How high is a 2 step stair stringer?

Determining the height of a 2 step stair stringer requires some basic calculations using the rise and run of the steps. The rise is the vertical height of each step while the run is the horizontal depth of each step. Standard building codes provide guidelines for recommended rise and run dimensions based on the intended use and safety.

Typical Rise and Run Dimensions

For residential stairs, the standard rise is between 6 to 8 inches and the standard run is between 9 to 11 inches. This provides a balance of comfortable climbing angle and manageable step height. The specific dimensions depend on personal preference and building codes.

Type of Stair	Recommended Rise	Recommended Run
Residential	6″ – 8″	9″ – 11″
Commercial	6″ – 7″	11″ – 14″
Outdoor	4″ – 7″	11″ – 14″

As you can see, residential stairs often have a taller rise and shorter run than commercial stairs. This allows for more compact staircases in homes. Outdoor stairs tend to be more shallow with a shorter rise.

Calculating 2 Step Stair Stringer Height

To find the total height of a 2 step stair stringer, we simply need to add up the rise of each step.

For example, if each step has a rise of 7 inches, then the total rise for 2 steps would be:

Step 1 Rise: 7 inches
Step 2 Rise: 7 inches

Total Rise: 14 inches

Therefore, a 2 step stair stringer with a 7 inch rise would stand 14 inches high. This calculation remains the same regardless of the run dimension.

We can plug in different rise dimensions to see how it affects the total stringer height:

• 6 inch rise – Total Height = 12 inches
• 7 inch rise – Total Height = 14 inches
• 8 inch rise – Total Height = 16 inches

As you can see, the total stringer height directly corresponds to the rise. Larger rise equals greater height.

Building Code Guidelines

When determining rise and run, it’s important to consult your local building code requirements. Most building codes set maximum riser height and minimum tread depth for safety.

Common building code guidelines include:

• Maximum riser height between 6 to 8 inches
• Minimum tread depth of 9 to 11 inches
• Consistent rise and run dimensions between steps
• Minimum headroom clearance of 6’8″

These standards help prevent slipping, tripping or falling due to uneven steps or inadequate headroom. Building codes may vary by municipality, so check with your local building department when planning stairs.

Considerations for Comfort and Safety

Beyond building codes, there are other factors to consider for optimal comfort and safety:

• Aim for lower rise, longer run – More shallow stairs are easier to climb and descend.
• Avoid open risers – Closed risers prevent objects or feet from getting caught in open spaces.
• Use proper handrails – Full handrails on both sides provide support and stability.
• Maximize headroom – At least 6’8″ between stair nosings allows room to safely ascend and descend.
• Use slip-resistant surfaces – Textured materials, like wood or carpet, prevent slips and falls.

Always prioritize safety and accessibility when planning stair dimensions and layouts.

Standard 2 Step Stair Stringer Heights

Based on typical rise dimensions, common total stringer heights for 2 step stairs include:

• 12 inches (6 inch rise)
• 14 inches (7 inch rise)
• 16 inches (8 inch rise)

These heights allow for comfortable and compliant stairs in most residential settings. Remember to double check compliance with local building codes.

When a 2 Step Stair Stringer is Required

2 step stair stringers are commonly used in the following situations:

• Connecting a hallway, entryway or landing to an adjacent room
• Bridging a change in floor elevation of 24 inches or less
• Outdoor applications like porches, patios or decks
• Within living spaces to separate different activity areas

A 2 step configuration is ideal for small changes in elevation where a full staircase would be excessive. The compact stringer can fit into tight indoor or outdoor spaces.

Calculating Stair Stringer Height for More Steps

The same calculation can be used to find the stringer height for stairs with more than 2 steps:

Total Rise = Number of Steps x Riser Height

For example, a 3 step stair with a 7 inch rise would have a total stringer height of:

Number of Steps: 3
Riser Height: 7 inches
Total Rise = 3 x 7 = 21 inches

This formula works for any number of steps, just plug in the quantity and riser height to determine the total stringer height needed.

Stair Stringer Height Calculator

Use this calculator to determine the total stringer height for your project:

Number of Steps:
Riser Height (in):
Total Stringer Height:

Enter the number of steps and riser height, then the calculator will automatically determine the total stringer height in inches.

Cutting a 2 Step Stair Stringer

Once you’ve calculated the required stringer height, you can cut the stringer board to size. Use 2×12 lumber for structural integrity when spanning longer distances. The width of the lumber determines the overall run dimension.

Mark the rises and runs on the stringer board using a framing square and cut accordingly. Make test cuts on scrap wood first to ensure proper fit and angle. Use a circular saw or jigsaw to cut the stringer to shape.

Safety tip: Always wear eye protection when cutting wood to prevent injury from sawdust and debris.

Installing Stair Stringers

To install stair stringers:

1. Anchor the bottom of the stringer securely to the floor using lag screws.
2. Attach the top of the stringer to the upper landing surface.
3. Check that rises and runs match your planned dimensions.
4. Plumb the stringers with levels and temporarily brace in place.
5. Attach tread boards to create steps.
6. Install risers, balusters, handrails and other finishing components.

Take care that stringers are plumb, stable and able to safely carry the stair loading. Building codes require the structure to support a minimum 40 pounds per square foot.

Stair Alternatives to Stringers

Stringers are not the only way to support stairs. Some other options include:

• Box stairs – Enclosed on all sides with built-in risers.
• Floating stairs – Cantilevered with hidden supports.
• Ladder stairs – Alternating tread design with no risers.
• Spiral stairs – Circular staircases around a central pole.

These unique stair types may require consultation with an architect or engineer to ensure proper structural design.

Conclusion

Determining the correct 2 step stair stringer height requires calculating the total rise based on the number of steps and the individual riser height. Most residential 2 step stairs have a total stringer height between 12-16 inches. Always refer to local building codes for requirements and plan stringer height and layout carefully for safety. With the right calculations and technique, you can successfully build 2 step stairs with stringers in residential or commercial settings.