Applies To
	Product(s):	STAAD.Pro
	Version(s):	ALL
	Environment:	ALL
	Area:	Design
	Subarea:	Concrete Design Is13920
	Original Author:	Abhisek Mandal, Bentley Technical Support Group

 

While designing the columns as per IS13920-2016 columns has not designed and STAAD states that, *** WARNING: RATIO OF SMALLER DIMENSION TO LARGER DIMENSION OF COLUMN #  *** SHALL NOT BE LESS THAN 0.4.

 

Can you please explain what is the reason behind the message and how can I get rid of it ?

 

As per clause 7.1.2 vertical RC columns should have cross sectional ratio (i.e. smaller dimension to larger dimension ratio) less than 0.4. As in your case some of the columns are not maintaining that ratio, program checks and report the same through warnings with corresponding column numbers. To avoid this warning you should provide the dimensions of the column in such a way so that the ratio is maintained.