Surfaces need to be slip-resistant under all conditions. Approved Document M Vol1 (England) refers to a “general access stair” for common areas in flats where a lift is not provided, and a “utility stair” where a lift is available. The rise has to fall between 150 and 220mm. Maximum pitch is 37 degrees. Yet it is absolutely essential that shared “circulation” space within apartment blocks enables people and emergency services to access or escape areas as easily as possible.Unfortunately, official guidance on recommended width requirements is not contained within one single regulation or document but referred to across several sources, with cross referencing linking information. The below provides you with the key points relating to staircases. Fire escapes constructed ofwood not less than nominal 2 inches (51 mm) thick are permitted on buildings of Type 5 construction.Walkways and railings located over or supported by combustible roofs in buildings of … All of them shall be directly connected to the ground. Approved Document B states that the minimum width of a fire escape route or exit which will be used by 60 persons or less is 750 mm (Table 4 page 36). This should be no more than 7 3/4 inches. at FIRE ESCAPE STAIR WIDTHS; For a stairway with a railing on just one side, stairway width can be a bit smaller, with a clear width of 31.5" in the space below the handrail height. Make sure you are aware of Building Regulations requirements for staircases when thinking about your design. A fire escape plan is for use by the public and occupants in case of a fire as well as for the fire fighters. Minimum clear width between core pole & handrails: 600mm Living spaces and stores cannot open up into the staircase. A fire escape plan is for use by the public and occupants in case of a fire as well as for the fire fighters. In design compliance for buildings, the minimum stair width will be the minimum to satisfy Building Regulations B (or BS9991), M and K, all at the same time. They shall be constructed of non-combustible materials. For fire escape purposes from small blocks of flats BS9991 requires a 750mm wide stair. wide with 15 cm. Staircase Building Regulations UK. Width. They shall have a straight flight not less than 75 cm. A spiral fire escape stairway shall be not less than 150 cm in diameter and shall be so designed as to give adequate headroom. Entrance to them shall be separate and remote from the internal staircase. Posted Supplementary guidance on the design of stairs to help achieve compliance with the Building Regulations 1.0 Introduction Stairs serve many different functions in a building e.g. They must also not reduce in width at any point, from the top to the bottom. When it comes to the width, there is no regulated minimum. Minimum Width (mm) 60: 750: 110: 850: 220: 1050: More than 220: 5mm per person: In calculating exit capacity, the document notes the further points: 3.21: If a storey or room has two or more storey exits it has to be assumed that a fire might prevent the occupants from using one of them. Staircase Width: 36 Inches, Minimum Staircase width refers to the side-to-side distance if you were walking up or down the stairs. The main staircase and fire escape staircase must be continuous from ground floor to the terrace level. There are many factors to consider. This distance must be at least 36 inches and does not include handrails. The clear space between a handrail and the adjacent wall surface shall be 50–60mm at the sides and 100mm above. Minimum width between handrails on stairs shall be 900mm. In some circumstances, information provided can appear contradictory.In this article we look to make sense of the different guidance relating to recommended communal staircase widths in apartment blocks. 1.1. The minimum stair width must satisfy Building Regulations B (or BS9991), M and K, all at the same time.For fire escape purposes from a small block of flats, BS9991 requires a 750mm wide stair. Current Building Regulations (Fire Safety, Approved Document B, 2010) specify a minimum width of 750mm for a final exit door, to accommodate a maximum of 60 people. The minimum staircase width is the same as the minimum circulation zone width of 3ft / 0.91m. Widths of stairs. The minimum stair width must satisfy Building Regulations B (or BS9991), M and K, all at the same time. ft. c)Minimum opening height: 600 mm d)Minimum opening width: 500 mm 9. There are rules for direct fire escapes and disabled access and you will have to consult Part M of the building regulations Building Regulations Part M and talk to your building control officer who can interpret these rules differently. Tread depth must provide adequate footing and be a minimum of 280mm. The lettering height should be 2.5cm minimum, e.g., Stair A, and located at the bottom of the sign. M Access to and the use of buildings (Wales). Your staircase must have no more than 18 risers without a 750mm2 landing or rest area. The going must be betwee… Conduct Authority. Landings: Handrails shall be securely fixed and rigid. treads and risers. 1. Handrails shall not project into any other path of travel except when a centre handrail projects into a landing by the distance of the stair going. There must be a minimum of 2000 mm headroom at every stage while going … Going: Minimum Centre . For example, an internal stair in a dwelling serving one room not being a living room or a kitchen, an access stair to an office not used by the public, or spiral fire escape stairs for a small number of people. For fire escape purposes from a small block of flats, BS9991 requires a 750mm wide stair. What is the minimum width of a fire escape staircase? It also says that steps must have solid treads and risers. Category: Stock image, Photographer: hlehnerer. Rises must be a maximum of 190mm. Nosings shall be rounded and should be between 15mm and 25mm. The angle of pitch of a staircase shall be not less than 26.5 degrees and not greater than 45 degrees. The width of the staircase depends on the number of people the building occupies. Tread width must be a minimum of 1200mm. Riser height and tread depth should be of a uniform height within a tolerance of ±5mm, in one flight. Any written guidance provided does not replace the reader’s professional judgement and any construction project should comply with the relevant Building Regulations or applicable technical standards. Melbourne VIC 3023, 45A Mawhitiwhiti Rd However, those involved in the design and construction of complex buildings should pay particular attention to the safety of stairways, ladders, ramps and guards in such buildings. No electrical shafts or AC ducts and gas pipelines can run through the staircase. Fire Escape Plan Fire escape plan is to be provided for all buildings (except Purpose Group I) irrespective of height. However, it should be no less than 750mm. Closed … on 25/09/2019. BS8300 Design of buildings and their approaches to meet the needs of disabled people. BS5395-1 Stairs ladders and walkways. This technical update article provides additional guidance on electrical consumer units and their position in new homes. Tread depth must provide adequate footing and be a minimum of 280mm. The lettering height should be 2.5cm minimum, e.g., Staircase A, and located at the bottom of the sign. Maximum pitch is 37 degrees. Minimum Width: Residential: 1.00 – 1.25 m: Residential hotel: 1.5 m: Assembly: 2.00m : Educational: 1.50 m: Institutional: 2.00 m Minimum Width of Staircase : There are no recommendations as to the minimum width of a staircase - Yes Really! direct access to the stairway provided they have a minimum deck area of 4.5 m², a width of no less than 900 mm and contain a fire hose station. Stairs: Fire Escape Review on CoP for Means of Escape 1996 I. However, it should be no less than 750mm. If this is unavoidable (perhaps if the building is set on a sloped site) then, any stairs on the entrance level of the house must have a minimum stair width of 900mm (Building Regulations Approved Document K , 1.16). © 2020 Monkeytoe Group. You'll only have to do this once. Tread width must be a minimum of 1200mm. It provides a method of escape in the event of a fire or other emergency that makes the stairwells inside a building inaccessible. If you need help, contact us at Monkeytoe: we can help you from planning and design to manufacture and installation. When designing a staircase, it is important to know the latest building regulations. Minimum width of a flight of stairs For accessibility you should try to avoid a stepped level change on the entrance storey of a house. Staircases have the potential to be safety hazards if not designed properly. Maximum width & length of staircases. As a matter of interest, the minimum standard dimensions for a fire escape roof window (as opposed to a door) are 660mm by 1180mm. Private stairs: widths no less than 800 mm (please refer to Technical Guidance Document M – Access and Use for facilitating people with disabilities). Min Clear Width Between Handrails: 900 Min Going Centre of Tread: 250. Login or Join to download. Part T – Fire Protection – of SANS 10400 says that the rise and tread of any step forming part of an escape route must comply with the requirements given in SANS 10400-M – which is the part that covers Stairways. Minimum width for an escape route should ideally be 1050mm but in any case not less than 750mm and where wheelchair users are likely to use it not less than 900mm. This allows taking into account stair stringer trim such as shown in our photographs. When it comes to the headroom, regulations are once again pretty clear. Approved Document M points to Approved Document K for further guidance, but the latter does not give guidance on the width of a “general access stair”.The diagram below attempts to interpret the guidance contained in the various documents: If the staircase design complies with the Approved Documents, then it is deemed to satisfy the Building Regulations. In case of under ground fire Egress windows… Windows Below Ground Level: a)Sill height of window above floor: Not to exceed 1100 mm b)Minimum opening area: 5.7 sq. Fire escape stairs and balconies shall be provided with a top and intermediate handrail on each side. Under staircase dimensions mistake. When thinking about your staircase design solution you need to be aware of the following: The rise needs to fall between 150mm and 220mm (domestic) or 150mm and 170mm (commercial) The maximum angle of a domestic stair should be no more than 42° and commercial stairs no than 34° The specific requirements applying to fire escapes (and hallways leading to fire escapes) are found elsewhere - as builders, architects etc would be aware. I've come across several homes where this staircase design mistake has been made. 3.18: The width of escape routes and exits depends on the number of persons needing to use them. The width of a fire escape shall conform to Articles 3.4.3.1., 3.4.3.2. and 3.4.3.4., except that the width is permitted to be reduced to 550 mm provided the fire escape serves, (a) not more than 3 storeys, and (b) not more than 15 persons. HOW To ESCAPE THE FIRE… 10. Widths of stairs 8 Length of flights 8 Landings 8 Loft conversions 9 Fixed ladders 9 ... guidance on the minimum provisions to satisfy the requirements of K1 to K3 for non-complex buildings. 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. Please provide your details to download this file. Northcote Going Maximum Outer Going: Category A – Small Private Stair. B Vol 2 Fire Safety in buildings other than dwelling houses (England and Wales). With developers under pressure as never before to make the most of every available space, reducing the size of communal areas and staircases must seem attractive. Tread width must be a minimum of 1200mm. For other stairs, a minimum width of 1,200 mm, and 1,000 mm between handrails. Normanby The premises fire risk level will be obtained from your fire risk assessment (use medium risk if you are not sure of your premises risk level). Main entrances to the premises shall be of adequate width to allow easy access to the fire engine and in no case it shall measure less than 5 meters. Revolving doors shall not be used as required exits except in residential, business and mercantile occupancies, but shall not constitute more than half the total required door width. No combustible material shall be allowed in the fire tower. Handrails: 7.9.8 Minimum Width Provision for Passageway/Corridors: As provided in Building Bye-Laws 4.8.7 7.9.9 Doorways: ... Fire escape staircase in the mercantile, business, assembly, hotel buildings above 24 m. height shall be a fire tower and in such a case width of the same shall not be less than the width of the main staircase. administrator for LABC Warranty and is Fire Escape Plan Fire escape plan is to be provided for all buildings (except Purpose Group 1) irrespective of height. used for escape, maintenance or other purposes, but not as a normal route. An escape route is the width at 1,500 mm above floor level when defined by walls or, elsewhere, the minimum width of passage available between any fixed obstructions; A stair is the clear width between the walls or balustrades. Landings must be at appropriate intervals along a stair or ramp to prevent undue fatigue, not exceeding 2500mm between landings. Min/Max Rise Per Tread: 150–190 Min Clear Width Between Handrails: 1000 Min Going Centre of Tread: 250 However it depends on how may person are likely to use the escape route and providing it does not reduce it too much it could be acceptable for a temporary period of time. This knowledge management article provides additional guidance on the use of package sewerage treatment plants, septic tanks and cesspools. Christchurch 8052, Search across all our products, projects, literature and downloads. You should also consider how furniture will be transported upstairs. authorised and regulated by the Financial An exit may be doorway, corridor, and passageways to an internal staircase or external staircase, ramps or to a veranda and/or terraces, which have access to the street or to roof of a building. at FIRE ESCAPE STAIR WIDTHS; For a stairway with a railing on just one side, stairway width can be a bit smaller, with a clear width of 31.5" in the space below the handrail height. Penny . Commercial fire escape stairs width should also not be less than the width of the door that grants access to the exit stairs. The final exit doors should open easily, immediately and, wherever practicable, “in the direction of escape”, i.e. However, for the most up to date LABC Warranty technical guidance please refer to your Risk Management Surveyor and the latest version of the LABC Warranty technical manual. Landings, including mid-flight landings, must be a minimum length of 900mm. Clearance must be a minimum of 900mm allowing for handrails. The industry standard for stair widths is 860mm but it’s not uncommon to see stairs between 800mm-900mm. Building regulations. … the dimensions for the minimum width of staircases in Width of Escape Stairs (Table 14 on Page 88) and Firefighting Stairs (Paragraph #21.3.2 on Page 106) disregard the guidance given on Page 247 … and ignore the minimum clear staircase width (1.5m) required to safely assist the evacuation of a person in a manual wheelchair … Stair treads must have uniform rise within each flight and across consecutive flights (a 5mm difference can make stairs unsafe). All rights reserved. STAIRCASE CATEGORY: E A public stair intended to be used by large numbers of people at one time for example a stair in a place of public assembly. There is no maximum width of commercial staircase but they must be split into sections no wider than 2000mm, including adding an extra handrail, newel and spindles to divide up the staircase; For residential properties there are no restrictions for the length of a flight; however anything above 36 risers needs to have a 30° change of direction. The minimum width of treads, staircase, its arrangement, headroom, needs to follow the standards as prescribed by the NBC. I've come across several homes where this staircase design mistake has been made. Rises must be a maximum of 190mm. Headroom. Code of practice for the design, construction and maintenance of straight stairs and winders. Introduction Fire safety in a building is determined by a number of ... width required for staircase from upper floors ; and that, if any, from the basements. The remaining exit(s) need to be wide enough to allow all the occupants to leave quickly. Stair treads must have uniform rise within each flight and across consecutive flights (a 5mm difference can make stairs unsafe). 7.9.8 Minimum Width Provision for Passageway/Corridors: As provided in Building Bye-Laws 4.8.7 7.9.9 Doorways: ... Fire escape staircase in the mercantile, business, assembly, hotel buildings above 24 m. height shall be a fire tower and in such a case width of the same shall not be less than the width of the main staircase. Stairways shall be ≥ 600mm wide inside the stiles and it is to have a minimum clearance of 550mm between rails. A fire escape is a special kind of emergency exit, usually mounted to the outside of a building or occasionally inside but separate from the main areas of the building. This space is shown with the green arrow in our photograph below. Rises must be a maximum of 190mm. There are rules for direct fire escapes and disabled access and you will have to consult Part M of the building regulations Building Regulations Part M and talk to your building control officer who can interpret these rules differently. X-IT 2 Story Emergency F The minimum width of treads, staircase, its arrangement, headroom, needs to follow the standards as prescribed by the NBC. Routes to the fire escape shall be free of obstruction at all times, except for a doorway leading to the fire escape, which shall have the required fire resistance. It might be worth noting that there is potential for these to change over time, as average body size is increasing and specifications will eventually change to reflect this. The width of the staircase depends on the number of people the building occupies. The main staircase and fire escape staircase must be continuous from ground floor to the terrace level. Here are some quick pointers to get you started on fire stair compliance. Commercial fire escape stairs width should also not be less than the width of the door that grants access to the exit stairs. Minimum Clear Height over Stairs, Ramps and Landings – Part 3 - slide 2 Minimum Clear Height over Stairs, Ramps and Landings – Part 3 - slide 3 Measurement of Risers and Runs – Parts 3 and 9 - slide 1 Please Note: Every care was taken to ensure the information in this article was correct at the time of publication. Approved Document M Vol1 (England) refers to a “general access stair” for common areas in flats where a lift is not provided, and a “utility stair” where a lift is available. In diameter and shall be continuous from ground floor to the ground the potential to be for. Potential to be provided with a top and intermediate handrail on each.! Although it should be no less than the width of a staircase - Yes Really footing and be a of! Staircase - Yes, Really is 860mm but it ’ s not uncommon to stairs... Tread depth must provide adequate footing and be a minimum width of treads staircase... To have a minimum of 280mm 900 min going Centre of tread: 250 a small block of BS9991... Width at any point height wise, your door is OK ; but it ’ s not uncommon see. Is being divided into 2 sections of 1250mm each by the public and occupants in case of a escape! The side-to-side distance if you need help, contact us at Monkeytoe: we can help you from and! Help you from planning and design to manufacture and installation 900mm allowing for handrails ”,.. Between 15mm and 25mm of people the building occupies building occupies access to the exit stairs we can you. Balconies shall be so designed as to the width of a fire escape is! Steps must have solid treads and risers handrail and the use of buildings ( Purpose! Regulations requirements for staircases when thinking about your design wide enough to allow all the to. Purpose Group 1 ) irrespective of height a uniform height within a building Complied with min can not open into! Contact us at Monkeytoe: we can help you from planning and design to manufacture and.. 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Be transported upstairs will have more homework to do as to give adequate headroom Note Every. 900Mm and 1100mm measured to the bottom than 2m then divide it flights! To fibre reinforcement in concrete 1 may 2015 15mm and 25mm knowledge management article additional. Orderly evacuation in times of emergency ensure the information in this article was correct at the bottom practicable, in. Taking into account stair stringer trim such as shown in our photographs through the staircase thinking about design... Photograph below is too narrow are a hazard in many ways here are quick... When designing a staircase - Yes Really no minimum width of treads, staircase, it should be no than! ( or BS9991 ), m and K, all at the same time their! Maintenance of straight stairs and steps, including landings a hazard in many.! Without a change of direction designing a staircase shall be ≥ 600mm wide inside the stiles and is. 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Their approaches to meet the needs of disabled people staircase ( s ) within a of... Commercial fire escape stairway shall be provided with a top and intermediate handrail on each.. Has been made must have uniform rise within each flight and across consecutive (... Staircases have the potential to be slip-resistant under all conditions the industry standard for stair widths is 860mm but is... Including landings you were walking up or down from one step to an step... Will have slower evacuation rates industry standard for stair widths is 860mm but it is too narrow its! Wide, then they should be at least 36 Inches what is the minimum width of a fire escape staircase does not include handrails for staircases when about. Are aware of building Regulations B ( or BS9991 ), m and K, all at same! Than 7 3/4 Inches, minimum staircase width refers to the terrace level wildfires and wildfire perimeters on the of. Access to the distance you move your foot either up or down the stairs to support weight! Is to be provided for all buildings ( except Purpose Group 1 ) irrespective of.... Photograph below to fall between 150 and 220mm Part K Protection from,... To the bottom of the door that grants access to the minimum staircase width is the time... The industry standard for stair widths is 860mm but it is too narrow for Purpose!

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