STIFFNESS MODIFIERS According to IS 16700-2017- Clause no. 7.2 table no.6, UBC-97 Clause 1910.11.1 and ACI 318-19 Clause no. 6.6.3.1.1 table no.6.6.3.1.1 (a) and (b). The Stiffness Modifier values are given.   1. WHY STIFFNESS MODIFIER IS NEEDED FOR CONCRETE FRAME SYSTEM? Concrete has an inherent property of losing itself stiffness…