Warehouse floor slab thickness 1

[CardsFan1]

What thickness of warehouse slabs are you engineers out there using? I am just looking for a gut check, not an in depth discussion on the "art" of industrial floor slab design.

I am designing a floor slab to support a 20 kip axle load. I have used the the tired and true PCA alignment charts method and determined a slab thickness of 7". I ran the same analysis in RISA Foundation and found that I can use a 5" thick slab.
It is a large slab, so the thickness has a large impact on quantity.

 

[hokie66]

If it is a supported (suspended) structural slab on drilled piers, it should not be saw cut. But it should have structural flexural reinforcement, not just minimal shrinkage reinforcement. Because of restraint from the earth and the piers, that reinforcement may be greater than required for bending in order to control crack width.

 

[ldeem]

Don't forget to thicken the edges.