Table 2: Rotation capacities for coupling beams controlled by shear as per FEMA 273 [14] and FEMA 356 [15].

Type of coupling beamConditionsPlastic Rotation Capacity (Radians)
IOLSCP

Conventional longitudinal reinforcement with conforming transverse reinforcement
30.0060.0120.015
60.0040.0080.010
Conventional longitudinal reinforcement with non-conforming transverse reinforcement 30.0060.0080.010
60.0040.0060.007
Shear dominant steel coupling beam0.0050.110.14