The long specimens were tested only once due to the high costs and time required, whereas the shorter walls with corner framing were tested twice for each configuration.
Top plates of the corner framing were braced using 11mm-thick OSB sheets, fastened with 8d common nails (152mm o.
It is remarkable that except for the nails attaching the sheathing to the bottom plate, there were no typical damage signs of racking of the sheathing panels with corner framing.
6-m corner framing and the small sample size may also be contributing to the observed difference.
2-m corner framing, respectively, compared to a straight wall with no overturning restraint.
In these tests, corner framing provided some hold-down effect when compared to straight walls with no overturning restraint and no perpendicular walls attached.
Based on this observation, shear wall tests carried out in the future should always have corner framing to insure a more realistic performance.