Static Resistance 1

[hawkaz]

I have a client who is purchasing an existing building. He needs the slab on grade analyzed to determine if it has enough "static resistance" to support 1T/m^2

I am not familiar with the term static resistance in this regard- but it sounds like the slab allowable load- Does anyone have any further insight into this phrase?

Thanks

 

[CTW]

Ask the client what "static resistance" means.

 

[hokie66]

Ask him if he means allowable load. Sounds like he just doesn't know the lingo. Instead of 1T/m^2, the loading should be expressed as 10 kPa, and any competent slab on grade should be able to support that. But there is a lot more to assessing the performance of a slab on grade than its gravity load carrying capacity. You should be looking at the joints and cracks.

 

[Den32]

Like hokie said, the slab joints and surface condition may be more of an issue if they will be running forklift traffic on this slab.

Also, how do you anticipate analyzing the existing slab? Do you have record drawings? Just because you know the slab thickness and design subgrade reaction, who knows how the contractor compacted the subgrade, or if there are settlement or other soil issues hidden beneath the slab (do you have a record Geo Report), etc? Plus, don't count on reinforcing if WWF -> most likely it is sitting on (or punched thru) the vapor barrier (if there is one)

If it is that critical, may be worth taking a core through the slab, and even extending down into the subgrade and soils. Or, note the unkowns you are dealing with in your analysis to CYA