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Section 5
5-165
d)
A revised SPRING TENSION / COMPRESSION
command and its accompanying list of joints may be
provided after a CHANGE command. If entered, the new
SPRING commands replace all prior SPRING commands.
If not entered after a CHANGE, then the previous spring
definitions are used.
e)
The SPRING TENSION command should not be used if
the following load cases are present : Response Spectrum
load case, Time History Load case, Moving Load case. If
used, the SPRING TENSION /COMPRESSION will be
ignored in all load cases.
f)
If the SPRING TENSION/COMPRESSION command is
used in a model with UBC, IBC or other such seismic load
cases, each such load case must be followed by an
ANALYSIS and CHANGE command.