What is required for the connection of blocking in top plate connections of braced wall panels?

The correct choice highlights the essential requirement for effectively connecting blocking in top plate connections of braced wall panels. Connecting the blocking directly to the braced wall line top plate is critical for ensuring structural integrity. This connection helps transfer lateral loads, such as those from wind or seismic activity, more efficiently throughout the wall system.

By fastening the blocking to the top plate, it creates a solid and continuous path for load transfer, thereby enhancing the overall stability of the wall panels. This is particularly important in braced walls, which are designed to resist forces that may cause lateral movement.

In contrast, other options may not fulfill the structural requirements necessary for effective bracing. For instance, the connection to the bottom plate or to floor joists does not address the specific need for direct load transfer on the top plate where lateral forces are most concentrated. Similarly, securing with screws only does not meet the broader criteria outlined by construction codes, which generally specify the use of appropriate fastening methods, such as nails or a combination of nails and screws, to ensure a robust connection.