Braced Direction In Section Design
In Wall Section Design, wall will be following based on local axis system. Regardless of which direction of wall modelled in plan view/3D view, the major direction will always be presented horizontally.
In Wall Section Design > Slenderness, the direction of Bracing will be automatically braced at Dir-2 which is the minor direction.
In comparison of Global Axis System and Local Axis System for Wall only
Please refer to below snapshot for the comparison.