Table4. Additional Seismic Action Coefficient δn


Reinforced Multistory Concrete Building

Multistory Inner-framed Brick Building

Other Building

Tg (sec)

T1 >1.4Tg

T1  ≤ 1.4Tg

0.2

No need to consider

≤ 0.35

0.08T1  + 0.07

No need to

consider

 <0.35-0.55

0.08T1  + 0.01

≥ 0.55

0.08T1  - 0.02

Note: T1 is the fundamental period of the structure