Hydrostatic Pressure to Increase Column Loads?

[msegerman]

Hi,

We're working on a project where we're way under the water table. We have a 24" pressure slab. The negative reaction at some columns is over 500 kips. Should this load be included in the column design? (The load in the columns is enough to counteract this)

Thanks,
Matt

 

[hokie66]

The uplift does not add to the column load. The column load comes from gravity. If the gravity load is less than the uplift, the structure will float.