Applies To
	Product(s):	STAAD Advanced Concrete Design
	Version(s):	Connect Edition
	Environment:
	Area:	Concrete Design
	Subarea:	Beam Design
	Original Author:	Aaradhya Rahate, Bentley Technical Support Group

Does STAAD advanced concrete design (RCDC) consider the contributing effects of the slab flanges in RC beam design? I examined the calculation report for some beams and realized  the beams are designed completely as rectangular beams even when you specify them as flange beams.

Reply;

RCDC can design beams with flanged action (T or L). As per design principles of flanged beam, RCDC uses this action only for mid-span bottom reinforcement.

Effective width of flange-action is calculated as per the provisions in code for simply-supported and continuous beams.

Below snip shows difference where same Beam is designed with Flanged action and without Flanged action, using Indian Code as an example.