ideYAPI BIM Knowledgebase Structural Engineering International Design Codes ANSI/AISC 341-16 Steel Design Concentrically Braced Frames (CBF) F2-Special Concentrically Braced Frames (SCBF) Concentracialy Brace Frames Requirements Current: Slenderness Ratio Report for SCBF Slenderness Ratio Report for SCBF The slenderness ratio is checked and reported automatically by the programme. Braces must have a slenderness ratio of KL / r ≤ 200. ×