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SDPWS 4.3.6.1.2 and Equation 4.3-8, require that tension and compression design forces in the shear wall end chords be factored by the reciprocal of the adjustment factor Co. SDPWS 4.3.6.4.2 requires that this force be used for hold-down force calculations, so the overturning hold-down force T based on shear line force force is
T = Vh/ COSLi
SLi is the sum of the shear wall segments, adjusting for narrow segments as per 4.3.4.3.
Neglecting hold-down offsets and narrow segment adjustments, this becomes
T = v * h / Co
where v is the unit design shear force.
Note that this provision also indicates that the wall height is to be used and the hold down offset is not to be subtracted, but these can be over-ridden by the Hold-down settings,.
For hold-down forces calculated with tabulated shear capacity vr, dividing by Co has the effect of using the shear strength unadjusted by Co, so that
T = vr * h
also neglecting offsets and adjustments.