Wall ties anchor a single-deep row of pallet rack to a nearby wall, stabilizing the rack system to prevent tipping and also ensuring adequate flue space behind the pallet rack for fire suppression systems to operate effectively. This 8" wall tie bolts to the back of the rack and anchors to the wall with included hardware. While you may use wall ties with any height pallet rack, they are most strongly recommended when rack height-to-depth ratio is 6:1 or greater. Order at least two ties per upright.