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STAAD Commands and Input Instructions
Section 5
5-216
f6 = Optional Period of structure (in sec) in X-direction to be used
as fundamental period of the structure instead of the value
calculated by the program using Raleigh-Quotient method
f7 = Optional Period of structure (in sec) in Z or Y direction to be
used as fundamental period of the structure instead of the
value calculated by the program using Raleigh-Quotient
method
General format to provide NTC Seismic load in any load case:
LOAD i
NTC LOAD {X/Y/Z} (f)
where i and f are the load case number and factor to multiply
horizontal seismic load respectively.
Examples
UNIT KGS METER
DEFINE NTC LOAD
ZONE 2 QX .5 QZ 0.9 GROUP B
SELFWEIGHT
ELEMENT WEIGHT
1577 TO 1619 PRESSURE 275
LOAD 1 ( SEISMIC LOAD IN X DIRECTION )
NTC LOAD X 1.0
LOAD 2 ( SEISMIC LOAD IN Z DIRECTION )
NTC LOAD Z 1.0