Hello Ramesh,
What ever you read or what ever you here, there should be some logic behind that. Unless and until you get the answer, why it is a fault at first place, pls do not beleive it.
In Todays world most of the apartments are constructed on RCC colums, so in that case all those first floors should be defective. This is not possible, if this is true then engineering fails
:-) If still this does not satisfy you, please eloborate and this forum will try to help you further.
Regards.
Pavan Matkar