The standard size of stairs for residential and commercial buildings can vary depending on local building codes and regulations. However, some common guidelines are as follows:
1. Riser Height: The typical range for residential riser heights is 7 to 7.75 inches (17.78 to 19.68 cm), while for commercial buildings, it’s usually around 7 to 7.25 inches (17.78 to 18.42 cm).
2. Tread Depth: Residential stair tread depths typically range from 10 to 11 inches (25.4 to 27.94 cm), while commercial stairs may have slightly deeper treads, around 11 to 11.5 inches (27.94 to 29.21 cm).
3. Stair Width: A common minimum stair width for both residential and commercial buildings is 36 inches (91.44 cm), but commercial buildings may require wider stairs depending on occupancy.
4. Handrails: Handrails are typically required on at least one side of a stair and should be about 34 to 38 inches (86.36 to 96.52 cm) in height.
5. Headroom: There should be a minimum of 80 inches (2.03 meters) of headroom clearance above the stairs.
Construction of stair or staircase in a residential house is the most necessary component of your home that access flight between one floor to another, it may be straight, L shaped, U shaped, spirally curved cantilever split and winder shape.
Stair may be in a straight run leading from one floor to another without turn or change in direction, it may change direction to flight connected at 90-degree angle landing and in a multistorey or high rise building its turn 180-degree angle.
What is stair or staircase?
In building, stairs is a term applied to a complete flight of steps between two floor and a stair of flight is run of stairs or steps between landing. It may be straight, round, may consists of two or more straight pieces connected at angle. Stairs may also called stairway, staircase, stairwell, or flight of stairs.
One may ask, “what is the meaning of stair?”, stairs means that access your flight between one floor to another and make used in building for moving from ground floor to upper floor. Staircase have many component like riser, tread, step, flight, landing etc.
Different part in staircase is tread, riser, landing, horizontal length, step, flight and inclined length. Let us know about different part of a stair definition
Staircase:- staircase is used in building for moving from ground floor to upper floor. Staircase have many component like riser, tread, flight, landing etc.
Tread:- the part of the stair that is stepped on and tread is defined as horizontal part of staircase on which we first apply foot on this for moving from ground floor to upper floor. The tread depth is measured from the back of one tread the back of next and their width is measured from one side to other.
Riser:- the vertical portion between each tread on the stair is riser, it may be missing in open stair, riser height measured from bottom each tread to next upper tread, or riser height may also called vertical distance between two tread.
Step:- the series of Riser and tread in which tread is horizontal part and riser is vertical part is called step, 1 tread and 1 riser make 1 step.
Flight:- series of step on stair without any platform is called flight. Generally in residential building there is a two flight and one landing . When we reach up to landing we turn and reach up to the upper floor.
Nosing:- an edge part of tread that protrudes over the riser beneath. Many Building Code require stair nosing for commercial, industrial or Municipal building, they provide additional length to the tread without changing the pitch of the stair.
Standard Size of stairs
The standard width of a staircase (stairs) in a normal residential building is usually 3 feet 6 inches (or 100 cm or 1 meter or 1,000 mm). The typical tread width excluding nosing should be 250mm (10 inches) and the riser height should be between 150mm and 190mm.
In India, the standard size of staircase has dimensions in terms of width for a typical residential building tends to be 3.5 feet (or 100 cm, 42 inches, 1 meter or 1000 mm) in width and a 13 feet in length.
The minimum width of stairs (stairway, or staircase, stairwell) is about 3 feet (1 meter) for a residential building, 5 feet (1.5 meters) for hotels, 6-7 feet (2 meters) for assembly structure like auditorium and theatres, 5 feet (1.5 meters) for office builing, 6-7 feet (2 meters) for educational structures like school, college and coaching institutes and 6-7 feet (2 meters) for industrial and commercial structure.
The standard size of stairs (staircase) in terms of width for a typical commercial building tends to be 6-7 feet (or 2 meters) wide and a 13 feet long.
The stair’s width measured from one side to other usually varies depending on the type of building. The minimum, in most places, it is 2 feet 8 inches (81.3 cm). Minimum width of tread without nosing shall be 250mm (10″) for residential building and other building it will be goes upto 300mm (12″). Height of riser shall be range between 150mm to 190mm.
Standard Stairs size in feet
The standard size of stairs (or staircase) in terms of width for a normal residential building in feet is typically 3 to 3.5 feet wide and 12-13 feet long. A typical width of tread without nosing shall be 0.833 feet and height of riser shall be range between 0.5 to 0.633 feet.
The stair’s width measured from one side to other, its depending on the type of building, but for a normal residence, the size of stairs in feet tends to be 3 to 3.5 feet wide. The minimum, in most places, it is 2 feet 8 inches. Minimum width of tread without nosing shall be 0.833 feet for residential building and other building it will be goes upto 1 feet. Height of riser shall be range between 0.5 to 0.66 feet.
Standard Stairs size in inches
The standard size of stairs (or staircase) in terms of width for a normal residential building in inches is typically 36 to 42 inches wide and 12-13 feet long. A typical width of tread without nosing shall be 10 inches and height of riser shall be range between 6 to 7-3/4 inches.
Stairs size in inches:- the stair’s width measured from one side to other, its depending on the type of building, but for a normal residence, the size of stairs in inches tends to be 36″ to 42 inches wide. The minimum, in most places, it is 32″ inches. Minimum width of tread without nosing shall be 10″ for residential building and other building it will be goes upto 12 inches. Height of riser shall be range between 6″ to 8″.
Standard Stairs size in mm
The standard size of stairs (or staircase) in terms of width for a normal residential building in mm is typically 900 to 1050 mm wide and 3600-3900 mm long. A typical width of tread without nosing shall be 250 mm and height of riser shall be range between 150 to 190 mm.
Stairs size in mm:- the stair’s width measured from one side to other, its depending on the type of building, but for a normal residence, the size of stairs in mm tends to be 900 to 1050 mm wide. The minimum, in most places, it is 800 mm wide. Minimum width of tread without nosing shall be 250mm for residential building and other building it will be goes upto 300mm. Height of riser shall be range between 150 to 200mm.
Standard Stairs size in cm
The standard size of stairs (or staircase) in terms of width for a normal residential building in cm is typically 90 to 105 cm wide and 360-390 cm long. A typical width of tread without nosing shall be 25 cm and height of riser shall be range between 15 to 19 cm.
Stairs size in cm:- the stair’s width measured from one side to other, its depending on the type of building, but for a normal residence, the size of stairs in cm tends to be 90 to 105 cm wide. The minimum, in most places, it is 80 cm wide. Minimum width of tread without nosing shall be 25cm for residential building and other building it will be goes upto 30cm. Height of riser shall be range between 15 to 20cm.
Standard Stairs size in meters
The standard size of stairs (or staircase) in terms of width for a normal residential building in meters is generally 0.9 to 1.05 meters wide and 3.6-3.9 meters long. A typical width of tread without nosing shall be 0.25 meters and height of riser shall be range between 0.15 to 0.19 meters.
Stairs size in cm:- the stair’s width measured from one side to other, its depending on the type of building, but for a normal residence, the size of stairs in cm tends to be 0.90 to 1.05 meters wide. The minimum, in most places, it is 0.80 m wide. Minimum width of tread without nosing shall be 0.25m for residential building and other building it will be goes upto 0.30 meters. Height of riser shall be range between 0.15 to 0.20 meters.
Stairs tread size
Stairs tread size:- The minimum width of tread without nosing shall be 250mm (10″) for residential building and other building such as institutional, educational, hotel it will goes up to 300mm (12″). Stair tread is horizontal part of staircase on which we first apply foot on this, stairs tread size depending on different country building bylaws.
Stairs Riser height
Stairs Riser height:- For normal residence maximum height of Riser shall be 190mm (7.5″) and for other such as commercial, industrial educational, institution and assembly building standard one is 150mm (6″) high. Riser shall be limited to 12 per flight. Riser represent vertical part of stairs, generally represented by their height, Riser height depending on type of building.
Stairs step size
Stairs step size:- For normal residence width of step tends to be 3 to 3.5 feet (36″ to 42″) wide one side to another, height of step shall be 6″ to 8″ (150 to 200mm) rise and their width of run or tread shall be minimum 10″ (250mm) without nosing and it will be even goes to 300mm (12″) for other building. The step is the series of Riser and tread in which tread is horizontal part and riser is vertical part, stairs step size depending on building type.
Width of stairs or staircase
Width of stairs or staircase:- The minimum width of stair or staircase shall be 1 meter (1000 mm, 3 feet 3 inches) for residential building, 1.5 meters for hotel building, 2 meters for assembly building such as auditoria, theatre and Cinemas, 1.5 meters for educational building, 2 meters for institutional building and 2 meters for Industrial and commercial building. But a standard one is 3 feet 6 inches for normal residential home.
Height of landing
Height of landing:- The minimum height of landing must be atleast 7 feet (2.1 meters) or more that make clear head room for passage under the landing of stairs. Landing is the platform in the stair where you turn.
Landing width
Landing width:- The width of the stairs landing is 3 feet 6 inches wide and 7 feet 6 inches in length. Landing width measured from one side to other Side, generally it will be equal to width of step which is 3 feet 6 inches wide and 7 feet 6 inches in length, minimum 4″ to 6″ is gap or space between two flight. Other landing width such as 3 feet and 3 feet 3 inches is also applicable.
Height of one flight of stairs
Height of one flight of stairs:- The height of one flight in stairs is equal to height of landing which is minimum must be at least 7 feet (2.1 meters) or more that make clear head room for passage under the landing of stairs. Flight term is defined as an uninterrupted series of steps that containing series of run and rise excluding landing.
Standard size of stairs
Stairs standard size:– the stair’s width measured from one side to other usually varies depending on the type of building but for a normal residence, stairs size standard tends to be 3 feet 6 inches (100cm, 1m or 1000mm) wide and for other commercial, industrial, educational, institution building even goes up to 5 to 7 feet (1.5 to 2 meters) wide, standard width of tread without nosing shall be 250mm (10″) for residential building and other building it will be goes upto 300mm (12″) and standard height of riser shall be 7 inches (180mm) for residential and 6 inches (150mm) for commercial building.
What is standard size of Riser of stairs
Standard size of Riser of stairs:- size of Riser Defined by their vertical height, standard height of riser shall be 7 inches (180mm) for residential and 6 inches (150mm) for commercial building and other standard one size such as 7.5″, 6.5″, 5″, 5.5″ & 6″ high also applicable in normal residential, educational, institutional, assembly and other building.
What is standard size of tread (run) of stairs
Standard size of tread of stairs:- size of tread or run Defined by their horizontal width, standard width of tread shall be 10 inches (250mm) without nosing for residential and 12″ inches (300mm) for commercial, educational, institutional, assembly and other building. Other standard one size such as 11″ (280mm) is also applicable in some countries.
Standard step size for stairs
Standard step size for stairs:- step is the series of Riser (rise and tread (run) in which tread is horizontal part and riser is vertical part, standard step size for stairs depending on building type, but for normal residence standard width of step tends to be 3 to 3.5 feet (36″ to 42″) wide one side to another, height of step shall be 7″ (180mm) rise and their standard width of run or tread shall be 10″ (250mm) without nosing and it will be even goes to 300mm (12″) for other building.
Standard size of stairs according to US standard
Standard size for stairs:- in United State, Building bye laws of regulation of building code for stairs for normal residence describe that standard tread width shall be minimum 10″ (25.4cm) is detected by average adult of foot size, standard riser height shall be 7 3/4 inch (19.7cm) and minimum width of stairs shall be 3 feet (90cm).
Standard size of stairs according to Indian standard
Standard size of stairs:- as per Indian National Building Code 12.18.1.1, for normal residential, standard width of staircase shall be 3 feet 6 inches (105 cm), minimum width of tread or run without nosing shall be 250 mm (10″), if nosing require then it will be 10 1/4″ (260mm) and standard height of Riser shall be 7″ (180mm).
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According to Indian standard, minimum width of staircase shall be range between 5 to 7 feet (1.5 to 2 meters) for commercial, industrial, residential Hotel, assembly building (auditoria theatre and Cinemas), educational, institution and other type building. Standard tread width shall be 12″ (1 feet) and riser height shall be 6″ (150mm) for commercial building in India.
Standard size of stairs according to UK standard
Standard size of stairs UK:- according to UK standard staircases should have a maximum rise of 220mm and a minimum going of 220mm, they should have a maximum pitch of 42°, flights should have a handrail on at least one side if they are less than one metre wide and on both sides if they are wider than this, handrails on stairs and landings should have a minimum height of 900mm and a minimum of 2,000mm of clear headroom is required above the pitch line.
Standard size of stairs according to Australian standard
According to Australian standard, width of stairways shall be equal or more than 600 mm wide inside the stile and have minimum clearance of 550mm between rail, width of landing shall not be less than stairways with a minimum of 600mm clear of cross traffic and their length should be 2000mm, minimum headroom is typically 2000mm and even increased to 2200mm, Riser height shall be a range between minimum to maximum which is 130mm and 225mm and minimum going shall be 215mm and maximum is 355mm with nosing.
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Standard size of stairs according to Canadian standard
According to National Building Code of Canada for stairs suggest that stairs shall be inclined at an angle of not more than 45° with the horizontal, and their steps shall have risers not more than 210 mm high and treads not less than 220 mm wide exclusive of nosing. Stairways headroom shall be not less than 1 950 mm plus the height of one riser measured vertically above the nosing of any tread or platform.
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Standard size of stairs according to SA standard
According to South Africa Housing code for indoor stairs, the riser height should be range between 120 mm and 180 mm, and the tread width shall be range between 280 mm and 350 mm. For outdoor stairs, the maximum riser height should be 150 mm and the minimum tread should be 300 mm. An intermediate landing should be provided when the stairs cover a difference in level of more than 2500 mm.
What is a comfortable step hight?
According to many country code of building researcher found that comfortable step height or rise shall be 7 inches (180mm) and comfortable step width or run (going or tread) shall be anywhere range between 10″, 11″ and 12″ (250 to 300mm) exclusive nosing. This is ideal, normal, best, standard height and width of step for stairs.
Why should stairs be clockwise?
As per vastu stairs should always be constructed in a clockwise direction, which means that the person climbing should move from north to south or east to west. Presence of anti-clockwise staircase can impact your career growth and chances of restarting everything become higher.
Conclusions:-
The standard size of stairs (or staircase) in terms of width in a normal residential building tends to be 3 feet 6 inches (or 100cm, or 1 in meter or 1000 mm) wide. A typical width of tread without nosing shall be 250mm (10″) and height of riser shall be range between 150mm to 190mm.