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Choose a stair rise somewhere between 7 and 7-1/2 inches. Take your total height divided by that stair rise number. This will almost always give you a long decimal number. Round to the nearest whole number – this will be the number of steps you will have in your staircase.
How do you measure a stringer?
How to Calculate Stair Stringer Length Measure the height from the surface where the stairs will start to the bottom surface that the stairs will connect to. Divide the height of the staircase in inches by the intended rise of each step, also in inches, to assist in determining the stair stringer length.
How long should my stair stringer be?
Stringers should always be cut from 2x12s. Notching smaller stock doesn’t leave enough wood to safely carry the loads of a stair. When ordering stringers, allow about 14 inches of stringer length for each step.
Are stair stringers 2×10 or 2×12?
It is acceptable and within building code guidelines to use either 2×10 or 2×12 dimensional lumber to create a set of stairs; however, a stair stringer should not be less than 3.5 inches wide at its narrowest point to provide adequate strength for the load the stairs will be supporting.
How long should a 2×12 stringer be?
cut stringers. The two most common cut-stringer defects that I see are overspanning and overcutting. The minimum recommended size for a deck stair stringer is 2×12, which has a maximum recommended unsupported span of 6 feet.
How long of a 2×12 do I need for stringers?
How to Use the EZ Stair Calculator. We suggest 10.5″ for 2×12 or 2 – 2×6 Treads. Treads may be cut to suit other widths. Either B or C is required.
How do I calculate how many steps I need for stairs?
Divide the rise by 6 or 7 inches (15 or 18 cm) to find the total number of stairs. For larger stairs, divide by 6 and for smaller stairs, divide by 7. The total you get is how many stairs your future staircase will have so you can plan accordingly.
How do you calculate slope of stairs?
Slope of staircase is calculated by trigonometric formula that is Tanθ which is equal to ratio of opposite to adjacent in a right triangle such as Tanθ = opposite/adjacent, and θ = tan^-1 (opposite/adjacent), and this value of theta (θ) will give us slope of staircase in degrees.
Can I use 2×8 for stair stringers?
You should attach 2×6 or 2×8 support framing under the rim flush to the bottom of the stringer. The stairs will hang here. Install a piece of blocking below the rim joist to extend the attachment surface for your stairs stringers. Use a level to mark the top step.
Can I use 2×12 for stair treads?
Stair treads may be made of a single 2×12, but are often made of two decking boards or 2x6s. A stringer is a wide board, usually a 2×12, that runs at an angle from the landing pad to the deck framing and supports the treads. The stair treads should be at least 36 inches wide.
How far apart should stair stringers be?
Deck stairs are typically made from 2 x 12 stringers spaced about 12 to 16 inches apart. They rest on a solid foundation and are attached to the deck with hangers. They have risers (also called toe kicks), treads and railings. The stairs should be at least 36 inches wide.
What is a good rise and run for stairs?
Over the years, carpenters have determined that tread width times riser height should equal somewhere between 72 to 75 inches. On a main stair, the maximum rise should be no more than 8 1/4 inches and the minimum run should be no less than 9 inches.
How do you calculate stair landing?
The height of the landing is determined by where it is located along the stair run. In this design, since it is half way from the top level, it is 8 steps high (8 x height of each step (6 7/8) equals 55 inches). The horizontal positioning of the mid-level landing is determined by the number of treads on the stair run.
How tall is a 5 step stringer?
Stair Stringer-5 step Redwood (Common: 60 in. x 11 in.; Actual: 1.5 in. x 11 in. x 60 in.).
What is the best wood for stair stringers?
LP SolidStart Laminated Strand Lumber (LSL) and LP SolidStart Laminated Veneer Lumber (LVL) are ideal for Stair Stringers because they surpass traditional lumber products in length, strength and consistency.
How tall is a 4 step stringer?
Mendocino Forest Products Stair Stringer 4 step Redwood (Common: 48 in. x 12 in.; Actual: 1.5 in. x 11 in.
How do I calculate my walking steps?
To determine the number of steps it will take you to walk a mile, divide 5,280 by your step length. To determine the number of strides it will take you to walk a mile, divide 5,280 by your stride length.
How many stair stringers do I need?
If cut stringers are used in the stair construction, then at least three stringers are required. Cut stringers should be spaced no more than 18 inches on center. For example, a 36-inch-wide stairway should have three stringers. If the stairway is wider than 36 inches, four stringers should be installed.
