code: def set_beam_prop(self, prop, values, repeat="up"):
          
          values = np.array(values)
          if repeat == "up":
              assert len(values.shape) == 1
              values = [values for ss in range(self.n_storeys)]
          else:
              assert len(values.shape) == 2
          if len(values[0]) != self.n_bays:
              raise ModelError("beam depths does not match number of bays (%i)." % self.n_bays)
          for ss in range(self.n_storeys):
              for i in range(self.n_bays):
                  self._beams[ss][i].set_section_prop(prop, values[0][i])
docs: Specify the properties of the beams
  
          :param values:
          :param repeat: if 'up' then duplicate up the structure
          :return: