Lift Bridges by

Lift Bridges by https://padlet.com/benkelly9/vq7kxep06nmu Made with a wish on a star en-us 2016-09-12 12:01:34 UTC 2023-03-25 03:41:20 UTC hello@padlet.com r_lombard600 https://padlet.com/benkelly9/vq7kxep06nmu/wish/123081492 2016-09-12 12:17:09 UTC https://padlet.com/benkelly9/vq7kxep06nmu/wish/123081492 http://www.bristol.ac.uk/civilengineering/bridges/Pages/NotableBridges/TowerBridge.html benkelly9 https://padlet.com/benkelly9/vq7kxep06nmu/wish/123704138 2016-09-14 10:06:18 UTC https://padlet.com/benkelly9/vq7kxep06nmu/wish/123704138 benkelly9 https://padlet.com/benkelly9/vq7kxep06nmu/wish/123704995 2016-09-14 10:12:51 UTC https://padlet.com/benkelly9/vq7kxep06nmu/wish/123704995 The trunnion bascule lift bridge was designed by the American engineer, Joe Strauss, a pioneer of lift bridge design. Completed in 1916, it is a single leaf lift span made of a steel girder truss balancing on a trunnion pivoting against a concrete counterweight. r_lombard600 https://padlet.com/benkelly9/vq7kxep06nmu/wish/123705069 2016-09-14 10:13:28 UTC https://padlet.com/benkelly9/vq7kxep06nmu/wish/123705069 The bridge can hold up to 18 tonnes of weight at one time. Maximum angle of the bascule is 86 degrees Total length of the bridge in 800 feet/286.5 metres The width of the bridge is 18.3 metres The height of each tower is 65 metres/213 feet Iron boxes were sunk 6.5 metres into the bed of the rivers made of solid concrete. Materials Steel clad in granite and stone masonry Building time 1886 – 1896 The cost of the bridge was £1,184, 000 Height above water The bridge in raised over 1000 times a year benkelly9 https://padlet.com/benkelly9/vq7kxep06nmu/wish/123705296 The central span of 200 feet (61 metres) between the towers is split into two equal bascules or leaves, which can be raised to an angle of 86 degrees to allow river traffic to pass. ]]> 2016-09-14 10:15:25 UTC https://padlet.com/benkelly9/vq7kxep06nmu/wish/123705296 r_lombard600 https://padlet.com/benkelly9/vq7kxep06nmu/wish/123706379 2016-09-14 10:23:43 UTC https://padlet.com/benkelly9/vq7kxep06nmu/wish/123706379 Structure Type: Metal 8 Panel Rivet-Connected Warren Through Truss, Movable: Single Leaf Bascule (Heel Trunnion)                      Construction Date and Builder / Engineer: 1917 By Builder/Contractor: Unknown   and Engineer/Design:  Strauss Bascule Bridge Company (Strauss Engineering Company) of Chicago, Illinois.                                                       Main Span Length:  170 Feet (51.8 Meters) Structure Length:  212 Feet (64.6 Meters) Roadway Width:  24 Feet (7.3 Meters)          Spans: 2 Main Span(s) r_lombard600 https://padlet.com/benkelly9/vq7kxep06nmu/wish/123708653 2016-09-14 10:38:10 UTC https://padlet.com/benkelly9/vq7kxep06nmu/wish/123708653 r_lombard600 https://padlet.com/benkelly9/vq7kxep06nmu/wish/123710184 2016-09-14 10:48:22 UTC https://padlet.com/benkelly9/vq7kxep06nmu/wish/123710184 r_lombard600 https://padlet.com/benkelly9/vq7kxep06nmu/wish/123710336 2016-09-14 10:49:12 UTC https://padlet.com/benkelly9/vq7kxep06nmu/wish/123710336 Lifting Mechanism                                                                                                                   One or more trunnions are mounted on supports within the pier.                                     A counterweight is constructed and placed inside the pier.                                                 Gear drives and/or hydraulic lift mechanisms are installed in the pier.                       Two side girders are constructed for the heel section of each leaf of the bridge. A trunnion bearing is mounted in an opening in each girder. The girder may be equipped with gears that will mesh with the lift mechanism, or it may be fitted with paddles that hydraulic rams can push against. The two side girders are lifted into the pier and eased over the ends of the trunnion. The heel section is completed with a crossbeam connecting the two side girders. The counterweight is attached to the heel section. r_lombard600 https://padlet.com/benkelly9/vq7kxep06nmu/wish/123712177 2016-09-14 11:00:21 UTC https://padlet.com/benkelly9/vq7kxep06nmu/wish/123712177 http://www.madehow.com/Volume-6/Draw-Bridge.html r_lombard600 https://padlet.com/benkelly9/vq7kxep06nmu/wish/123712845 2016-09-14 11:05:56 UTC https://padlet.com/benkelly9/vq7kxep06nmu/wish/123712845 benkelly9 https://padlet.com/benkelly9/vq7kxep06nmu/wish/124028974 2016-09-15 12:44:09 UTC https://padlet.com/benkelly9/vq7kxep06nmu/wish/124028974