NBC 2020 Stabilitätsfaktor

The stability factor (θ_x) at level x

θ_{x} = \frac{\sum_{i = x}^{n} W_{i}}{R_{o} \sum_{i = x}^{n} F_{i}} \frac{∆_{mx}}{h_{s}}

#formula@001475#	Portion of the factored dead plus live load at level x
#formula@001476#	Sum of the design lateral seismic forces acting at or above level x
R_o	Overstrength-related modification factor
Δ_mx	Max inelastic interstory deflection
h_s	Interstory height