Abstract: A strut support assembly for a partition system includes a retainer assembly projecting from beneath an upright and provided with a fastener receiving groove intermediate an enlarged medial section of the retainer assembly and the bottom of the upright. A removable strut assembly includes an arcuate attachment surface mating with the configuration of the upright exterior and a plurality of vertically spaced-apart horizontal cut-outs through the arcuate surface for the selective insertion of a U-bolt therethrough to captively engage the fastener receiving groove and rigidly attach the strut assembly relative the upright. The groove is of sufficient vertical extent to accommodate a second U-bolt for securing an additional oppositely disposed strut assembly to the same upright and the retainer assembly medial section includes an upwardly facing circular recess serving to receive and retain attachment structure carried by one or more panels of the partition system.