asce7-05 redundancy factor

huangyhg

asce7-05 redundancy factor
i am looking for opinions on what the appropriate redundancy factor would be for a tank supported by six legs with cross bracing.  the seismic design category for the location is d.  this would be a nonbuilding structure and in section 15.6 this factor is allowed to be taken as 1.0.  
my question comes from the language used in this section.  it states that nonbuilding structures that do not have lateral and vertical seismic force resisting systems that are similar to buildings shall be designed in accordance....
now would the cross braced legs on the vessel be considered similar to a building and require the larger value of 1.3 to be used or since the legs are integral with the tank can 1.0 be used?