Commercial Spiral Staircase Regulations
Camila Farah
Minimum headroom is generally 2 metres.
In k1 section 1 21 spiral and helical stairs the regulations refer you to a british standard bs5395 2 1984. Spiral staircase regulations for commercial and public use category c small semi public d semi public or e public stairs tend to be for staircase projects in commercial and public spaces. Landing width shall not be less than the required staircase width. Flights can be connected using landings.
Headroom minimum of 6 6 riser height cannot exceed 9 1 2. Closed baluster width with a 32mm round handrail in an easy grip pvc covering ensures no unsightly segment joins allowing for a smooth free flowing handrail. A commercial spiral staircase features a small footprint while still meeting all of the building code requirements necessary. Spiral stair building code compliance.
Tread path between handrail and center column a minimum 26 center tread width 7 1 2 in from the narrow end of the tread d. Minimum spiral stair tread width is 26 inches salter s code platforms start at 31 inches wide. Commercial spiral staircases when leasing or owning a commercial space there are two major goals. A barrier a landing 2 metres in length or a change in the direction of the stairway of 90 degrees needs to take place every 36 stairs.
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It is important to note that where there is a contradiction between bs 5395 part ii and part b and m of the building regulations part b and m take precedence. All spiral staircases must have a handrail on the outer edge of the staircase and the handrail must be between 34 and 38 inches above the stair treads. K1 building regulations is the approved document which covers stairs ladders and ramps. General guidance on staircase design is contained within the new approval document part k 2013.
Part 1 bs5395 part 3 bs 5960 part 5 and others british standards. Staircases must slope at an angle of 20 to 45 but between 30 and 38 is recommended. If your spiral staircase complies with bs5395 then it also complies with k1 building regs. Paragon provides spiral staircases for a broad number of needs both residential and commercial.
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