Which Design Should I Use for a Paper Bridge

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Discussion Overview

The discussion revolves around selecting an appropriate design for a paper bridge project that must support a specific weight while adhering to material constraints. Participants explore various design options and considerations related to the mechanical properties of the materials involved.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Homework-related

Main Points Raised

  • One participant expresses uncertainty about where to start with the bridge design and mentions the need to create a poster based on the project requirements.
  • Another participant identifies a truss design from a referenced website, describing it as consisting of two plane trusses that support a deck.
  • A different participant inquires about specific designs that may be effective, referencing another website focused on truss designs.
  • Another contribution emphasizes the importance of considering the mechanical properties of the paper, suggesting that understanding the rupture stress and creating a Stress-Strain diagram would be beneficial for the design process.

Areas of Agreement / Disagreement

Participants have not reached a consensus on a specific design, and multiple viewpoints regarding design considerations and approaches remain present.

Contextual Notes

Participants mention the need to consider mechanical properties such as Young's modulus and rupture stress, but do not provide specific calculations or assumptions related to these factors.

petern
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I'm trying to build a bridge but I have no clue where to start. I need to make a poster first but I don't know which design to use.

I have found a website with the exact same project I need to make. For all the details, please go to www.gravitykills.net.

It has to be made of paper, hold 105 kg, and weigh no more than 125 g.

What I'm trying to do now is select a design and make a poster. The instructions for the poster are on that website.
 
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The bridge's design in the webpage is a truss. It's basically 2 plane trusses that hold a deck, and joined together by members.
 
Well a good design need to take into account mechanical properties of the construction material such as young's modulus. You take one of the members and see what is rupture stress of the paper and such. Basically a Stress-Strain diagram of the material will be useful.
 

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