Simpson Strong Tie CPT44Z ZMAX Galvanized 4 x 4 Concealed Post Base The 1 in. standoff height is code-required when supporting permanent structures that are exposed to weather or water splash, or in basements The standoff reduces the potential for decay at post or column ends The anchorage for the CPTZ can be either cast-in-place or retrofit with adhesive or mechanical anchors Post Size: 4 in. x 4 in