What Is Weak Story

This irregularity refers to the existence of a building floor presenting a lower lateral structural resistance than the immediate superior floor or the rest of the floors of the building.

What is weak and soft story?

weak storey is defined as one in which the storey’s lateral strength is less than 80 percent of that in the storey above. … A soft storey is one in which late al stiffness is less than 70% of that in the storey immediately above, or less than 80% of the combined stiffness of the three stories above.

How do you stop a soft story?

In case it is necessary, irregularities can be eliminated by increasing the lateral rigidity of this storey by putting up additional walls between single structural elements on the soft storey; placing diagonals between the columns and shear walls; increasing the rigidity of the soft storey by increasing beam-column …