Applies To
	Product(s):	STAAD Foundation Advanced
	Version(s):	ALL
	Environment:	ALL
	Area:	Design
	Subarea:	Steel Design, AISC
	Original Author:	Sye Chakraborty, Bentley Technical Support Group

 

Can you tell me the basic difference between AISC 9^th edition and AISC 360 codes ? Which one should I use ?

 

The most significant difference between AISC 9^th edition and AISC 360-05/AISC 360-10 specification is that the former follows a stress based approch whereas the later follows a strength based approach. The former calculates allowable member stresses and the later calculates allowable/design member strengths. The AISC 9^th edition is purely ASD but the AISC 360-05/10 supports design as per both ASD and LRFD. Whereas a first order analysis is fine for AISC 9^th edition, AISC 360-05/10 has much more stringent stability requirements and promotes a new type of second order analysis called DIRECT ANALYSIS, although others forms of second order analysis/first order analysis are permiteed under certain scenarios. These are some of the basic differences. You should refer to the individual codes for more details. As far as the choice of code for a project is concerned, the project specifications should govern which code you should use.