Simpson Strong-Tie HDUE9-SDS3.5 HDUE™ 17-3/8 in. Galvanized Predeflected Holdown with Strong-Drive® SDS Screws

The Simpson Strong-Tie® HDUE™ holdown delivers exceptional strength and reliability for securing shearwalls, braced wall panels and other lateral-force-resisting applications in wood construction. It features a predeflected seat that reduces deflection under load, an overlapping back plate for increased strength and optimized screw patterns to prevent splitting, ensuring superior performance. Installation is fast and efficient with Simpson Strong-Tie Strong‑Drive® SDS Heavy‑Duty Connector screws, making it a dependable choice for modern residential construction.

This Simpson product is designed for construction, connector, fastening, anchoring, and structural applications where dependable performance, durability, and jobsite-ready installation matter.

Features

• Predeflected seat reduces deflection under load
• Angled fastening engages the screws in tension for higher load capacity, reducing the number of screws required
• Angled fastening tabs help drive the fastener at a 45° angle, and offset holes on the second back plate block the fastener from being driven straight
• Overlapping back plate increases fastener strength and shear values, helping prevent post splitting
• Optimized screw patterns reduce splitting at the end of the post and maximize individual fastener capacity
• Extruded seat adds a greater cross-sectional steel section for added strength
• Teardrop holes allow higher and more even distribution of load
• Height: 17-3/8 in.
• Made from 12-gauge steel; galvanized (G90) for corrosion resistance

Specifications

• ERP Part Number: HDUE9-SDS3.5
• UPC: 707392032014
• GTIN: 707392032014
• Feature 01: Predeflected seat reduces deflection under load
• Feature 02: Angled fastening engages the screws in tension for higher load capacity, reducing the number of screws required
• Feature 03: Angled fastening tabs help drive the fastener at a 45° angle, and offset holes on the second back plate block the fastener from being driven straight
• Feature 04: Overlapping back plate increases fastener strength and shear values, helping prevent post splitting
• Feature 05: Optimized screw patterns reduce splitting at the end of the post and maximize individual fastener capacity
• Feature 06: Extruded seat adds a greater cross-sectional steel section for added strength
• Feature 07: Teardrop holes allow higher and more even distribution of load
• Feature 08: Height: 17-3/8 in.
• Feature 09: Made from 12-gauge steel; galvanized (G90) for corrosion resistance
• Install With: Install with 7/8 in. anchor bolt and (16) 1/4 in. x 3-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws (included)
• Assembled Depth - Imperial: 4.25525
• Assembled Depth UOM - Imperial: in.
• Assembled Height - Imperial: 17.50525
• Assembled Height UOM - Imperial: in.
• Assembled Width - Imperial: 2.948
• Assembled Width UOM - Imperial: in.
• Base Product ID: HDUE_Holdown
• Base Product Name: HDUE™
• Brand Name: Simpson Strong-Tie®
• Category Tree (Computed): Wood Construction Connectors > Holdowns and Tension Ties > Holdown
• Coating: Zinc Galvanized, G90
• Country of Origin: US
• Customer Unit: Yes
• Display Unit/Measure: EA
• Finish: Zinc Galvanized, G90
• Gauge: 12
• GUID: 162977300583079075879871128492130809279
• Logo Image: https://images.salsify.com/image/upload/s--Lkh4Jm6c--/vkrqlmpfxgflsa4yytuq.png
• Measurement Unit Text: each
• MFG Name: Simpson Strong-Tie®
• Number Category Description: UPC
• Packaging Quantity: 1
• Packaging Type: Unpacked
• Product Class: Holdown
• Product Includes: (16) 1/4 in. x 3-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer
• Prop 65 - Cancer: Wood Dust
• Prop 65 - Long Text: WARNING! This product can expose you to chemicals including wood dust which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov
• Prop 65 - Short Text: WARNING! Cancer - www.P65Warnings.ca.gov
• Prop 65 Warning: Yes
• Quantity: 1
• Shipping Weight: 6.102
• Short Product Name: 17-5/16IN PREDEFLECTED HOLDOWN W/SCREWS
• Strongtie.com URL: https://www.strongtie.com/sdsscrewholdowns_holdowns/hdue_holdown/p/hdue
• Subcategory: Wood Construction Connectors
• Subcategory 2: Holdowns and Tension Ties
• Warranty PDF: https://images.salsify.com/image/upload/s--K_9ww28_--/bgqxyqo1uhaqsqcvudu7.pdf
• Brand Video: https://images.salsify.com/video/upload/s--N-SMFYx9--/wpz3sdgci9c512ppr9df.mp4
• CAR Reference: 10707392032011
• PAL Reference: 50707392032019