For secondary staircases a minimum width of 600mm is recommended. However, it is generally accepted that on a main staircase, going up to the first floor serving multiple rooms should be no less than 800mm, however, we would recommend 850mm to 950mm as this allows more space to get things up the stairs. Measure the width of the staircase from end to end. There are no restrictions when it comes to width, but standard flights measure 860mm, and for a main staircase it is agreed that a width of between 800mm and 900mm works best. The minimum stairway width shall be 26 inches (660 mm). However, those with narrow staircases need not worry. The minimum, in most places, is 2 feet 8 inches (81.3cm). The minimum headroom above stairs should be measured vertically from the pitch line. 1450mm x 1450mm minimum for a 1400mm diameter flight). A minimum width between handrails of 1000mm. It is also a Building Regulations requirement that no openings in any balustrading should allow the passage of a 100mm sphere. If the stair width is more than the minimum specified width, handrails are to installed in the stairs. Minimum width of a flight of stairs. The angle of pitch of a staircase shall be not less than 26.5 degrees and not greater than 45 degrees. Going: Minimum Centre . No recommendations are given for minimum widths in England, Wales and the Isle of Man. Width of flights of stairs 18 Length of flights of stairs 18 Landings for stairs 19 Special stairs 20 Fixed ladders 23 Handrails for stairs 23 Guarding of stairs 27 Access for maintenance 27 Consultation Version. Firstly measure the width and depth of the opening as shown. Alternate treads steps must be uniform with parallel nosings. “going” refers to the horizontal dimension from the front to the back of a tread (or the width of the stair tread you place your foot on). Stairs that have treads narrower than this are considered narrow and it may pose a potential safety risk to install a seated stairlift in such a small space. Take the largest width that you calculate, and use it for the entire stairway system. Under staircase dimensions mistake. 2 Approved Document K Building Regulations 2010. COMMERCIAL STAIR WIDTH. For code requirements, the minimum staircase width is the horizontal dimension between the sidewalls of a staircase, measured above the handrail(s). Measure the Width of the Staircase. The depth of each tread should conform to the minimum requirements for the stiarcases location … Select an item on the right to compare relative dimensions to Spiral Staircase. To gain an idea of whether a stairlift is practical with the width of your stairs you could place a chair on the hall floor at the bottom of your stairs with the back touching the wall. Unlike residential stairs per the IRC, where the width is just a given measurement, commercial stair width per the IBC is based on capacity. Headroom for Loft Conversions : For loft conversions the available headroom will comply with the building regulations provided that the height at the centre of the stair width is at least 1.9 metres, reducing to a minimum of 1.8 metres at the side of the stairs. However the recommended minimal with should be between 800mm and 1000 mm, to allow not only to only climb that staircase with comfort but you can actually bring something up on it. Download. The width of one stair, after all, will need to be consistent with the rest of the stairs. Headroom: Headroom is the vertical dimension from the stair treads to the ceiling directly above. There is no need for handrails beside the bottom two steps of a stairway. Going Maximum Outer Going: Category A – Small Private Stair. The minimum length of a stair landing, measured on the centreline of travel, should be either 1.2m or the effective width of the stair, whichever is less. Keep in mind, the minimum clear width is typically 44″, but it is sometimes reduced to 36″ for low-capacity floors. Good news, though there are many rules surrounding staircases, there’s no strict minimum on the width your staircase can be. Minimum domestic handrail heights of 900mm for both stairs and landings, public handrail heights should be a minimum of 900mm on stairs and 1100mm on landings. An 'alternate tread' stair is illustrated below, space is saved by the pitch angle being greater than 42°. There are various types of stair lifts made for different staircases. Secondary domestic stair intended to be used by a limited number of people who are generally familiar with the stair: 600mm – typical minimum diameter 1500mm: 170-220mm: 120mm: 145mm: 350mm : Category B – Main Private Stair. The default safe standard to work to for private and public stairs is 1 metre unobstructed width, measured between handrails (or walls, where there are no handrails.) There must be a minimum of 2000 mm headroom at every … These sizes ignore intrusions like stringers, skirting and newels. NCC Part 3.9.1 – Staircase Construction. The minimum width of stairs for the different types of buildings is shown in the table above. In order to determine this the code refers us to Section 1005.1, but before we look at this section the code does say that the minimum width shall not be less than 44 inches. Width and height. This is with the provisos that the total door width should be: a) not less than the aggregate of … We offer two diameters of spiral stairs, 1400mm and 1600mm. At pp 82/83, the document notes that the minimum door widths according to risk profile and when minimum fire protection measures are provided are as given in the table below. he minimum width of stair tread that most standard size stairlifts can be fitted to is 73cm (29 inches). 1 of 4. 1009.10 Alternating Tread Devices. Minimum going of a private stair is 225 mm in Scotland, vs 220 mm in England; Maximum rise of a public stair is 170 mm in Scotland, vs 190 mm in England; Width. Fig 1: Staircase Width. Height: Width: Depth: Length: Weight: Select an item from the list on the right to compare related dimensions.
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