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" THE CANTILEVER BRIDGE " 1951 UNITED STATES STEEL ENGINEERING & CONSTRUCTION FILM MD10405 скачать в хорошем качестве

" THE CANTILEVER BRIDGE " 1951 UNITED STATES STEEL ENGINEERING & CONSTRUCTION FILM MD10405 8 месяцев назад

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" THE CANTILEVER BRIDGE " 1951 UNITED STATES STEEL ENGINEERING & CONSTRUCTION FILM MD10405

Join this channel to get access to perks:    / @periscopefilm   Help us preserve, scan and post more rare and endangered films! Join us on Patreon. Visit   / periscopefilm   Visit our website www.PeriscopeFilm.com This 1951 film from United States Steel, "The Cantilever Bridge", was made by Jam Handy Productions. It presents a detailed explanation of the construction and engineering principles behind Calver bridges, also known as cantilever bridges. It covers the basic concept using a seesaw analogy, explains technical terms, and provides historical context and examples of famous Calver bridges like the Forth Bridge and the Quebec Bridge. The text also describes the construction process of the Tappan Zee Bridge, highlighting the engineering challenges, logistical efforts, and the role of bridgemen in building such massive structures. 0:26 - 0:57: Introduction to the concept of a seesaw as a simple beam bridge, leading to the idea of a cantilever bridge. 1:00 - 1:26: Technical terms explained: pivotal points (main piers), weights (anchorages), anchor piers, anchor arms, cantilever arms, and suspended span. 1:31 - 2:00: Description of various types of canal bridges and their structures, including beam and girder, calers, and truss cantilever. 2:00 - 2:32: Preference for through trusses in bridge design due to their simplicity, rigidity, and economy. 2:35 - 3:11: Historical context of Calver bridges, mentioning the Forth Bridge and the Quebec Bridge. 3:14 - 3:40: Details about the San Francisco-Oakland Bay Bridge, its structure, and traffic capacity. 3:42 - 4:06: Plans for constructing the Tappan Zee Bridge, highlighting the engineering and logistical challenges. 4:08 - 5:02: Description of the material and logistical efforts required for the Tappan Zee Bridge construction. 5:02 - 6:02: The process of floating and positioning bridge spans using high tide and car floats. 6:04 - 7:11: Construction of the Calver portion of the bridge, including the use of buoyant caissons for foundation support. 7:14 - 8:02: Use of falsework (temporary supports) for the anchor arms during construction. 8:02 - 9:13: Dual use of material for cost-saving and the process of positioning falsework spans. 9:15 - 10:01: Erection of steel towers and the balanced erection method for the superstructure. 10:03 - 11:12: Challenges faced during construction, including hurricanes, and the importance of weight balance. 11:14 - 12:04: Role of temporary falsework and the precision required in construction. 12:06 - 13:00: Description of the bridgemen's work and the safety measures in place. 13:00 - 14:18: Advantages of Calver bridges, including uninterrupted river traffic and the use of hand signals for communication. 14:20 - 15:48: Detailed process of lifting and positioning steel members, including the use of rivets. 15:50 - 17:09: Importance of falsework and the process of extending anchor arms to meet anchor towers. 17:11 - 18:03: Removal of falsework once it has served its purpose. 18:05 - 19:01: Final stages of construction, including the preparation and placement of the bottom cord. 19:03 - 20:09: Closing the center span and the intricate maneuver of swinging the suspended span. 20:12 - 21:27: Final adjustments and the completion of the bridge, highlighting the amount of steel used. 21:30 - 23:30: Description of the completed Tappan Zee Bridge and its features designed for safety and future traffic. 23:43 - 23:48: Conclusion with a poetic note on the new master of the Hudson River. The Tappan Zee Bridge, was a cantilever bridge in the U.S. state of New York. It was built from 1952 to 1955 to cross the Hudson River at one of its widest points, 25 miles (40 km) north of Midtown Manhattan, from South Nyack to Tarrytown. As an integral conduit within the New York Metropolitan Area, the bridge connected South Nyack in Rockland County with Tarrytown in Westchester County in the Lower Hudson Valley. In 2013, federal and state authorities started constructing a replacement bridge at a cost of at least $4 billion. Motion picture films don't last forever; many have already been lost or destroyed. For almost two decades, we've worked to collect, scan and preserve the world as it was captured on 35mm, 16mm and 8mm movies -- including home movies, industrial films, and other non-fiction. If you have endangered films you'd like to have scanned, or wish to donate celluloid to Periscope Film so that we can share them with the world, we'd love to hear from you. Contact us via the weblink below. This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit http://www.PeriscopeFilm.com

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