If the corner walls from both directions are used as shear walls, can we use one hold-down for one direction only?

Yes. WFCM Section allows a single hold-down to be used to resist overturning forces in both directions where full height shear wall segments meet at a corner, provided the corner framing in the adjoining walls is adequately fastened to transfer the load.

The following FAQ is based on the presentation of STD312 - Part 3 of the 2012 WFCM Webinar Series: Connections.