For light frame applications I consider the 2.8 factor omega to be applied
to the T/C forces due to the rotation of the shearwall based upon the
demand to the system, not the capacity of the shearwall. Connections
detailing the restraint and beams supporting the system are designed
considering 2.8T/C. Sill nailing to service lateral shear are not subject
to the omega factor increase as this single-degree force is a prime factor
for the calculation of panel rotation.