The Simpson SP1 Stud Plate Tie is a 3-1/2 in. x 5-1/16 in. galvanized steel connector from Simpson engineered specifically for sill-to-stud connections at the bottom plate, where resisting uplift forces from wind and seismic activity is critical. Built from 20-gauge steel with a G90 zinc galvanized finish and featuring angled nail holes that drive one nail at a 45 deg. angle through the stud into the plate, the SP1 delivers a positive, structurally reliable tie between nominal 2x studs and bottom plates - whether you are framing new construction or reinforcing an existing structure in a retrofit application.

Key Features

• Formed embossments built into the connector - strengthen the stud-to-plate connection for a more rigid, reliable hold at every installation point
• Angled nail holes designed for a positive connection - one nail is driven at a 45 deg. angle through the stud into the plate, improving load transfer between members
• Engineered to resist wind and seismic uplift forces - gives builders and homeowners confidence that framed walls meet structural demands in high-load environments
• Suitable for new construction and retrofit applications - can be installed before or after framing is complete, making it practical for both original builds and structural upgrades to existing walls
• Compatible with nominal 2x member sizes - fits the standard framing lumber used in residential and light commercial construction without modification
• 20-gauge steel with G90 zinc galvanized finish - provides the corrosion resistance needed for long-term performance in demanding framing environments

Why This Product

• Purpose-built for sill-to-stud uplift resistance - unlike general-purpose framing hardware, the SP1 is specifically engineered for bottom plate connections where wind and seismic forces place the greatest demand on the stud-to-plate joint
• Retrofit-ready design saves time on structural upgrades - because the tie can be applied to framing that is already in place, contractors and DIYers can improve uplift resistance in existing structures without tearing into finished work
• Embossments and angled fastening work together - the combination of formed embossments and an angled nail driven through the stud into the plate creates a mechanically positive connection that plain flat straps cannot replicate
• G90 galvanized coating extends service life - the zinc galvanized finish helps the SP1 hold up against the moisture exposure common in framed wall assemblies, protecting the connector and the connection over time

Specifications

• Model Number: SP1
• Width: 3-1/2 in.
• Length: 5-1/16 in.
• Gauge: 20
• Member Size: Nominal 2x
• Coating/Finish: Zinc Galvanized, G90
• Country of Origin: United States

Approved Applications

• Sill-to-stud connections to resist uplift
• New construction framing connections between nominal 2x studs and bottom plates
• Retrofit applications where additional stud-to-plate resistance is required
• Structures requiring resistance to wind and seismic uplift forces

Install With (sold separately)

• Install with (10) 0.148 x 3-in. nails - one of the 0.148 in. x 3 in. stud nails is driven at a 45 deg. angle through the stud into the plate

Frequently Asked Questions

What is the difference between the SP1 and the SP2 stud plate tie?

The SP1 is designed for sill-to-stud connections at the bottom plate to resist uplift, while the SP2 is intended for double-top-plate-to-stud connections. Both ties are part of the Simpson Strong-Tie stud-plate tie series and feature angled holes for a positive connection from the stud to the plates.

What size studs is the SP1 compatible with?

The SP1 stud plate tie is designed for use with nominal 2x member sizes, which are standard framing lumber dimensions used in residential and light commercial construction.

Can the SP1 be installed in existing construction or only during new builds?

The SP1 can be used before or after installation, including in retrofit applications. This makes it suitable for upgrading existing structures to improve resistance to wind and seismic forces without requiring the framing to be disassembled.

What fasteners are required to install the SP1 stud plate tie?

The SP1 is installed with (10) 0.148 x 3-in. nails. One of these nails is driven at a 45 deg. angle through the stud into the plate to ensure a secure, positive connection between the stud and plate members.