A  20 in column supports the first elevated floor level in an intermediate moment frame. The unsupported length of the column is 10 ft. It is supported by a spread footing, and it is assumed that its base is pinned. The design spectral acceleration S has been determined to be 0.40, and the longitudinal reinforcement has been determined to be 12 bars, which are adequate for the governing load combinations . Determine the required transverse reinforcement along the height of the column assuming normal weight concrete with and Grade 60 reinforcement.