To calculate the run of the stairs simply multiply the tread dimension ensure this doesn t include the nose see below by the number of steps.
Staircase for 8 foot ceiling.
Or to work out how many steps you need take your ceiling height and divide by let s say 16 to start with.
Stair width is measured from edge to edge of each side of the tread perpendicular to tread length.
Rounded up that becomes 15.
Plan a typical staircase for a house with an 8 foot ceiling at 3 feet wide.
Building codes generally suggest at least 6 ft.
To calculate the rise of the stairs multiply the rise dimension by the number of steps.
The result is the number of risers required.
The maximum permitted height of a riser is usually 8 1 4 inches so divide the total rise of the stairs by 8 1 4 and round up to the next whole number.
Multiply the 15 needed treads by 10 inches and you get 150 inches or 12 feet 6 inches.
Once again this is not equally divisible by 7 5 but it yields 16 risers.
8 inches 203 2 cm of stair headroom.
If your equation equals a non whole number such as 12.
While measurements of length are conventionally longer than those of width when considering rectangles in the case of steps the width is usually.
For example if the total rise is 120 inches divide 120 by 8 1 4 to obtain 14 54.
The unit rise height is how tall you want your stairs.
For an eight foot wall height figure on a 14 foot long footprint for a straight staircase.
If you have nine foot high walls on the first floor your total height is 119 and 1 8 inches.