Author2022 TCNJ Steel Bridge Team |
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Bridge Design Alterations11/18/2021 After meeting multiple times with the faculty advisor, industry advisor, and machine shop foreman, the team made revisions to the original final design to make it easier to assemble, easier to construct, and better performance. The first change that was made was to the stringer members. Originally, it featured 2 foot uniform members throughout the whole stringer. In the new and improved bridge, eight 3 foot members were placed where possible to reduce the number of connections and members. All except two members now feature a 2 inch offset for the cross bars, which was done for ease of connection. The 2 members that connect to the westernmost footings still feature crossbars that are flush with the edge of the member for stability purposes. Lateral supports were also altered to improve the bridge's resistance to sway. Three 32 inch by 3 inch lateral support members are featured between the footings while three 32 inch by 5 inch lateral support members are placed in the cantilevered end. The bridge also features three X shaped lateral supports. The bridge now consists of 69 total members, 85 connections, and weighs around 284 lbs. While this bridge is considerably heavier than the previous design, the team feels that these changes will overall improve the bridge's performance at competition.
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