Slab on grade with linear loading

[SilverBeam75]

Hi,

I have an existing 6 inch slab on grade. I want to know if it can support a linear loading. The equipment that I have to support sit on a steel "W" beam width of 5 inch. The load carried to the slab is 25 kip /ft.

How do you evaluate if the slab can carry such load ?

Thank you for helping

 

[ToadJones]

BOEF

 

[spats]

Good Lord! No way a 6" SOG can support 25 kips/ft. You're wasting your time.

 

[ToadJones]

You may analyze it by tearing out the slab and putting in a proper equipment foundation.

 

[Ron]

As others have noted...you're not even close.

Factored shear resistance will be in the range of 50 to 70 psi, for a typical 3000 to 4000 psi in-place strength of concrete. Considering two shear planes of 144 square inches total, you might get as much as 10k/ft...but don't count on it....the thickness varies as does the strength.

 

[Ron]

Oops...hit the button too fast....


That's neglecting bending in the perpendicular direction, which will likely yield even less resistance.

As TJ noted...put a foundation under it.

 

[ToadJones]

If this equipment has moving parts, you'll need a proper foundation anyway or you also run the risk of voiding warranties and destroying the equipment.

 

[MiketheEngineer]

Sure it will work - but will be accelerating across the field until it hits something really big!!!