Comments on: Bridge Height

By: MB

MB — Fri, 09 Sep 2011 04:23:00 +0000

what would be a good formula or rule of thumb to chose the number of trusses for building a model bridge?

By: Garrett Boon

Garrett Boon — Sun, 31 Oct 2010 19:09:46 +0000

The sketches do not need to be switched. They are exactly as I want them.

By: Bryan

Bryan — Tue, 09 Feb 2010 18:15:07 +0000

The sketches are backwards, the information in them needs to be swapped. (just incase anyone gets confused at first glance…)

By: ihtsham haider

ihtsham haider — Wed, 03 Feb 2010 17:45:25 +0000

hi,,,,
sorry to say he defined the 6:1 rather 8:1
so ur bridge height should be 4 units

By: bapi

bapi — Tue, 05 Jan 2010 16:44:25 +0000

the post on Bridge Height tackles the load distribution in rising the bridge. You talk about the bridge in terms of total length versus total height. But what about how many diagonals are necessary for a given lenght? Or how low can the angle of these diagonals be? (the less diagonals, the less material necessary)

By: Mike

Mike — Sun, 06 Dec 2009 05:33:47 +0000

Does the 6:1 ration apply to bridges that are elevated? I’m doing the SciOly elevated bridge event for division C.

By: Bill

Bill — Fri, 27 Nov 2009 16:21:14 +0000

Thanks for the post. I have a backyard project that needs a 25 foot bridge. (mostly decorative, but would be embarrasing to have it collapse) The math is what I was lacking.

By: confused

confused — Wed, 25 Nov 2009 23:02:12 +0000

Is an arch bridge more efficient than a truss bridge?
Also, in a situation where the ratio is at most 2:1, what kind of bridge should be built?

By: Bridgebuilder

Bridgebuilder — Sat, 05 Sep 2009 13:47:39 +0000

I need to make a strong, light bridge for my class. Is the K-Beam the best option, and if so, what is the best way to build this? I REALLY need the info for my eighth grade elective! The bridge must be 14-16in. long, 4in. wide, and 4-6 in. long.

By: USMAN

USMAN — Wed, 17 Jun 2009 10:11:18 +0000

I m making an arc bridge model of 24 inch span then according to the rule of 1:6 its height should be 4 inch. Will it be enough? and one thing more how can we check the strength of a toothpick and its different sections?