Simpson Strong-Tie PB Post Base. Pack of 8 of Simpson Strong-Tie PB Post Base. The PB base embeds in wet concrete after pour and is made to install flush with the concrete surface. This connector was designed to help resist upload forces. Holes are provided for installation with 16d commons. A 2" minimum side cover is required to obtain the full load. Post bases do not provide adequate resistance to prevent members from rotating about the base and therefore are not recommended for non top-supported installations (such as fences or carports). 12-gauge galvanized steel. Some sizes available with ZMAX coating. No. PB44: Size: 4 In. x 4 In., Gauge: 12 ga, Finish: Galvanized, Material: Steel, Dimensions: 3-9/16 In. W x 3-1/4 In. L, Type: PB Base, Install With: 16d Fasteners, Uplift: 850 Lb., Download: 12685 Lb., Pkg Qty: 1 No. PB44Z: Size: 4 In. x 4 In., Gauge: 12 ga, Finish: Z-Max, Material: Steel, Dimensions: 3-9/16 In. x 3-1/4 In., Type: PB Base, Install With: 16d Fasteners, Uplift: 850 Lb., Download: 12685 Lb., Pkg Qty: 1 No. PB66Z: Size: 6 In. x 6 In., Gauge: 12 ga, Finish: Z-Max, Material: Steel, Dimensions: 5-1/2 In. W x 5-1/4 In. L, Type: PB Base, Install With: 1/2" bolts, Uplift: 850 Lb., Download: 25270 Lb., Pkg Qty: 1 No. PB46: Size: 4 In. x 6 In., Gauge: 12 ga, Finish: Galvanized, Material: Steel, Dimensions: 5-1/2 In. W x 3-1/4 In. L, Type: PB Base, Install With: 16d Fasteners, Uplift: 850 Lb., Download: 22445 Lb., Pkg Qty: 1 No. PB66: Size: 6 In. x 6 In., Gauge: 12 ga, Finish: Galvanized, Material: Steel, Dimensions: 5-1/2 In. W x 5-1/4 In. L, Type: PB Base, Install With: 16d Fasteners, Uplift: 850 Lb., Download: 25270 Lb., Pkg Qty: 1 WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. This listing is for a pack of 8. WARNING: California Prop 65 - www.P65Warnings.ca.gov.