Yes ( I am assuming that your question pertains to clients associating to a root bridge).
http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag/air/ap3xx/SetExpress.shm.htm
Root Bridge -- One bridge in each group of bridges must be set as the root bridge. A root bridge can only communicate with non-root bridges and other client devices and cannot associate with another root bridge. Use the Bridge Spacing setting to enter the distance between the root bridge and the non-root bridges with which it communicates.
