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Build safe, sturdy stairs for your deck or porch with this 4-step stair stringer. Each stringer is precut from Southern Yellow Pine with a 6-3/4" rise and 10" run for a uniform layout, making stair construction faster and easier. The pressure-treated pine resists rot, decay, and termites for years of outdoor use. Perfect for DIYers, this outdoor stair stringer helps you create professional-quality deck stairs without complicated cuts.

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Build safe, sturdy stairs for your deck or porch with this 5-step stair stringer. Each stringer is pre-cut from Southern Yellow Pine with a 6-3/4" rise and 10" run for a uniform layout, making stair construction faster and easier. The pressure-treated pine resists rot, decay, and termites for years of outdoor use. Perfect for DIYers, this outdoor stair stringer helps you create professional-quality deck stairs without complicated cuts.

LSCZ Pressure Treated Steel Outdoor Stair Stringer

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The LSCZ adjustable stair-stringer connector offers a versatile, concealed connection between the stair stringer and the carrying header or rim joist while replacing costly framing. Field slopeable to all common stair stringer pitches, the LSCZ connector is suitable for either solid or notched stringers. The LSCZ replaces additional framing and toe-nailing and is interchangeable for left or right applications.

6 -Steps Pressure Treated Southern yellow pine Wood Outdoor Stair Stringer

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Build safe, sturdy stairs for your deck or porch with this 6-step stair stringer. Each stringer is precut from Southern Yellow Pine with a 6-3/4" rise and 10" run for a uniform layout, making stair construction faster and easier. The pressure-treated pine resists rot, decay, and termites for years of outdoor use. Perfect for DIYers, this outdoor stair stringer helps you create professional-quality deck stairs without complicated cuts.

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The easiest way to build a solid and lasting staircase. Light and easy to manipulate, this stair frame is quickly installed. Designed in 1-piece, it is ready for steps. No more complicated assemblies. It will highlight your staircase and add a finishing touch to your house. This product is compliant with the international building code.

Steel stair stringer black 2 -Steps Steel Outdoor Stair Stringer

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The easiest way to build a solid and lasting staircase. Light and easy to manipulate, this stair frame is quickly installed. Designed in 1-piece, it is ready for steps. No more complicated assemblies. it will highlight your staircase and add a finishing touch to your house. This product is compliant with the international building code.

3 -Steps Pressure Treated Hemlock fir Wood Outdoor Stair Stringer

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The easiest way to build a solid and lasting staircase. Light and easy to manipulate, this stair frame is quickly installed. Designed in 1-piece, it is ready for steps. No more complicated assemblies. It will highlight your staircase and add a finishing touch to your house. This product is compliant with the international building code.

Steel Stair Stringer Black 4 -Steps Steel Outdoor Stair Stringer

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The easiest way to build a solid and lasting staircase. Light and easy to manipulate, this stair frame is quickly installed. Designed in 1-piece, it is ready for steps. No more complicated assemblies. It will highlight your staircase and add a finishing touch to your house. This product is compliant with the international building code.

Steel Stair Stringer Black 3 -Steps Steel Outdoor Stair Stringer

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The easiest way to build a solid and lasting staircase. Light and easy to manipulate, this stair frame is quickly installed. Designed in 1-piece, it is ready for steps. No more complicated assemblies. It will highlight your staircase and add a finishing touch to your house. This product is compliant with the international building code.

Steel Stair Stringer Black 6 -Steps Steel Outdoor Stair Stringer

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The easiest way to build a solid and lasting staircase. Light and easy to manipulate, this stair frame is quickly installed. Designed in 1-piece, it is ready for steps. No more complicated assemblies. It will highlight your staircase and add a finishing touch to your house. This product is compliant with the international building code.

4 -Steps Pressure Treated Hemlock fir Wood Outdoor Stair Stringer

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Ideal choice for decks, gazebos and all exterior projects

5 -Steps Pressure Treated Hemlock fir Wood Outdoor Stair Stringer

Severe Weather   5 -Steps Pressure Treated Hemlock fir Wood Outdoor Stair Stringer

Ideal choice for decks, gazebos and all exterior projects

2 -Steps Steel Outdoor Stair Stringer

Simpson Strong-Tie   2 -Steps Steel Outdoor Stair Stringer

The LSCZ adjustable stair-stringer connector offers a versatile, concealed connection between the stair stringer and the carrying header or rim joist while replacing costly framing. Field slopeable to all common stair stringer pitches, the LSCZ connector is suitable for either solid or notched stringers. The LSCZ replaces additional framing and toe-nailing and is interchangeable for left or right applications.

3 -Steps Pressure Treated Southern yellow pine Wood Outdoor Stair Stringer

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Ideal choice for decks, gazebos and all exterior projects

Shop Outdoor Stair Stringers at Lowe's

Outdoor stair stringers provide structural support for building stairs that connect decks, porches and other elevated outdoor spaces. Available in different materials, sizes and configurations, they help simplify stair construction. Find the right outdoor stair stringers for deck projects, porch upgrades and other outdoor building projects at Lowe’s.


Benefits of Outdoor Stair Stringers

  • Stair Construction Support: Outdoor stair stringers provide a framework for building stairs in outdoor spaces.
  • Simplified Installation: Preconfigured stringers can help reduce measuring and cutting during stair construction.
  • Flexible Project Applications: They're suitable for decks, porches and other outdoor access points.
  • Multiple Material Options: Wood and metal stringers can support different project requirements and design preferences.
  • Outdoor Durability: Pressure-treated and weather-resistant materials can help support long-term outdoor use.


Key Features of Outdoor Stair Stringers

  • Material Choices: Wood and steel outdoor stair stringers offer different durability, maintenance and appearance preferences.
  • Step Configurations: They're available with multiple step counts to accommodate different stair heights and project requirements.
  • Project Applications: Porch outdoor stair stringers and deck stairs outdoor stair stringers can support a variety of other outdoor installations.
  • Height Options: Choose from multiple height configurations for your deck, porch and entryway elevations.
  • Contact Ratings: Ground-contact and above-ground options can support different installation conditions.
  • Pressure-Treated Options: Select models include pressure-treated materials for additional outdoor durability.


How to Choose Outdoor Stair Stringers

  • Determine Stair Height: Measure the total rise from the ground to the deck or porch before selecting a stringer.
  • Match the Number of Steps: Choose a stringer configuration that fits your project's height requirements.
  • Select the Right Material: Compare wood and steel options based on durability, maintenance and appearance preferences.
  • Review Installation Requirements: Confirm compatibility with decking materials, stair treads and local building requirements.


Outdoor stair stringers can help support deck, porch and other elevated outdoor stair projects. Compare material, step configuration, height and contact rating before choosing. Shop decking and outdoor stair stringers at Lowe’s to find products for your next outdoor building project.