Comments on: What Bridge Design Holds the Most Weight?

By: Kyle

Kyle — Tue, 07 Feb 2012 01:18:17 +0000

LOL. That would be my result!

What types of materials can you use to make a drawbridge that can hold the weight of many cars at one time?

I haven’t been lucky enough to see many drawbridges but up in Portland Oregon they are mostly steel (the parts that raise and lower)
and concrete at the pillars that hold the bridge up.

By: adi

adi — Wed, 16 Nov 2011 04:26:18 +0000

I created an expirement for my fourth grade science fair that tested both the flat truss and the warred truss using the exact same materials; balsa wood and glue. The flat truss held up 46.3 pounds of water, the warren only held 30.9. They both were across a span of eleven inches and in the end I only had chunks of demolished bridge…

By: Ashleysn8

Ashleysn8 — Mon, 17 Oct 2011 00:15:00 +0000

i have to make one that’s 11 inches and holds more than 25 lb and i’m in 6th grade

By: Hannah

Hannah — Thu, 13 Oct 2011 14:07:00 +0000

thats what im doing right now !

By: Bnjwill97

Bnjwill97 — Thu, 06 Oct 2011 07:14:00 +0000

in 8th grade making a bridge to hold weights

By: Brookequinn10

Brookequinn10 — Tue, 26 Jul 2011 06:36:00 +0000

hi im in 5th grade and weve got a project we have to build a bridge and our teacher will be putting weights on it . what would be the strongest item to use plus whats a good famous bridge to get imformation for

By: lolsmileyface

lolsmileyface — Tue, 03 May 2011 19:35:00 +0000

Hi im in 6th grade and me and my partner have to build a bridge that is strong lightweight and easy to make it has to be atleast a foot long and under 85 grams we dont no much so we need help on what bridge to make and if you can an image would be nice thanks

By: Chika Athena

Chika Athena — Tue, 22 Mar 2011 23:01:00 +0000

I think you should use really thin yarn.

By: Experimenting Sophomore

Experimenting Sophomore — Mon, 25 Oct 2010 04:04:59 +0000

The best design would be a cable-stayed bridge-
Here’s an image:
http://www.roadtraffic-technology.com/projects/hangzhou/images/7-cable-stayed-bridge.jpg

However, I am currently doing a project with material that don’t allow this style of bridge or supports in the chasm, so I’m improvising best I can. I originally intended to attempt a suspension bridge, but have since changed it to an eye-looking thing held by triangles that disperse the weight to either side. I wish I had a picture to show you, but our camera is MIA at the moment.

I do not know the effectiveness of this bridge yet, and won’t until Tuesday, but feel free to give it a try if this is the type of project you’re dealing with as well.

By: 4th grader boy

4th grader boy — Fri, 22 Oct 2010 22:39:49 +0000

I am in the 4th grade and have to make a science project about what type of bridge holds the most weight? All new to me and might as well be a language from another planet. Can any one help? Is ther a formula to use?