Every BVTS is constructed of 20 gauge (1.01 mm [0.04"] thick) sheet metal conforming to ASTM Standard A570. Three 6 mm (0.24") diameter holes are provided to facilitate the attachment of a corrugated strip tie or an adjustable masonry tie. BVTS heights of 21 (0.83"), 31(1.22"), 40 (1.57"), 52 (2.0"), 65 (2.56") and 78 mm (3.07") are available. Figure 1 illustrates the physical dimensions of the available BVTS. BVTS are available in hot dipped galvanized finish (conforming to the CSA CAN3-A370-04 and ASTM A153 requirement of 458 g/m^2/side [1.5 oz/ft^2/side] of zinc coating).