When it comes to selecting the right size board for stair stringers, the most important thing to consider is the type of stairs you’re building. In general, for interior stairs, 2x12s (1-1/2” x 11-1/4”) are most commonly used.
Larger stairs may require 2x14s (1-1/2” x 13-1/2”). For exterior stairs, it’s recommended to use pressure-treated lumber such as a 2×12. When designing an exterior stair system with multiple stairs, it’s important to stay consistent with the size of the boards to ensure stability.
When it comes to the length of the board, it’s important to determine the required rise and run measurements. The rise is the vertical distance between the top and the bottom of the stair, while the run is the horizontal distance.
The length of the board should be the sum of the two measurements, with extra added on to ensure it covers the entire length of the stairs. Most stair stringers will require two holes drilled into each board, so it’s important to leave an extra inch or two on each end to compensate for this.
In order to provide adequate support, the number of stair stringers you’ll need is also important. It’s typically recommended to use two stringers for stairs with a rise of up to 7-1/2”, three stringers for stairs with a rise of 7-1/2” to 9”, and four stringers for stairs with a rise of 9” and above.
Regardless, it’s always best to consult with a professional before beginning any type of project involving stairs.
How far can 2×12 stair stringers span?
Stair stringers that measure 2×12 typically can span up to 9 feet with a standard rise of 7 ¼” and a run of 11” per step. The actual allowable span will depend on local building codes, size of treads and rise, type of wood used and the uniform load.
For example, if the stringers are made of southern pine, then the span length can vary between 10 to 11 feet. When planning a staircase, it is important to keep the total run of all steps between 20 to 25 steps.
If the flooring being used is decking, then the span can be between 10 ½ to 11 ½ feet. The larger the span, the more support the stringers will need. It is also important to use proper fasteners and connectors to support the staircase.
Connectors include 4×4 posts, U-brackets and joist hangers to help distribute the load. Specialty hardware such as the Strong-Tie® EBTY-S™ Concealed Structural Connector can also be used for greater support.
Working with a licensed contractor is the best way to ensure your stair stringers are adequately supported.
What is the rise and run for stairs?
The rise and run of a staircase refer to the vertical distance between each stair and the horizontal distance each stair covers. The ratio of the rise and the run of a staircase determines the angle of the steps.
A “standard” stair tread (run) is typically 10-inches, while a “standard” stair riser (rise) is typically 7-inches. This creates a 7-inch rise and 10-inch run, which creates a typical stair angle of between 35 and 38 degrees.
While the standard rise and run measurements are typically used in most homes, this may be customized for special needs and can be altered for a more comfortable staircase. Additionally, it is possible to have a separate rise and run for each step.
This is known as varying or jogged treads, and is a popular choice when stepping up or down from one level of the home to another, particularly when the difference in height is significant or from one staircase to another.
What goes first riser or tread?
When constructing or renovating a staircase, it is important to know the order of construction. Generally, the riser should be installed first, followed by the tread. The riser is the vertical part of the stair that goes between each step, while the tread is the horizontal surface that you walk on.
When installing the risers, it is important to make sure that they are even and level; if one riser is too low, it could throw off the whole staircase. After the risers are in place, start attaching the treads.
It’s generally best to keep the treads thick and sturdy. Staircases that are built from softwood can be prone to sagging over time, so opt for a hardwood material like oak or walnut, which is more durable.
Once the treads are in place, secure each one with screws. After the staircase is complete, caulk around all the joints to keep moisture and dirt from entering the steps.
What is the perfect step height?
The perfect step height will vary based on the individual user and their needs. Generally, the ideal step height is around 7-8 inches, although taller individuals or those with a longer stride may need a higher step height.
The best way to determine the ideal step height for you is to experiment with different heights and find the one that feels most comfortable and easy to manage. When climbing stairs, it is important to remember to keep your feet level to the step and maintain a consistent pace.
Additionally, it is important to ensure the steps are the same height and free of any obstructions such as toys or clutter. Finally, it is important to make sure your stairs are secure with good handrails and other safety features.
How many stringers do I need for 42 wide stairs?
The number of stringers you need to build 42 wide stairs depends on the type of stairs you are looking to build and the height of each stair. If you are looking to build a straight set of stairs, the most common option is to use three stringers.
Two of the stringers will be placed on either side and the third stringer will be in the center. The third or center stringer will provide additional support for the width of the stairs, making them strong and steady to walk on.
The height of each stair is also a factor in determining how many stringers are needed. For example, if the stairs are very tall, it is recommended to use a fourth stringer in the center. The fourth stringer will provide additional strength and stability to the stairs, making them more safe to walk on.
To sum up, you will want to use three stringers for a straight set of 42 inch wide stairs. However, if the stairs are very tall, you may want to consider adding an additional stringer in the center, giving you a total of four stringers.
It is recommended to consult with a professional contractor to confirm the number of stringers you need, as well as any other requirements that may be specific to the stairs you are looking to build.
How do you layout and cut stair stringers?
When laying out and cutting stair stringers it is important to take accurate measurements and use a high-quality saw blade. Generally, you’ll want to begin by finding the tread point at the top of the staircase, which is where the top edge of the stair tread will rest.
Mark and measure the overall staircase rise and run, and use a framing square to transfer these measurements to the stringer. Then be sure to mark the angle that the stringer will cut at the top and bottom of the stringer.
Other important measurements to make include the width of the stair tread, the total rise of the stairs, the total run of the stairs, the total width of the staircase, the angle of the stair slope, and the number of treads.
Once all the measurements have been taken, a circular saw should be used to cut the stringer. It’s important to make sure the saw blade is properly secured and the power is off before rotating the saw.
With the saw securely secured, slowly cut the stringer at the angle indicated by the measurements. Be sure to make a separate cut for each side of the staircase riser and tread. After the stringers have been cut, they should be dry-fitted to ensure they fit properly.
If any adjustments need to be made, do so before securing them with screws. Finally, use a level to make sure the stair stringers are level, and then secure them with screws.
How many square feet is 13 stairs?
It is not possible to calculate the square footage of 13 stairs because square footage is a measure of area, which is a two-dimensional concept. In contrast, stairs are a three-dimensional structure, consisting of risers, treads, and stringers.
When calculating the square footage of a staircase, it is important to consider the width and depth of each stair, as well as the length of each stair. Because these measurements vary based on the specific design of each staircase, it is impossible to calculate the exact square footage of 13 stairs without taking those specific measurements.
How many steps is 12 feet?
12 feet is equivalent to 144 inches, so it would take 144 steps to travel 12 feet in a straight line. However, if the area that you’re traversing has obstacles or turns, the exact number of steps will vary.