Need more length for your perimeter wall? Start with our 20' Perimeter Wall and add these 10' extension assemblies until you achieve your desired length. These assemblies can only be purchased as an add-on to our ByBlock Perimeter Wall products. Choose between 4' or 6' heights in ByBlock only or opt for full assembly kit. Available for pickup or freight. Lead time 4-6 weeks. KIT INCLUDES: All required ByBlock (General Construction Grade). Hardware bundle includes hardware and fastener pack. Available in zinc, galvanized, drop-in anchors, or epoxy for slabs (minimum 4" depth into the slab/footer, per standard practice for a 5/8" diameter rod). Assembly instructions including ByBlock installation process and respective anchoring methods. They are not to be considered approved plans/drawings. Consult with a local structural engineer for slab requirements, wind loads, wall height restrictions, etc. Contact us with questions. ENVIRONMENTAL IMPACT: 4' Wall Height: Landfill Diversion: 0.53 tons CO2 Avoidance: 0.79 tons 6' Wall Height: Landfill Diversion: 1.17 tons CO2 Avoidance: 1.75 tons NOMINAL DIMENSIONS: Wall Heights: 4' = 4' 2-1/2", 6' = 6' 2-1/4" (include 3" for lumber top plates and post-tension) Wall Lengths: 10' = 9' 8-1/4"