7 Types of Stair Stringers & the Best Materials to Use

1. Straight Stringers:

Straight stringers are the simplest and most common type of stringer. They are used to support stairs that have a straight run, with no turns or curves. The best material to use for straight stringers is either pressure-treated lumber or metal such as aluminum or steel.

2. Angled Stringers:

Angled stringers are designed for staircases that require a turn, such as a spiral staircase. The best material to use for angled stringers is metal, such as aluminum or steel, since these materials can be easily bent into the desired shape without compromising structural integrity.

3. Notched Stringers:

Notched stringers are designed to support staircases with multiple landings or platforms along their length. Notches are cut out of the stringer so that treads and risers can be attached directly to the stringer itself instead of being mounted to separate supports. The best material to use for notched stringers is metal, such as aluminum or steel, since these materials can be easily shaped into the desired configuration without compromising strength and stability.

4. Flared Stringers:

Flared stringers are designed for staircases that require an outward curve at their base, such as those found in some
more modern designs. The best material to use for flared stringers is metal, such as aluminum or steel, since these materials can be easily bent into the desired shape without compromising structural integrity.

5. Cut Stringers:

Cut stringers are designed for staircases that require a custom-made design with angles and curves. The best material to use for cut stringers is metal, such as aluminum or steel, since these materials can be easily shaped into the desired configuration without compromising strength and stability.

6. Boxed Stringers:

Boxed stringers are designed for staircases with a boxed-in look, where the sides of the staircase are enclosed with walls or panels. The best material to use for boxed stringers is metal, such as aluminum or steel, since these materials can provide extra support to the structure and maintain its integrity over time.

7. Cantilevered Stringers:

Cantilevered stringers are designed for staircases that require an overhang from one side of the staircase to the other. The best material to use for cantilevered stringers is metal, such as aluminum or steel, since these materials can provide extra support to the structure and maintain its integrity over time.

Tip for Stair Stringers

When choosing the material for your stair stringers, consider its strength and durability as well as how it will look in your home. Pressure-treated lumber is a great option for straight stringers, while metal is best for angled, notched, flared, cut, boxed, and cantilevered stringers.