Google is your friend.
Quick search of load rating definition came up with this.
http://www.tyrepower.com.au/tyre_load.aspxDifferent cars have different load ratings. Eg 89, 92, 95 etc
No specific information has been requested on the tyre by the OP.
I have for example liberty, Imprezza and Forester tyres.
All with different load ratings and different sizes....... Obviously with different rolling diameters.
Hope that helps.