Product Description
The Simpson FRFP 7 in. x 9 in. HDG Retrofit Foundation Plate is a next-generation flat retrofit connector engineered to link the mudsill to the foundation and deliver lateral load resistance against earthquakes and high winds. Built from 7-gauge steel with a hot-dip galvanized finish, this plate is designed to give structural designers flexibility through a dual hole-fill approach - use the three standard holes to maintain familiar prescriptive requirements, or fill the two additional optional triangle holes to access increased load capacities and greater allowable spacing. Whether you are reinforcing an existing structure or specifying a seismic retrofit, this plate is built to perform in demanding real-world conditions.
Key Features
- Accommodates mudsill flush to the foundation or set back up to 1 1/2 in. - fits common retrofit installation conditions without requiring modification to the framing or foundation wall
- Two optional triangle holes unlock increased load ratings and wider spacing - gives designers the ability to upgrade connection performance and reduce the total number of plates needed per run
- When all five holes are filled, serves as a one-for-one replacement for 5/8-in. anchor bolts - simplifies retrofit projects by matching existing anchor bolt performance without major foundation work
- Hot-dip galvanized coating - provides enhanced corrosion resistance for use in exterior environments and applications involving treated lumber, where standard finishes may degrade over time
- 7-gauge steel construction - delivers the structural rigidity required for lateral load resistance in wind and seismic applications
- Installs with 1/2 in. diameter anchor bolts and 1/4 in. x 2 1/2 in. Strong-Drive SDS Heavy-Duty Connector screws - works with widely used fasteners to streamline the installation process on the job site
Why This Product
- Built-in design flexibility for engineers and contractors - the choice between filling three or all five holes lets designers select the load level and spacing that fits the project, without switching to a different connector
- A reliable path to anchor bolt replacement in retrofit scenarios - when all five holes are filled, the plate matches the performance of a 5/8-in. anchor bolt, making it a practical solution for seismic and wind-resistance upgrades on existing foundations
- Corrosion resistance where it matters most - the hot-dip galvanized finish is specifically suited for treated-wood mudsills and exterior conditions, helping maintain connection integrity over the long term
- Designed for the realities of retrofit work - the plate's geometry accommodates mudsills that sit flush or up to 1 1/2 in. inside the foundation edge, addressing the inconsistencies commonly found in older construction
Specifications
- Model Number (MPN): FRFPHDG
- Width: 9 in.
- Height: 7 in.
- Gauge: 7
- Coating: Hot-Dip Galvanized
- Finish: Hot-Dip Galvanized
- Install With: 1/2 in. diameter anchor bolts and 1/4 in. x 2-1/2 in. Strong-Drive SDS Heavy-Duty Connector screws
- Country of Origin: United States
Downloads and Resources
Frequently Asked Questions
What is the purpose of the two optional triangle holes on the FRFPHDG?
When the two optional triangle holes are filled, the plate offers increased loads and can be spaced farther apart, giving designers greater flexibility for wind or seismic design requirements compared to using only the three standard round holes.
Can the FRFPHDG replace a standard anchor bolt?
Yes. When all five holes are filled, the FRFP is a one-for-one replacement for 5/8-in. anchor bolts, providing equivalent connection performance in retrofit situations.
Is the FRFPHDG suitable for use with treated lumber or exterior applications?
Yes. The hot-dip galvanization (HDG) coating offers extra corrosion resistance specifically for exterior and treated-wood applications, making the FRFPHDG appropriate for these environments.
What mudsill setback conditions does the FRFPHDG accommodate?
The FRFPHDG is ideal where the mudsill is flush to the inside of the foundation or set back up to 1-1/2 in., providing installation flexibility in common retrofit scenarios.
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