roebling Collection, National Museum of American History, Smithsonian InstitutionThe Roebling Museum, Roebling, New JerseyThe Delaware and Hudson Canal Slide Show, National Park Service, U.S. Department of the Interior Sources The Great Bridge by David McCullough, New York: Simon and Schuster, 1972, Chapter 2John Roebling, Upper Delaware, National Park ServiceRoeblings Delaware Aqueduct, National Park ServiceAllegheny Portage Railroad, History and Culture, National Park ServiceRoebling and the Brooklyn Bridge, The Library of CongressModern History of Wire Rope by Donald SayengaUnited States Patent and Trademarks Office, Department of CommerceAdditional inline photo  ©Jackie CravenAll websites accessed June 11, 2012

Direct Managers Letter of Recommendation for an Employee

Direct Manager's Letter of Recommendation for an Employee SAT / ACT Prep Online Guides and Tips What does a good recommendation letter look like? Below you’ll find a sample letter written by a direct manager for an employee who works in software sales. If you’re responsible for managing or leading a team, chances are you’ll be called upon to write similar letters. Read on to see how this manager endorses one member of his sales team, and then check out the breakdown of what this letter does well. Sample Letter #1: Written by a Manager for a Full-Time Employee Ms. Greta JohanssenSales ManagerStreambase Corp.66 Western BoulevardSanta Fe, New Mexico 87500 Dear Ms. Johanssen, It’s my pleasure to provide this letter of recommendation for James as he seeks employment in software sales with Streambase. As James’s sole direct manager at Waretech, I’ve worked closely with him over the past three years, sharing the same open office space the majority of the time. James showed excellent communication skills and consistently exceeded company quotas. On a personal level, he’s charismatic and well-spoken, both qualities that have served him well in his role as software sales professional. Due to his wife’s cross-country transfer, James is seeking employment out west. All of us at Waretech will be sad to see such a valuable employee go, but our loss is truly your gain. Allow me to point out three examples of James’s strengths. First, James brought great value to Waretech by consistently exceeding quotas and selling in the top 15% of his peers. James has an understanding of market trends and instincts for identifying and pursuing qualified leads. Not only does he provide stellar service to existing clients, but he’s established a number of new business-to-business and business-to-customer accounts during his time at Waretech. Last fall, for instance, he added Voxacorp to our client list, a huge acquisition, and has been working closely with its IT department ever since. James has the combination of business acumen and communication skills that makes him an outstanding salesperson. Second, James has a very strong grasp of technology. He knows our software inside and out and helps relay technical information to customers in an accessible way. He explains our products clearly to customers and makes the most of technological avenues to gain new leads and customize his sales pitch to clients. During an early review, I observed him discuss in detail with a prospective client the specific ways that our software could boost the sales of her online bakery. By monitoring clients’ presence across our website and blog, he provides each one with personalized service to meet his/her needs. James makes the most of technology to find new prospects, provide modern solutions, and drive results. Finally, James has proven himself to be a strong cultural fit here at Waretech. He’s always ready to lend a helping hand to his teammates and contributes during brainstorming sessions and meetings between the sales and marketing teams. Last month, James co-led an enlightening meeting on content marketing and account management. Outside of official events, James also takes turns leading weekly spin classes at our in-house gym. James is an active member of the Waretech team and supports his colleagues professionally and personally (not to mention athletically!). In closing, I’d like to restate my strong support for James’s application to the role of software sales professional with Streambase. I’m confident that he will surpass your expectations in this new role. James is driven, self-confident, proactively helpful, and smart, and I know he will continue to find success in sales. Please feel free to contact me at (866) 8-5546 or ssaasman@waretech.com with any other questions. Thank you for your time. Sincerely, Samuel SaasmanSales ManagerWaretech, Inc.ssaasman@waretech.com(866) 8-5546 Based on this letter, should James pack his bags and get ready to move out west? Recommendation Letter 1: The Breakdown This first recommendation letter sample represents a common type of letter,one written by a direct manager for an employee who’s applying to a new company. Right off the bat, the writer gives a strong statement of support for James by saying that it’s his great pleasure to provide the recommendation. If he started by simply saying, â€Å"I am writing this letter of recommendation for James,† it wouldn’t have quite the same impact. Samuel Saasman incorporates the first key feature of strong letters by stating who he is and how he got to know James. He also indicates the reason that James is applying elsewhere. Including this information can be useful for the hiring manager, especially if it’s followed by a statement of support like, â€Å"Our loss is truly your gain.† Samuel structures his letter by presenting three of James’s major strengths: his sales record, his use of technology, and his relationships with his co-workers. This structure can be an effective one for recommendation letters; some writers might choose to use bullet points to clarify their thinking. Samuel writes about James’s qualifications while incorporating specific examples in each paragraph to illustrate his work performance. Since James is applying to a similar position in software sales, all of the strengths described relate directly to the requirements of his target job. Samuel recommends James with highly positive language. He repeats his strong support of James several times and his confidence in his future success. He seems to have chosen with words carefully, using strong descriptors like â€Å"charismatic,† â€Å"driven,† and â€Å"proactively helpful.† As is the custom for recommendation letters, he concludes by inviting the hiring manager to contact him with any further questions. Overall, Samuel writes a glowing letter for James’s application to a new job in software sales. His high opinion is evident, and his examples prove that James has the qualifications to excel in his next position. What's Next? Ready for the next recommendation letter sample? Click hear to read a sample letter written by a principal for a teacher applying to a new school. Want to learn more? If you want to readabout what goes into a strong letter of recommendation or find additional samples, you can head tothe full guide here. Want to provide a strong recommendation for your employee, but don't have the time to craft the perfect letter? PrepScholar's new recommendation tool, SimpleRec, takes you from good intentions and a blank page to a fully written and formatted letter of recommendation in under 5 minutes. All you need to do is give us some simple pieces of information about your employee and your experience working with them, and we'll do the rest. Try out SimpleRec risk-free today: Have friends who also need help with test prep? Share this article! Tweet Rebecca Safier About the Author Rebecca graduated with her Master's in Adolescent Counseling from the Harvard Graduate School of Education. She has years of teaching and college counseling experience and is passionate about helping students achieve their goals and improve their well-being. She graduated magna cum laude from Tufts University and scored in the 99th percentile on the SAT. Get Free Guides to Boost Your SAT/ACT Get FREE EXCLUSIVE insider tips on how to ACE THE SAT/ACT. 100% Privacy. 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