Applies To
	Product(s):	STAAD.Pro
	Version(s):	All
	Environment:	N/A
	Area:	Analysis Solutions
	Subarea:	Response Spectrum Analysis
	Original Author:	Bentley Technical Support Group

I am running an analysis and getting an error “Multiple Floor spectrum Generation block not allowed”. What does it mean?
It seems like multiple blocks of the generate floor spectrum command has been specified in the file. STAAD.Pro only allows one such block as shown next

GENERATE FLOOR SPECTRUM
…
END FLOOR SPECTRUM

One can have floor spectra reported for multiple floors and in various directions but all these have to be specified as part of the single generate floor spectrum command block. The Technical Reference Manual section 5.32.10.3 titled Floor Spectrum Response contains details on specifying the floor spectrum input.