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

Please find attached a file, which is the model with the Euro Spectrum. In the box “Design Ground Acceleration” I put 0.075 which is the ag value. Question: Is this value the correct value to input in this box or it should multiplied by g = 9.81m/sec2 ?

 In STAAD Eurocode 8:2004 implementation, if you have specified 0.075 in the box designated to specify the Design Ground Acceleration, the engine takes that value as 0.075g for calculations. It automatically multiplies that value with the acceleration due to gravity.