Simpson 6 x 6 Elevated Column Base ECB66The ECB elevated column base for hollow columns or solid sawn posts makes it easy to install waterproofing material on stacked balconies in multi family buildings. It's the only post base available off the shelf that features a 2" standoff, providing enough room for moisture barrier material and a thin finish surface while still allowing for the 1" code required standoff to prevent post decay. There are two model sizes for 6x6 and 8x8 posts. Model No.