Basement Stairs Building Regulations
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However if the steps do not have nosings and the steps have solid risers not open risers the minimum tread depth is 11 inches.
Basement stairs building regulations. Comprehensive guidance on all building regulations related to basement construction is provided by the TBIC Guidance Document. When planning new basements for housing particular attention is required to the provision of fire separation between the basement and ground floor a fire escape from the basement and disabled access and entrance. They cover areas such as fire escape routes ventilation ceiling height damp proofing electrical wiring and water supplies.
Minimum width below handrail is 31-12-inches. Basement conversions require a Building Regulation application ie. A Full Plans Application or Building Notice submission where the intention is to provide.
Stairway Basement stairs shall be provided with a means to light the treads and landings of the stairs. For most staircases the building regulations require that the centre of the staircase dimension A must be equal in length and also be the same as or larger than the dimension of the going on the straight flight of the staircase B. Vi The access to the basement shall be either from the main or alternate staircase providing access to the building.
Stairways shall be not less than 36 inches 914 mm in clear width at all points above the permitted handrail height and below the required headroom height. If a building does not meet the criteria of paragraph 328 an escape stair forming part of the only escape route from an upper storey should not continue down to serve a basement storey. There shall be a switch to the light at the top and bottom of the stairs on stairs with 6 risers or more.
Minimum head clearance from the nosing of the stair treads to the finished ceiling shall not be less than 6. This is to prevent damp and water entering the structure of your conversion and reaching the rest of your house. Staircase risers should be adequately deep to allow a majority of your foot to have enough room to rest on the stair.
Code below requires minimum 36-inch width above handrail and below headroom height. Building regulations for cellars and basements state that all floors and walls that are below ground level need to be waterproofed. The enclosure walls of an internal exit staircase excluding the final discharge shall not have more than two exit doors opening into the exit staircase shaft at each storey.
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