Composite stage (Composite beams: AISC 360) Tekla Structural Designer performs all checks for the composite stage condition in accordance with Section I3 unless specifically noted otherwise. Equivalent steel section (Composite beams: AISC 360) Shear strength - I3.1b (360-05), I4.2 (360-10 and 360-16), I4.3 (360-22) (Composite beams: AISC 360) Strength of composite beams with shear connectors - I3.2 (Composite beams: AISC 360) Shear connectors (Composite beams: AISC 360) See alsoServiceability limit state (SLS) (Composite beams: AISC 360)