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Holdowns Sold per each Zinc Plated Gauge 10 Dimensions (inches): W 3" H 16-5/8" B 3-1/2" CL 1-3/8" SO 1-1/2" Fasteners: Anchor Bolt diameter
7/8" Wood Fasteners (20) 1/4" x 2-1/2" SDS Minimum Wood Member Size (inches) 3" x 3-1/2", 3-1/2" x 3-1/2", 3-1/2" x 4-1/2" HDU holdowns are pre-deflected during the manufacturing process, virtually eliminating deflection under load due to material stretch. They use Strong-Drive(R) SDS Heavy-Duty Connector screws which install easily, reduce fastener slip and provide a greater net section when compared to bolts. HDU Features: Uses Strong-Drive SDS Heavy-Duty Connector screws which install easily, reduce fastener slip and provide a greater net section area of the post compared to bolts No stud bolts to countersink at openings