In shearwalls, the sum of the shear forces arising from earthquake loads at each story level is automatically compared with shear forces occurring at the story from earthquake loads.
According to ACSE 7-16 12.2.5.8, the shear strength of the shear walls should be at least 75% of the design story shear at each story. The frames of the shear wall–frame interactive system should be capable of resisting at least 25% of the design story shear in every story.