Product Description
The Simpson SSTB 5/8 in. x 24-5/8 in. Hot-Dip Galvanized Anchor Bolt is engineered by Simpson for maximum performance as an anchor bolt for holdowns and Simpson Strong-Tie Strong-Wall shearwalls. Backed by extensive testing to determine design load capacity across many common applications, this anchor bolt is code listed by ICC-ES under the 2012, 2015, 2018, and 2021 IBC and IRC - giving contractors and engineers a reliable, code-compliant fastening solution for both monolithic and two-pour concrete installations.
Key Features
- Identification on the bolt head showing embedment angle and model - lets installers quickly confirm correct bolt orientation and identity in the field, reducing costly mistakes.
- Offset angle reduces side bursting and provides more concrete cover - protects structural integrity of the concrete pour and increases long-term durability of the installation.
- Rolled thread for higher tensile capacity - delivers stronger holding power compared to cut threads, supporting greater design loads in holdown and shearwall applications.
- Stamped embedment line aids installation - provides a clear visual reference during the pour so the bolt is set to the correct depth without guesswork.
- Suitable for monolithic and two-pour concrete applications - offers flexibility across different foundation and framing schedules on the jobsite.
- Hot-dip galvanized finish offers extra corrosion resistance - makes this anchor bolt a dependable choice for exterior applications and treated-wood framing where moisture exposure is a concern.
- ASTM F-1554, Grade 36 material - meets a recognized material standard, supporting consistent mechanical performance and code compliance.
Why This Product
- Engineered specifically for holdowns and Strong-Wall shearwalls - unlike general-purpose anchor bolts, the SSTB design has been extensively tested for these exact applications, giving engineers and contractors confidence in published design load values.
- ICC-ES code listing across four IBC and IRC code cycles - coverage under the 2012, 2015, 2018, and 2021 editions means this anchor bolt satisfies inspectors and plan checkers in jurisdictions using a wide range of currently adopted codes.
- Hot-dip galvanization adds a layer of protection where it matters most - for projects involving treated lumber sill plates or exposed exterior conditions, the HDG coating provides corrosion resistance that a standard zinc-plated bolt cannot match.
- Installer-friendly design details built into the bolt itself - the stamped embedment line, head identification markings, and offset angle work together to speed up placement, reduce errors, and help ensure the bolt performs as designed once the concrete cures.
Specifications
- MPN: SSTB20LHDG
- Diameter: 5/8 in.
- Length: 24-5/8 in.
- Thread Length: 6-1/2 in.
- Material: ASTM F-1554, Grade 36
- Coating: Hot-Dip Galvanized
- Finish: Hot-Dip Galvanized
- Country of Origin: United States
Approved Applications
- Anchor bolt for holdowns
- Anchor bolt for Simpson Strong-Tie Strong-Wall shearwalls
- Monolithic concrete applications
- Two-pour concrete applications
- Exterior applications requiring enhanced corrosion resistance
- Treated-wood applications requiring enhanced corrosion resistance
Note: Product dimensions may differ from picture.
Frequently Asked Questions
What are the primary uses for the Simpson SSTB20LHDG anchor bolt?
The SSTB20LHDG is designed for maximum performance as an anchor bolt for holdowns and Simpson Strong-Tie Strong-Wall shearwalls. It is suitable for both monolithic and two-pour concrete applications.
Why choose the hot-dip galvanized version of the SSTB anchor bolt?
Hot-dip galvanization (HDG) offers extra corrosion resistance, making the SSTB20LHDG especially well-suited for exterior and treated-wood applications where exposure to moisture or corrosive elements is a concern.
Are nuts and washers included with the SSTB20LHDG?
Nuts and washers for holdown attachment are not supplied with the SSTB. On HDG SSTB anchors, chase the threads to use standard nuts or couplers.
What building codes cover the Simpson SSTB anchor bolt?
The Simpson Strong-Tie SSTB anchor bolts are code listed by ICC-ES under the 2012, 2015, 2018, and 2021 IBC and IRC, ensuring compliance with widely adopted building code requirements.
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