This detail illustrates the connection of a portal frame assembly to a rigid frame column. Portal frames are used to transfer lateral loads (such as wind or seismic forces) when cross-bracing cannot be installed due to door openings or other obstructions in the sidewall.
The portal frame consists of two main components: the portal rafter (horizontal member) and the portal column (vertical member), which form a rigid moment-resisting frame. The portal frame boss (BC-49) serves as the connection point for the portal frame. This boss provides a bolted connection surface that allows for field assembly.
The rigid frame connects to the portal frame boss at the the top of the portal column. For bolt quantity, diameter, and type at these connections, refer to the sidewall drawing specific to your building. The hardware requirements will vary based on the building's engineering loads and portal frame size.
During installation, ensure the portal column is properly aligned with the rigid frame column before tightening all bolted connections. The portal frame must be fully secured to function as an effective lateral load-resisting system.
