Mechanical engineering help

[Chevycrew]

I need to find out how much steel is needed.

12 inches long.

12 inches tall.

3 inches wide.

This is going to sit on top of a 3" wide rail and support 200,000lbs. (I have already calculated for the 2x safety factor.)


I'm thinking a chunk of 12"x3" box tubing, 12" long laying on top of the rail. What wall thickness would be needed? Do the ends need capped? What thickness on the cap? Or just skip it all and use a solid block?

or stacked boxes with plates sides and capped ends?


Looking for a strength versus weight versus available material. These do need moved by hand.


Thanks!

 

[dutchman]

Uniform load across the entire surface?

 

[Chevycrew]

Yes the load will be uniform.

 

[dutchman]

Are you using anything to prevent the 12" x 3" tubing from tipping over on the rail that it is sitting on?

 

[jeeper]

I had this girlfriend once... I'll see what they used for her chair legs, and get back to you..

 

[Chevycrew]

Its a secure load, the block will be sitting on a railroad rail, with legs dropping down the sides of the rail, and set bolts to clamp it in place.

I'm just curious how much steel is needed in the block to support 200,000lbs in a straight vertical load.

Actual lifting weight is approximately 100,000lbs.


Think of a 50 ton press as a test rig.

 

[BCGPER]

You need to talk to Maverick on here. Brett knows this stuff.


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[UFAB]

A36 steel

Usually around 36000 psi

To find the Ix load of the tubular cross section. Statics book would have it or a steel supplier detailer app or hand wheel.

I be surprised if someone engineered that over RME.



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