JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. RR 21.03.00-4.2 Horizontal Brace Connection Design in Connection Design Connection Design is now capable of designing horizontal bracing connections to beam-beam-brace connections and column-beam-brace connections. Parent topic: RR 21.03.00-4 Features Affecting Post Processing Related tasksD. To design an HBBB connection D. To design an HCBB connection