Refer to the exhibit.

The diagrams depict metal stud or curtain wall connections to structural frames under wind loading. Diagonal bracing can be eliminated when the connection itself provides lateral restraint in both directions.

A: Shows a connection with angles or plates attached to resist both in-plane and out-of-plane forces, creating a moment-resisting connection that can handle wind loads without diagonal bracing.

B, C, D: These connections allow slip or have limited fixity—requiring separate bracing to resist lateral loads.

PDD Reference: ARE 5.0 PDD “Structural Systems—Lateral load resistance in curtain wall and stud framing connections”; AISC Steel Design Guide for cladding attachment; Curtain wall engineering details.