DOES STAAD CALCULATE SEISMIC FORCE IN VERTICAL DIRECTION (OTHER THAN TWO HORIZONTAL DIRECTIONAL LOAD) FOR THE EFFECT OT OF 3 DIRECTIONAL EARTHQUAKE GROUND SHAKING EFFECTS, TO BE CONSIDER AS REQUIRED BY CLAUSE - 6.3.3 OF IS 1893(PART1):2016

As per revised  I S 1893 ( part 1) : 2016  clause 6.33  it is required to  consider all three direction   X Y & Z seismic force combination

how  these three seismic forces in  X ,Y & Z directions separately can be calculate  in staad.