How to find thickness of steel plate

  • #1
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I have a 300 mm diameter hole in the ground surrounded by concrete. This hole will be covered by a steel plate. I need to get a machine of weight 2.5 tonnes across this hole safely without any bending of the steel plate.
How would i calculate the required thickness of the plate?
Thank you
Ron.
 

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  • #2
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The machine is on a skid? Rollers? Wheels? Casters? How is the load distributed?
 
  • #3
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It is a brokk, so it will be tracks. As the brokk may carry stones etc, im assuming a point load distribution for worst case scenairo.
Thank you
 
  • #4
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A Brokk. Down a one foot hole? You've got a copy of Machinery's Handbook handy? Look at diaphragm deflections in the strength of materials section. Pick what deflection you can live with and back out the plate thickness.
 
  • #5
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I dont have the handbook with me but i will have a look at it later when i go home. But thank you for your help and advice. :)
 

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