Stair & Staircase Regulations
The most important dimension Pear Stairs need is a measurement from the Finished Floor to Finished Floor. (See Home Page, "who measures your staircase").
We will then provide you with all the drawings you need once you have agreed to purchase the staircase. Pear Stairs will check your stair & staircase building regulations and will ensure you don’t fall foul of the regulations.
If you want to be involved in the building regulations then read on:
Building Regulations Steepness of Stairs
ALL steps must have the same rise. You cannot have 200mm for the first three risers and 205mm for the remainder.
However if there is a flat landing between a staircase it can be interpreted that you can have a different rise and going on the bottom flight to the top. Pear Stairs do not recommend this practice. It is not considered excellent practice.
For the actual stair & staircase building regulation for this issue go to point 1.1 (Page 6) Building Regulations Part K .
Categories under the Staircase Building Regulations
The staircase building regulations consider three categories.
Private Staircase - for a domestic property.
Institutional & Assembly Stairs - are for serving a place where a substantial number of people will gather.
Other - are defined as offices, disabled, factories and common stairs
serving more than one dwelling. (Semi Public Staircase).
For the actual stair & staircase building regulation for this issue go to Point 1.2 (Page 6) at Building Regulations Part K.
The Rise And Going.
The most important regulation regarding domestic staircases is that:
1. Maximum rise of staircase 220mm.
Minimum going of staircase 220mm.
Private Staircase (Domestic) Max Rise = 220mm, min going 220mm. Private Staircase (Domestic)
Institutional & Assembly Max Rise = 180mm, min going 280mm.
Other (Semi Public) Max Rise = 190mm, min going 250mm.
2. The maximum pitch of a domestic property is 42°
= 42° Maximum. Institutional & Assembly Stairs (Public)
= 33° Maximum. Other (Semi Public)
= 38° Maximum.
3. Please Note that your stair tread cannot be too long or the riser too short because building regulations
Twice the rise plus the going (2R+G) should be between 550mm and 700mm. For the actual stair & staircase building regulation regarding categories for steepness of stairs go to 1.3; 1.4; 1.5; & 1.6 (Page 6) at Building Regulations Part K
Construction of Steps.
Building regulations stipulate that staircase steps should be level. Nosings should be at least 16mm.
For the actual stair & staircase building regulation regarding construction of steps go to point 1.8 (Page 6) at Building Regulations Part K
All stairs which have open risers should be constructed so that a 100mm sphere cannot pass through.
This regulation has been stipulated by the government in order that children’s heads cannot get stuck in any opening. For the actual stair & staircase building regulation regarding Open risers go to point 1.9 (Page 6) at Building Regulations Part K
A headroom of 2m is required at all points on and off a staircase and as you pass down a staircase.
For the actual stair and staircase building regulation regarding Headroom go to point 1.10 (Page 7) Building Regulations Part K
Headroom for Loft Conversions.
For loft conversions the headroom will pass the building regulations if the centre of the stair width is 1.9m reducing to 1.8m at the side of the stair.
Please Note where there are real difficulties in the height some building control officers will allow you to build a newel out from the wall to meet the regulations. This does make the staircase narrower but this may be the only option.
For the actual stair and staircase building regulation regarding Headroom go to point 1.10 (Page 7) at Building Regulations Part K.
Minimum Width of Staircase.
There are no recommendations as to the width of a staircase - Yes Really!
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.
However Pear Stairs recommend: To make a staircase visually pleasing and comfortable we would recommend that you don’t try to have a staircase narrower than 860mm overall string.
For the actual stair and staircase building regulation regarding minimum width of staircase go to point 1.11 (Page 7) at Building Regulations Part K
Maximum Width of Staircase.
The maximum width of a public staircase is 1800mm. However this is easily overcome by putting an additional handrail, newel and spindles in the staircase.
For the actual stair and staircase building regulation regarding maximum width of staircase go to point 1.12 (Page 7) at Building Regulations Part K.
1. Landings must be provided at the top and bottom of every stairs.
2. The landing distance in front of the top and bottom step must be wider than the width of the staircase.
3. No door should swing closer than 400mm on to the front of any step.
4. All landings should be level other than the ground floor level which can have a gradient but not exceeding 1:20.
Landings Next To Doors.
For the detailed stair and staircase building regulation regarding landings go to point 1.15 (Page 7) at Building Regulations Part K, point 1.16 (Page 7) at Building Regulations Part K and point 1.17 (Page 8) at Building Regulations Part K .
Length of Staircase.
For domestic properties there are no restrictions as to the length of a flight up to 36 risers.
For public buildings such as a shop for assembly purposes then the number of risers are restricted to 16. Above 36 risers there should be a change of direction of at least 30°. For the detailed stair and staircase building regulations, regarding length of flight go to points 1.13 & 1.14 (Page 7) at Building Regulations Part K.
Stairs That Turn Direction.
For most staircases the building regulations require the centre of the staircase dimension “A” above must be equal length and also be the same or bigger than the dimension as the going on the straight flight of the staircase “B”. If the staircase is wider than 1000mm then seek Pear Stairs help. For the actual stair and staircase building regulation regarding winder boxes go to point 1.18 (Page 8) at Building Regulations Part K.
Space Saver Staircases (Alternating tread stairs).
These are staircases that break the rule of “a maximum pitch of 42°”
The use of these staircases are quite often interpreted differently by different building Inspectors, they do not like their use. The building regulation rules state that they can be used to a single room only if there is no other alternative.
The maximum rise is 220mm and minimum going is 220mm. For the actual stair and staircase building regulation regarding space saver staircases (Alternating tread stairs) go to points 1.23 & 1.24 (Page 9) at Building Regulations Part K
Handrails for staircases.
Stairs should have a handrail on at least one side if they are less than 1m wide. They should have a handrail on both sides if they are wider. You do not need a handrail on the first two steps up.
In all the buildings handrail height should be between 900mm and 1000mm measured to the top of the handrail to the pitch line.
A 100mm sphere cannot pass through any openings.
For the actual stair and staircase building regulation regarding Handrails go to 1.27, 1.28, 1.29 (Page 9) at Building Regulations Part K.
Staircase Building Regulations are covered by further regulations parts M1 and M2.
Building inspectors are now asking for no nosings on staircases for offices or with disabled access. (Pear Stairs have been making more of these this last year).
They are also asking for no open risers for offices.
The rise should be between 150mm and 170mm and going between 250mm and 450mm. Some building inspectors are avoiding any steps into a building and are insisting on ramps. Please check with building inspector.
For the actual stair and staircase building regulation regarding Offices and Disabled building access go to points J (Page 23) plus L, M and N (Page 24) at Building Regulations Part M.
Pears Stairs are able to assist you with any staircase regulation questions you have, please don't hesitate to contact us we are a very friendly company. Phone Pear Stairs on 01938 553311.