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SKU: HHDQ11SS-SDS2.5

15-1/8" Simpson HHDQ11SS-SDS2.5 Heavy Holdown Quick-Install W/ SDS Screws - Stainless Steel

Name: 15-1/8" Simpson HHDQ11SS-SDS2.5 Heavy Holdown Quick-Install W/ SDS Screws - Stainless Steel
Brand: Simpson Strong-Tie
SKU: HHDQ11SS-SDS2.5
Price: 829.00 USD
Availability: InStock

ICC Certified

Height

15-1/8" 18-3/4"

Finish

Unfinished ZMAX Gray Paint

$829⁰⁰

Ships FREE in 1-2 business days.

Description

The Simpson Strong-Tie HHDQ Holdown is a heavy-duty structural holdown designed to anchor wood shearwalls and posts to concrete foundations. It transfers extreme uplift and overturning forces from wood framing into the foundation, helping protect structures in high-wind and high-seismic regions.

Built for maximum uplift resistance, the HHDQ series delivers higher load capacity than standard holdowns while maintaining a practical installation footprint. The included SDS structural screws provide a strong, code-compliant attachment to wood studs or post assemblies, streamlining field installation.

Featuring a compact heavy design, this structural connector provides high-strength performance without significantly increasing wall width.

Key Features:

Maximum Load Capacity: Engineered for high-demand uplift and overturning forces.
SDS Screws Included: Pre-engineered structural screws provide fast, reliable installation.
Compact Profile: Delivers heavy-duty performance in a space-efficient design.
Shearwall Anchorage: Secures wall ends and vertical framing members to foundations.
Finish Options: Available in corrosion-resistant finishes for interior or exterior use.

Specifications

Width: 2-7/8"

Height: 15-1/8"

Thickness: 7 Gauge

For Treated Lumber: Yes

Material: Stainless Steel

Finish: Unfinished

Manufacturer Name: Simpson Strong-Tie

Quantity: 1

Fasteners Required:
FASTENERS INCLUDED
(24) 1/4" x 2-1/2" SDS Screws

View Spec Sheet

ICC Certification - ESR 2330

Simpson Strong-Tie Limited Warranty

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HDU/HDUE/HDQ/HHDQ Holdowns

Holdowns and Tension Ties Reinforce Structural Connections

Holdowns and Tension ties are designed to strengthen critical structural connections where uplift and lateral forces occur. Commonly used in shear walls, deck connections, and wood framing, holdown anchors and tension ties help transfer loads from framing members to the foundation, reducing movement and improving overall structural stability.
Precision Fit for Critical Framing Connections

Tension ties and holdown connectors feature prepunched holes that allow accurate fastener placement and proper alignment during installation. These connectors reinforce high-load framing areas where standard fasteners alone may not provide sufficient strength.
Corrosion-Resistant for Outdoor Durability

Holdown anchors and deck tension ties are often installed in exterior environments where moisture and treated lumber are present. Many Simpson Strong- Tie connectors feature corrosion-resistant finishes like ZMAX or stainless steel to help maintain long-term strength and performance.

Broad selection, fast delivery

Our footprint

Our nationwide network of distribution facilities offers more product selection and faster delivery times. So far we’ve made remarkable progress in our expansion efforts, effectively doubling our capacity by adding a new 80,000 sq. ft. warehouse in Simpsonville, South Carolina, in addition to our existing 136,400 sq. ft. facility in Urbana, Iowa.

Broad selection, fast delivery

Our experience

We pride ourselves on delivering a user-friendly, high quality experience online and over the phone. Our knowledgeable team of experts is readily available via phone to assist with product questions and custom pricing inquiries. We’re available Monday thru Friday from 7:00 AM – 5:00 PM CST. We look forward to supporting you on your next job.

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