Pallet Rack Add-On Unit 9' x 4.0' x 16' Heavy Duty with 5" Beam

5,470 Lbs. capacity per level. 9' x 4.0' Add-On units come with one pre-assembled upright and 4 beams. Regular Duty and Heavy Duty add-on pallet rack now features 3" x 3" columns and 5" x 8" seismic base plates. The heavy duty uprights feature a 23,300 lbs. capacity and are constructed from 14 gauge steel (capacity is based upon a maximum shelf spacing of 36").