In Seismic Design Category B, what is the maximum distance from the end of a braced wall line where braced wall panels shall begin?

In Seismic Design Category B, the building code specifies that braced wall panels must begin within a maximum distance of 12 feet from the ends of a braced wall line. This requirement is fundamental for ensuring adequate lateral stability of structures during seismic events.

The reason for this 12-foot limit is to maintain structural integrity and distribute seismic forces effectively. Starting braced wall panels too far from the ends of the wall line could lead to inadequate stiffness and strength against lateral loads, which might result in structural failure during an earthquake.

By establishing this distance, the code ensures that there is sufficient structural support near the extremities of the walls, allowing for a more uniform distribution of forces throughout the wall system. This measure is crucial in regions assessed as having moderate seismic risk, such as those classified under Seismic Design Category B.