• The Strength Excess Coefficient, D defined in Table 4.1 for the relevant structural system , is automatically applied to the reduced internal forces acting in the plane of the building stories.


D = Strength Redundancy Coefficient
R = Structural System Behavior Coefficient

The Strength Excess Coefficient D is applied in the slab design of the buildings, in the slab stress controls , in the seismic load to be transferred from the slab to the curtain in a strong direction and in the punching calculation.

Design of Plates