the tread’s leading edge. 01952 608853 Plan Layouts There are special concessions for lofts, where Space Saving Stairs (or Alternating Tread Stairs can be used). Series. Next Up In Stairs. A Alternating Tread Staircase should only be used in a Loft conversion where the staircase serves only 1 habitable room, togerther with if desired a bathroom … The following drawings are included: the working triangle; stringer detail and tread detail. All ErectaStep stairs comply with OSHA standard 1910.25 which covers all stairways including standard, spiral, ship, and alternating tread-type stairs. 2. Alternating Tread Staircases save space by having a alternating tread design with part of the tread cut away. The information below is intended to be used as a guide ONLY and specifically tailored for Building Class 1 & 10. Domestic staircases shouldn’t be more than 36 steps long; another staircase must be installed separated by a landing if you need more length. You just have to remember to start out on the correct foot when you start climbing the stairs. On that part of a flight consisting of tapered treads, the going of the tapered treads should be uniform and should not be less than the going of the straight treads. Stairs of such shaped treads were of a design which had not previously been used in the UK to any great extent. To do this, there are many parameters and measurements you need to factor in to your calculations. Building Regulations for Staircases in England & Wales . Make sure you are aware of Building Regulations requirements for staircases when thinking about your design. These have to have minimum 2 meters headroom and have non-slip coatings, among other requirements. 3. The appeal . However, a basic straight flight of stairs is easier to design and construct than one with landings or winders. Building Regulations Document K As we only supply the staircase the responsability for meeting the other requirments lies with the customer. Two pictures are included of finished lapeyre stairs, one of wood and one of steel. Spiral stairs. Alternating tread stairs are the safest and most comfortable space saving stairs for industrial and commercial applications. They generally limit alternate-tread stairs to use for access to lofts and mezzanines, if they address them at all. The distance between treads on a given side of an alternating-tread stair is actually twice the unit rise, which gives you more free tread area and therefore a safer stair in theory. (4) Alternating tread stairs, meeting the requirements of 3234(i) shall be permitted for: (A) Limited usage. For building work relating to requirement K1 of the Building Regulations, regarding the design of stairs, ladders and ramps, see regulation 17 of the Workplace (Health, Safety and Welfare) Regulations 1992. The Spacesaver staircases we produce are designed to meet the UK buiding regulations Part K sections 1.22 to 1.24 for Alternating tread Staircases. Alternating tread stairs S have alternating tread steps, with adjustable height, to provide access between the two floors (the same max height as T8 mezzanine). Winder treads shall have a minimum tread depth of 11 inches (279 mm) measured at a right angle to the tread’s leading edge at a point 12 inches (305 mm) from the side where the treads are narrower and a minimum tread depth of 10 inches (254 mm). Alternating Tread or Space Saving Stairs. Staircases have the potential to be safety hazards if not designed properly. Scottish Building Regulations. This external spiral staircase is made with fully galvanised steel and features non-slip perforated treads and steel spindles. Closed risers. 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