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

 

How can I find out the CG of my structure ?

 

You can use the command PRINT CG in your input command file as shown below

…

PERFORM ANALYSIS PRINT STATICS CHECK

PRINT CG

…

The software would then calculate the CG based on the selfweight of the structure. It must be clearly understood that imposed loads like joint loads, member loads, floor loads etc. are not included in the CG calculation. The section Technical Reference of STAAD Commands > TR.42 Print Specifications of STAAD.Pro Help contains details on this command.

 

If one needs to calculate the CG for part of the structure, one has to define a member group consisting of the structural elements belonging to that part and then use the command below

 

PRINT CG (_group_name)

 

The software prints the CG as part of the analysis output file (Utilities >Analysis Output) as shown next

 

 

If one needs to include the imposed loads as part of the CG calculation ( for example, if one needs to include some heavy equipment sitting on the structure ), one has to define the self weight and all imposed loads in global Y as part of a primary load case. Subsequently one should use PERFORM ANALYSIS PRINT STATICS CHECK command and then the center of force for that primary load case will be printed in the analysis output file as shown below