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Re: material deflection question

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Posted By<" ">Cragyon on December 07, 2001 at 07:50:20:

In Reply to: material deflection question posted byD Nielsen on December 06, 2001 at 22:31:31:

: Hi,

: I am trying to figure out which material is the most economical to use in a home design project. I am full
: of "good ideas" and lots of ambition but lack techical expertise. My question is how thick of plate do I
: need to withstand 120 tons of force evenly distibuted over 126 inches and supported at each end. The plate
: is mild steel 24" wide X 126" long standing on edge. Or what size of I beam or H beam would I need to withstand
: the same force at the same distance same supporting? I need the material to have the very minimum of deflection
: at the center point (ie in the small thousandths of an inch).

: Thank You for your time and effort
: Doug Nielsen

I would use the Beam Stress calculator here on Engineers Edge to experiment with material and section properties to see what is appropriate for your application. Sounds like you are asking for quite a bit with small thousands of an inch deflection. My quick calculation using a 10" beam with a section modulus of 50 showed a deflection of .5 inches.

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