Applies To
	Product(s):	STAAD.Pro
	Version(s):	ALL
	Environment:	ALL
	Area:	Analysis Solutions
	Subarea:	Miscellaneous Analysis Solutions
	Original Author:	Sye Chakraborty, Bentley Technical Support Group

While analyzing a STAAD.Pro model I get a warning message

  ** WARNING ** A SOFT MATERIAL WITH (1.0 / 1.526E+01) TIMES THE STIFFNESS OF
                CONCRETE ENTERED. PLEASE CHECK.

What does it mean ?

During analysis STAAD.Pro checks whether the E value for the defined material varies widely from the E values for standard materials like Concrete or Steel and generates such warnings when it is so. The intention is to make the user aware of such discrepancies in case it is caused by error in input. Typically such warnings may be generated when the values used for the E are inconsistent with the units. For example E for concrete cannot be 3150 if input unit is pound inches. Similarly E for concrete cannot be 29000 if the input unit is in Kip-ft. So it is important to check for such inconsistencies when warnings like these are encountered.

Sometimes users intentionally define stiff or soft materials and assign these to members/elements to model certain structural entities/connections/boundary conditions in which case such warnings would also be generated but in such cases these may be ignored.