36 Anchors PHD Predeflected Holdown HDQ8 Holdown ... Dia. No. of Simpson SDS x3 Wood Screws PHD2-SDS3 14 3 9 2 1 10 3375 .063 PHD5-SDS3 ... 14 3 11 2 1 14 4380 .077 PHD6-SDS3 12 3 13 2 1 18 5480 .068 PHD8-SDS3 ... drill with a hex head driver. Vertical PHD Installation (shown flush , touching ... 20 7. SDS x3 screws are required for PHDs and HDQ8s. See T-HDLA for loads using ... Tabulated loads may be doubled when the PHD or HDQ8 are installed on both sides of ... with no increase in deflection values. PHD5 (others similar) US Patent 5,979,130 ... be required. The Predeflected Holdown (PHD) and HDQ8 are revolutionary ... Predeflected during manufacturing, the PHD virtually eliminates deflection from ... . See General Notes. Place the PHD or HDQ8 over the anchor bolt. HDQ8: of ...