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Old 03-28-2006, 06:53 AM
Harleyrider Harleyrider is offline
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Default I-Beam load

I have 3 bridges in the woods put in 18 years ago. The wood decking is rotted and being replaced with 2" black locust.
The I-beams are S8 x 18.4 span is 8 ft. with a cross brace made of 3x3 angle. abuttments are stable The steel looks good with just surface rust.

How much weight can I safely drive over this bridge?
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Old 03-28-2006, 04:43 PM
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LW Hiway LW Hiway is offline
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Within this site, there are charts and references to tables of the load capabilities of steel structurals.

But, if I was asking this question, I'd research the local university and find a Senior Engineering student to do a look see or hire an engineer.

I'm no bridge builder, but there are some on this site that could point you in a more narrow direction for that info.
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Old 03-28-2006, 04:50 PM
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LW Hiway LW Hiway is offline
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Have you met Cutter yet?

Welcome to the site.

If you would, could you add your location in the area called User CP located by clicking in the upper left hand corner of these pages. It is, as will be mentioned, a little site observance of courtesey for us "others", as it may allow us to better answer or formulate responses particular to your area.

With doing a search within the site I came up with 2 threads for information on beam loading. Although the intent of the discussion was other than "bridge construction", you can see the additions of information of beam span use and the tables of steel sizing to weight.

The first thread dealt with a members use of beams for a large weight loading for his loft construction in his shop, but the information will allow a good read.

http://www.shopfloortalk.com/forums/...t=beam+loading

Here is the second thread:

http://www.shopfloortalk.com/forums/...ead.php?t=1314

I hope someone else jumps in here on this and shuts me up before I do some real damage.
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God, if you would grant me one request through Prayer, please help me be the Man my Dog thinks I am. Please.

Quoting "The Hunt". "A man will walk into hell with both eyes and arms wide open. His dog will know better."

I never thought I'd live long enough to become a grumpy old bastard. Here I am, killing it!

Last edited by LW Hiway; 03-28-2006 at 06:40 PM.
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  #4  
Old 03-28-2006, 11:36 PM
Cedarcreek Cedarcreek is offline
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Default Beams

Welcome to the best welding site on the web.

A S8 X 18.4 beam with a 8' span is good for a load of 14400 pounds in the center. I would derate that some since it is a moving load and not all the beams are going to be loaded equally just to be on the safe side. I'm not an engineer so getting one to run the numbers for you would be the best
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Old 03-28-2006, 11:54 PM
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precisionworks precisionworks is offline
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Welcome!

What kind of Harley?

Electraglide Classic here, about 5000 miles/year, always two up.

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Old 03-28-2006, 11:59 PM
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Quote:
Originally Posted by lwhiway
Have you met Cutter yet?

Welcome to the site.

If you would, could you add your location in the area called User CP located by clicking in the upper left hand corner of these pages. It is, as will be mentioned, a little site observance of courtesey for us "others", as it may allow us to better answer or formulate responses particular to your area.
Good job, LW,

Harleyrider, here is the standard location blurb:

We try to maintain a little custom around here of posting our locations in our user profiles; that way it appears in every post or reply that you make. If you look at the upper right hand corner of this window you will see that I am located in Lubbock,Texas. We have found this to be especially helpful because so many of our threads wind up in discussions of where to find parts, materials or some activity where local conditions are a factor. You will probably be surprised how often this is true here. Besides that, we're just naturally nosy & like to know where everyone's coming from. Posting it one time in a reply is not the same as doing it automatically in every reply.

If you would please, look in the upper left area of this page at the blue banner with white lettering, click on "User CP" to open your control panel; click "edit profile"and scroll down to the location line & fill it in. City & state / province is sufficient. Then be sure to scroll on down to the bottom of the page & click "save changes" & you're done. We will appreciate it.
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