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Structural systems

Structural systems

Structural systems

I'm designing 4pcs-4m long steel column using wide flange rested on a reinforced concrete slab 127mm thk. with 500mmx500mmx20mm thk. base plate. Is this possible to carry a certain load without cracking the outermost fiber of the slab due to axial load and bending on both direction?

RE: Structural systems

If you need a 500mmx500mmx20mm thk. base plate then I don't think a 127mm slab will be enough; not even for the anchor bolts.

RE: Structural systems

The other way of looking at this is that if you spread the load enough, it is supported by the subgrade rather than the slab.  With a base plate .25 m^2, and say a subgrade capacity of 100 kPa, you could load 25 kN onto the plate without expectation of distress in the slab.  I imagine with some types of mechanical platform, that might suffice.

RE: Structural systems

My comment assumed a ground supported slab, which on second reading may not be the case.

RE: Structural systems

Obviously, further clarification is needed to answer the question.

Mike McCann
MMC Engineering
Motto:  KISS
Motivation:  Don't ask

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