What are the dimensions of a normal staircase?

The stair’s width usually varies depending on the type of building the staircase is in, but for a normal residence, the standard tends to be 3 feet, 6 inches (106.7 cm). The minimum, in most places, is 2 feet 8 inches (81.3 cm). If a staircase exceeds 44 inches (111.8 cm), handrails are required for both sides.

What is a normal rise and run for stairs?

The 2018 IBC building code for rise and run of stairs is a maximum 7″ rise and minimum 11″ run (tread depth). The OSHA standard for rise and run of stairs is maximum 9.5″ rise and minimum 9.5″ run (tread depth).

How much space is needed for stairs?

A standard staircase occupies 30-square-feet of space above and below the staircase. This is the most common dimension, given an 8-foot ceiling, where the staircase width measures 3-feet (36-inches) and horizontal floor space occupied measures between 9- to 10-feet.

What is a comfortable stair width?

In general public spaces a minimum of 44” (112 cm) must be met—providing ample space for one person and allowing the tight passage of two people. Comfortable two person stair widths range between 49” (125 cm) to 60” (152 cm). For three simultaneous users, a minimum of 74” (188 cm) is recommended.

What is the average depth of a step?

Average Step Height, Width, And Depth The average step height in America is 7.5 inches. The depth is generally around 9 inches. As far as width goes, or the long part of the stairs, it’s primarily up to the homeowner.

What is the minimum width of a stairway?

36 inches
The IRC stairs code states that, to comply with stairway requirements, the minimum width for residential stairs be no less than 36 inches. The stair riser code is up to 7.75 inches, and can not vary more than 3/8 of an inch. There are also section codes in place for standard stair tread dimensions.

How much horizontal space is needed for stairs?

A staircase takes up a lot of room on both the lower and upper floors, requiring careful consideration of the location. Plan a typical staircase for a house with an 8-foot ceiling at 3 feet wide with between 9 and 10 feet of horizontal floor space.

How big of an opening do you need for a staircase?

The generally accepted minimum width for a stairway is 36 inches. The width of the stair opening is 36 inches or the actual width of the stairway, whichever is greater.

What is the average width of a stair step?

The width of the tread will determine how much of the stair is covered. Stair treads can be as narrow as 22.5 inches or as wide as 36 inches. Wider stair treads are typically used outdoors while narrower designs between 22.5 inches and 30 inches are more commonly used indoors.

How much head clearance do I need for a staircase?

The minimum head clearance for stairs according to IBC and OSHA is 80 inches (2032 mm) above the stair tread to any overhead obstruction or protrusion from the ceiling. The stairway headroom clearance is measured vertically from the edge of the stair tread or the nosing.

How much space is needed at the bottom of stairs?

Every staircase should have a landing at the top and bottom. The width of the landing, measured perpendicular to the direction of travel, must be no less than the width of the staircase. The minimum depth, measured in the direction of travel, is 36 inches.

How do you calculate stair opening?

Stair opening = ((floor thickness + headroom clearance) x stair run) / stair rise. The length of the stair opening is represented by the following equation. Progressively simplifying the equation gives (94 x 140) / 120, then 13,160 / 120, and finally 109.67.