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Re: Bobcat S220 on existing 4" slab-on-grade

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Like all slab-on-grade capacities, it is very sensitive to the actual compaction and subgrade modulas of the base / sub-base.  If it is a good base below the slab the slab has a lot more capacity than an unknown subgrade.  If anyone actually inspected the subgrade during construction you are way ahead of most.

On 4/16/09, Haan, Scott M POA <Scott.M.Haan(--nospam--at)> wrote:
I am dealing with an existing 4" slab-on-grade where the building occupants
want to drive a Bobcat S220 skid steer loader on the floor which will
conservatively have a maximum axle load of around 10 kips. There will be very
intermittent traffic on the floor. I am trying to determine whether to tell
them to put a topping slab on the existing floor.

I checked the slab and think it will be ok for the loads with the PCA method.
My main concern is the control joints have one no. 3 through them every 36
inches on center and whether this could pose problems with movement between
the edges.

Any thoughts?

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