12.4-4a Vertical Earthquake Calculation
Vertical earthquake effect is applied automatically using Equation 12.4-4a.
SDS = Short period design response spectrum acceleration coefficient
Ev = Vertical seismic load effect
D = Dead load effect
Vertical seismic load effect is determined with Eq. 12.4-4a except structures in seismic design category C, D, E, and F.
Information is included in the subtitle of loading status and loading combinations in the select report.