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Bridge

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_TK_
Posts: 467 - Karma: 128
Alright so I have to build a bridge for school, and it has to be able to hold 75 pounds does anyone know of any good ideas or structures they've used before or any ideas on design or structure? Any ideas would be assume +K for good responses.
Mar 7 2010 8:50PM
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DirtyDiabetic
Posts: 308 - Karma: 11
what is your building material?
Mar 7 2010 8:52PM
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Gameboy
Posts: 2657 - Karma: 127

If it's in popsicles sticks a bridge like that held more than 200 pounds

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Mar 7 2010 8:56PM
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Parrish
Posts: 8695 - Karma: 1,008
Dimensions? Also, amount of material/material available? What would be good would be a

Truss Bridge
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I Beams in your bridge
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Arch Bridge
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Those are simple to build but still have strength. I would recommend a Truss Bridge with some I Beams.
Mar 7 2010 8:58PM
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Cheezcake.
Posts: 721 - Karma: 22
i googled this when i had the same project, and the first one that popped up only used 40 popsicle sticks and ended up holding like 110 pounds.
Mar 7 2010 10:20PM
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Backyard.Skier
Posts: 5397 - Karma: 1,497
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also build it with lots of triangles
Mar 8 2010 12:43AM
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_TK_
Posts: 467 - Karma: 128
its some sort of wood you have to buy at a craft store cant remember the except name
Mar 8 2010 8:54PM
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gnarles.
Posts: 2587 - Karma: 130
it doesnt matter the design i built one this year with straws and all u have to do is make shure its made out of triangles
Mar 8 2010 8:58PM
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dwhite
Posts: 1499 - Karma: 32
Balsa?

I used to dominate those bridge projects. Make a truss bridge or something that utilizes equilateral triangles. Equilateral triangles rock shit on bridges.
Mar 8 2010 8:59PM
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davar6
Posts: 555 - Karma: 24
Would that be balsa wood? If so i did the exact same project and yea i stand by triangles for strength. Its the strongest shape other than an arch if i remember correctly. And yea a classic truss bridge will do fine.
Mar 8 2010 9:00PM
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Ben.
Posts: 21463 - Karma: 683
i did something like the first one out of toothpicks that held like 40 lbs. you can definitely do better with balsa than toothpicks
Mar 8 2010 9:01PM
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