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Prepare Base and Install Stair Stringers

From Deck Stairs · Step 1 of 8 · Video by C.L.S. ALL-IN-ONE

Showing 5:20–6:48 of the source video. Watch the full video with every moment.

What happens in this clip

Before installing the pre-made stair stringers, it's essential to prepare a solid, non-dirt base to prevent direct contact with the ground, which can lead to rot and instability. Dig out a shallow trench in the dirt where the bottom of the stairs will rest. Lay concrete pavers in this trench, ensuring they are level and at the correct height to support the stair stringers. Once the pavers are level, the pre-made stair stringers (purchased from a home improvement store) can be positioned on top of them. The presenter uses three stringers: one in the middle and one on each end. These stringers are toenailed into the top deck frame using screws, driving them at an angle to secure them.

Goal: Provide a concrete base for the stairs and attach the stringers to the porch frame.

What's used

Tools

  • Impact Driver Ryobi
  • Level
  • Pre-made Stair Stringers Home Depot (mentioned)
  • Shovel

Materials

  • Concrete Pavers
  • Gravel base with a concrete slab
  • Construction Screws

About the full video

This project details the process of replacing old, sloped concrete steps that cause negative drainage towards a house foundation with a new freestanding wooden porch and steps. The project involves demolishing the existing concrete structure, setting concrete deck blocks for a stable foundation, constructing the wooden base frame and posts, installing the deck boards and stair stringers, building stair treads, and finally adding the top and side railings with uprights, ensuring all components are level and securely fastened.

Step 1 of 8: Prepare the Stair Location

Clear vegetation, debris, and any obstacles from the ground where the base of the deck stairs will rest. Ensure the ground is level and compacted to provide a stable foundation for the stringers. If the ground is soft, consider adding a layer of gravel or concrete pavers for better support.

Open this step in the guide

Every video in Deck Stairs

  1. Step 1: Prepare the Stair Location

  2. Step 2: Mark Stringer Placement

  3. Step 3: Attach Stringers to Deck

  4. Step 4: Secure Stringers to Ground

  5. Step 5: Cut and Attach Risers (Optional)

  6. Step 6: Install Treads

  7. Step 7: Install Railings

  8. Step 8: Final Inspection and Finishing Touches

Questions about Deck Stairs

What tools and materials are essential for building deck stairs using pre-cut stringers?

You will need basic tools like a measuring tape, level, drill with drill bits, shovel, and rake for site preparation. Key materials include pre-cut pressure-treated pine stair stringers, gravel and concrete mix for securing the base, appropriate exterior structural lag screws, and decking boards for the treads. The specific list provided includes items like Anvil digging shovel, OX marking pencil, Empire plumb bob, Quikrete gravel, SAKRETE concrete mix, SPAX lag screws, and Composite Decking Boards.

What are the most critical safety precautions I should take when building deck stairs?

Safety is paramount for structural projects like deck stairs. Always wear appropriate personal protective equipment, including safety glasses, gloves, and sturdy footwear. Ensure all connections are secure and stable, especially where stringers attach to the deck and ground. Always follow manufacturer's instructions for materials and power tools, and verify stability at each step.

How can I ensure my deck stairs comply with local building codes?

Compliance with local building codes is crucial for safety and legality. Before starting, consult your local building department for requirements on rise, run, width, handrails, and foundation for deck stairs. These codes vary by location and are designed to prevent structural failure and ensure safe use. Hiring a licensed professional can help navigate these complex requirements.

What common mistakes should a beginner avoid when installing pre-cut stair stringers?

A common mistake is improper site preparation, leading to unstable ground support. Ensure the ground is level, well-compacted, and has adequate drainage using gravel and pavers. Another error is not securely attaching the stringers to both the deck and the ground, which can compromise the entire structure's stability. Always double-check measurements and use a plumb bob and level for accurate placement.

What is the estimated time commitment and difficulty for this deck stair project?

This project is rated as 'beginner' difficulty with an estimated time of 3 days. However, factors like your experience level, site conditions, and adherence to local codes can extend this. Breaking the project into manageable steps and having all tools and materials ready will help keep it on schedule.

Are there alternative materials or methods for securing deck stair stringers to the ground?

While the project suggests gravel, concrete mix, and pavers, alternative methods for ground support include concrete footings or pre-cast concrete piers. The chosen method depends on local frost lines, soil conditions, and building codes. Always ensure the ground connection is robust and prevents settlement or shifting over time.

Deck Stairs

This project outlines the process of building deck stairs using pre-cut stringers. It covers site preparation, attaching the stringers to the deck, securing them to the ground, and installing treads and railings. Safety is paramount throughout the process, and it's recommended to consult local building codes and consider hiring a professional for complex steps.

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Prepare Base and Install Stair Stringers — Deck Stairs | Oak Valley Designs

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