how to build angled deck stairs

"Mastering Angles: Step-by-Step Guide to Build Stunning Angled Deck Stairs"

By James Thompson
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Building Angled Deck Stairs: A Comprehensive Guide

Angled deck stairs, also known as L-shaped or switchback stairs, are an excellent solution when you need to navigate a significant height difference or space constraints. They not only provide safe access but also add visual interest to your outdoor space. Here's a step-by-step guide to help you build angled deck stairs that are both functional and aesthetically pleasing.

Planning and Design

Before you start building, it's crucial to plan and design your angled deck stairs carefully. Here are some factors to consider:

  • Height and Rise: Ensure the total rise of your stairs does not exceed 30 inches, with each step having a maximum rise of 7.5 inches.
  • Run and Tread: The run (depth) of each tread should be at least 10 inches. The total run of your stairs should be comfortable for you to walk on, typically around 36-48 inches.
  • Angle and Stringers: Decide on the angle of your stairs and calculate the number of stringers (support beams) you'll need. A 45-degree angle is common, but you can adjust this based on your needs.
  • Materials: Choose durable, weather-resistant materials like pressure-treated lumber, composite, or cedar for your stairs.

Gathering Tools and Materials

Before you begin construction, make sure you have all the necessary tools and materials:

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Angled stringers for deck stairs
Angled stringers for deck stairs
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Building Cascading or Wrap Around Stairs | Decks.com
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  • Tape measure
  • Circular saw
  • Drill and driver set
  • Level
  • String level
  • Speed square
  • Chalk line
  • Pressure-treated or composite lumber (for treads, stringers, and risers)
  • Galvanized hangers and screws
  • Concrete pier blocks or post bases (if needed)

Laying Out and Building the Stringers

The stringers are the backbone of your angled deck stairs, supporting the weight of the treads and users. Here's how to lay out and build them:

  1. Determine the location of your stairs and mark the stringer layout on the deck or ground using a chalk line.
  2. Cut your stringers to length, making sure they extend at least 12 inches beyond the bottom of your stairs to rest on concrete pier blocks or post bases.
  3. Using your chosen angle (e.g., 45 degrees), mark the stringer layout on the top of each stringer. This will be the pattern for your treads and risers.
  4. Cut out the stringer layout using a jigsaw or circular saw, ensuring each stringer is identical.
  5. Attach the stringers to the deck frame using galvanized hangers and screws, ensuring they are level and plumb.

Installing the Treads and Risers

Once your stringers are secure, you can install the treads and risers:

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  1. Cut your treads to size, ensuring they fit snugly within the stringer layout.
  2. Attach the treads to the stringers using galvanized screws, driving them in from the underside of the treads to hide the heads.
  3. Install risers between the treads, if desired, to create a closed stairwell. Attach them using galvanized screws driven in from the sides.

Finishing Touches

With your angled deck stairs complete, it's time to add the finishing touches:

  • Handrail: Install a handrail along the open side of your stairs for safety. Ensure it meets local building codes and is securely attached to the stringers.
  • Stain or Paint: Apply a protective stain or paint to your stairs to enhance their appearance and longevity.
  • Inspect: Thoroughly inspect your stairs to ensure they are stable, level, and safe for use.

Building angled deck stairs can be a challenging but rewarding project. By following this guide and taking your time, you'll create a functional and attractive addition to your outdoor space. Always remember to prioritize safety and consult local building codes before starting any construction project.

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