Educational content reviewedGeneral engineering principles; project application still requires the applicable official standards.
RC framesStructural wallsDual systemsCritical regionsFoundation interfaces
Learning objectives
In this lesson
- System choice determines demand paths.
- Dual-system interaction must be demonstrated.
Engineering explanation
Moment frames provide deformation capacity through member and joint behaviour. Walls provide stiffness and strength but concentrate demand near bases, boundaries, openings and coupling regions. Dual systems require verified interaction and force sharing. Critical regions are locations where cyclic curvature, shear, bond or confinement demand may concentrate; they must remain consistent across analysis assumptions, reinforcement design, drawings, construction sequencing and inspection.
Key takeaways
What to carry forward
- System choice determines demand paths.
- Dual-system interaction must be demonstrated.
- Coordinate mechanisms with foundation interfaces.