Slab on grade design 2

[cl220]

I am looking to design a slab on grade as a standard (non site specific) foundation. Does anyone have a good rule of thumb to use when little info is known?

 

[hokie66]

keenaseng,
I don't know about official, but it is how I remember it being taught in my one airport engineering class. The principal was that central areas of the runway, and I don't remember how much, could be designed for 75% of the loading seen by the ends and taxiways. I have never been involved in the design of airfield pavements, so don't know if they are actually built that way today or not.

 

[keenaseng]

Thanks Ron and Hokie66 - Interesting stuff.
I have felt the resonant quality you mentioned before whilst taxiing around and also noticed it by the deflection (or 'bouncing') of the wings. There would be a substantial saving in designing the central areas to 75% of loading due to the large area of a typical runway.

 

[dik]

I've done a bunch of 747 pavements, and there are some aircraft wheel configurations that will exceed 747's...

The Portland Cement Assoc. used to have a very good text on Aircraft pavements and I still use their airport program for designing slabs (mostly for rack loading).

Dik

 

[Ron]

dik...for many years we analyzed pavements based on 727 loading, which I believe is higher than 747, because of the landing gear configuration.

hokie66...that is the keel section and you are correct.

 

[haynewp]

Check out PCASE to design pavements for aircraft loading.