PT1.2 3 Designs and Decision Making Matrix

Brainstorming of 3 designs

Before building the bridge, we had to plan and brainstorm our ideas. We used the West Point Bridge Builder Simulator software to see if our ideas worked out like we planned them to. Below are 3 of our designs: 


Design 1 (Girder Bridge)




Our first design is based of from a girder bridge. A girder or beam bridge, is arguably the most basic bridge. A log across a creek or perhaps even a plank is an example of a girder bridge in its simplest form. It is a very simple and sleek design.

Real life example: The Poplar Street Bridge

Design 2 (Truss Bridge)



Our second design is based of from a truss bridge. The name "truss bridge" is derived from its trusses. The truss is a simple skeletal structure. Trusses are made up of small beams that when put together can support large amounts of weight and also span great distances. 

Real life example: The Old Chain of Rocks Bridge

Design 3 (Suspension Bridge)




Our third design is based of from a suspension bridge. The suspension bridge allows for the longest spans in terms of length. A typical suspension bridge is a continuous girder with one or more towers erected above piers in the middle of the span. In our design, we decided to add two towers.


Real life example: The Golden Gate Bridge


Ranking and Decision Making Matrix





And so, using the decision making matrix constructed above, we have decided to use design 1.


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