Stairs how long

The Total Rise should be not larger than inches mm between landings or floor levels. It is equal to the number of treads multiplied by the typical Tread Depth [B]. Risers - the Step Height [F] is the typical height of each step.

Multiply the 15 needed treads by 10 inches and you get inches or 12 feet 6 inches. How tall should doors be with 9 foot ceilings? This translates to 6-foot 8-inches off the floor when you have an 8-foot high ceiling or 8 feet off the floor for a 9 or foot ceiling. How narrow can a staircase be? Staircase Width: 36 Inches, Minimum Narrow stairs make it more difficult to carry items up and down the stairs.

Awkward positioning of these items may lead to falls. Most importantly, stairs that are not wide enough can be dangerous during a fire, as they might impede escape. How do you design a staircase? Begin by measuring the total rise. This is the measurement from the finished floor below to the finished floor level above.

You will then need to work out the number of risers required. To stay within Building Regulations, a domestic staircase needs a rise of between mm and mm. The stair rise refers to the height of each step in your staircase.

Most state codes mandate that the stair be at least four inches in height but no more than eight inches in height. You can choose a rise anywhere between these mandates, but the popular belief is that a rise of about seven inches results in the most comfortable stride.

Once you determine the rise for your stairs, you can determine how many stairs you will need in total. The run refers to the depth, or flat portion, of each stair.

Most state codes mandate that the stair run be no less than nine inches but inches is accepted as the most comfortable run for a flight of stairs.

While not all features are optional, all of them are additions to your staircase and will require extra ground space to accommodate. Many state codes require a banister to be installed on any staircase that has more than four steps. The space your banister will take up depends on the style of the banister you choose. The standard banister will measure between inches and inches tall. Simpler banisters will be minimal in width, while more ornate banisters might be bulkier.

It would be beneficial to choose your projected banister and get its measurements before installing your staircase so you can be sure that you have the proper space for the one you choose. In my example above for the 8-foot-high wall home, this means you will have 13 treads for a total length of inches or 10 feet 10 inches.

If the stairs end at a wall, you must also figure in a minimum three-foot landing or clear floor area at the bottom of the steps. For an eight-foot wall height, figure on a foot-long footprint for a straight staircase. Once again this is not equally divisible by 7. Multiply the 15 needed treads by 10 inches and you get inches or 12 feet 6 inches. Add to this the three-foot clear area and you end up with 15 feet 6 inches for a straight staircase in a house with nine-foot-tall interior walls.

You can minimize the footprint by installing an L-shaped stairway if needed. It can also be useful for cutting the angle on the top of the stair rail pickets.

Stringer Length - the stringer length calculation is the minimum length of 2x12 material that is required to layout and cut the stringer. Stairs and Landings - Landings are used to break up runs of stairs. Building code states that the minimum width of a landing should not be less than the width of the flight of stairs that is served.

Click here for more information on cutting stringers and general stair building. The Mobile Stair Calculator is available as always on mycarpentry.

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