Simpson Strong-Tie Holdown HDU4-SDS 2.5

The Simpson Strong-Tie HDU4-SDS 2.5 is a heavy-duty, predeflected holdown designed for shear-walls, braced-wall panels and other lateral-load applications in wood construction. Its factory-predeflected body virtually eliminates in-service deflection due to material stretch, while the included Strong-Drive® SDS screws install quickly, reduce fastener slip and preserve more of the post’s net section compared to conventional bolts.

Crafted from 14-gauge galvanized steel, this holdown delivers outstanding corrosion resistance and long-term performance. It’s engineered for faster installation—no stud bolts to countersink, no additional washers required—and comes complete with the optimal fasteners to meet design requirements.

Key Features

• Predeflected body virtually eliminates deflection under load
• Uses Strong-Drive® SDS Heavy-Duty Connector screws for easy installation and reduced slip
• Includes (10) 1/4″ × 2 1/2″ SDS screws—ensures proper fasteners are used
• No stud bolts to countersink at openings; no extra washers needed
• Durable 14-gauge galvanized steel for corrosion resistance
• Ideal for use in shearwalls, braced-wall panels and other lateral applications

⚠️ WARNING: This product can expose you to Tetrabromobisphenol A known to the State of California to cause cancer and Epichlorohydrin known to cause birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.