[{"data":1,"prerenderedAt":120},["ShallowReactive",2],{"pages:en":3,"type:en:wood-u":89},{"home":4,"types":8},{"title":5,"description":6,"h1":7},"Free 3D Stair Calculator with DXF Drawings | StairGen Pro","Free stair calculator for 16 stair types: steel, wood, spiral and concrete. Rise, run, stringers, comfort and code check, live 3D and DXF for AutoCAD.","Stair Calculator with 3D Model and DXF Shop Drawings",{"metal-straight":9,"metal-straight-toothed":14,"metal-l":19,"metal-l-toothed":24,"metal-u":29,"metal-u-toothed":34,"spiral":39,"wood-straight":44,"wood-cut":49,"wood-l":54,"wood-l-winder":59,"wood-u":64,"wood-u-winder":69,"wood-three":74,"wood-three-winder":79,"concrete":84},{"slug":10,"title":11,"description":12,"h1":13},"steel-stair-calculator","Steel Stair Calculator: 3D Model & DXF Shop Drawings","Design a straight steel stair with stringer and tread brackets. Get rise, run, bracket spacing, cut list and fabrication drawings in DXF for AutoCAD.","Steel Stair Calculator with Fabrication Drawings",{"slug":15,"title":16,"description":17,"h1":18},"sawtooth-steel-stringer-stair-calculator","Sawtooth Steel Stringer Stair Calculator | 3D + DXF","Calculate a straight steel stair with sawtooth (cut) stringers: rise, run, stringer layout and plate cuts, with a live 3D model and DXF shop drawings.","Steel Stair Calculator with Sawtooth Stringers",{"slug":20,"title":21,"description":22,"h1":23},"l-shaped-steel-stair-calculator","L-Shaped Steel Stair Calculator with Landing | DXF","Quarter-turn steel stair with landing: split risers between flights, check comfort and slope, see it in 3D and download dimensioned DXF drawings.","L-Shaped Steel Stair Calculator with Landing",{"slug":25,"title":26,"description":27,"h1":28},"l-shaped-sawtooth-steel-stair-calculator","L-Shaped Steel Stair Calculator: Sawtooth Stringers","L-shaped steel stair with sawtooth stringers and a square landing. Rise, run, stringer cuts and bill of materials, with 3D view and DXF for AutoCAD.","L-Shaped Steel Stair with Sawtooth Stringers",{"slug":30,"title":31,"description":32,"h1":33},"u-shaped-steel-stair-calculator","U-Shaped Steel Stair Calculator | Switchback + DXF","Half-turn (switchback) steel stair with a full-width landing. Calculate both flights, check comfort and export fabrication drawings to DXF.","U-Shaped Steel Stair Calculator (Switchback)",{"slug":35,"title":36,"description":37,"h1":38},"u-shaped-sawtooth-steel-stair-calculator","U-Shaped Steel Stair Calculator: Sawtooth Stringers","Switchback steel stair with sawtooth stringers: flight split, landing size, stringer cuts and cut list, with live 3D and DXF shop drawings.","U-Shaped Steel Stair with Sawtooth Stringers",{"slug":40,"title":41,"description":42,"h1":43},"spiral-staircase-calculator","Spiral Staircase Calculator: 3D, Dimensions & DXF","Spiral stair calculator: number of steps, rise, tread angle and walkline going from height and diameter. Live 3D and DXF drawings, free.","Spiral Staircase Calculator",{"slug":45,"title":46,"description":47,"h1":48},"wooden-stair-calculator","Wooden Stair Calculator: Closed Stringer, 3D & DXF","Straight wooden stair with housed (closed) stringers: rise, run, stringer board width and length, comfort check, 3D model and DXF for AutoCAD.","Wooden Stair Calculator (Closed Stringers)",{"slug":50,"title":51,"description":52,"h1":53},"stair-stringer-calculator","Stair Stringer Calculator with Diagram | 3D + DXF","Cut stringer calculator: risers, treads, stringer length, board size and layout diagram from your total rise and run. Free, with 3D and DXF template.","Stair Stringer Calculator (Cut Stringers)",{"slug":55,"title":56,"description":57,"h1":58},"l-shaped-stair-calculator","L-Shaped Stair Calculator with Landing | 3D + DXF","Quarter-turn stair calculator: total rise split over two flights, landing size, stringer lengths and comfort check, with live 3D and DXF drawings.","L-Shaped Stair Calculator with Landing",{"slug":60,"title":61,"description":62,"h1":63},"winder-stair-calculator","Winder Stair Calculator: L-Shaped Kite Winders | 3D","Plan a quarter-turn winder stair: winder angles, tread going, stringers and comfort check. 3D model and DXF drawings.","Winder Stair Calculator (90° L-Shaped Winders)",{"slug":65,"title":66,"description":67,"h1":68},"u-shaped-stair-calculator","U-Shaped Stair Calculator with Landing | 3D + DXF","Half-turn (switchback) stair calculator: risers per flight, landing width, stringer lengths and stairwell size, with live 3D and DXF drawings.","U-Shaped Stair Calculator with Landing",{"slug":70,"title":71,"description":72,"h1":73},"u-shaped-winder-stair-calculator","U-Shaped Winder Stair Calculator (180° Turn) | 3D","Half-turn winder stair around a newel: winder angles, walkline going, stringers and comfort check, with a live 3D model and DXF shop drawings.","U-Shaped Winder Stair Calculator (180° Winders)",{"slug":75,"title":76,"description":77,"h1":78},"three-flight-stair-calculator","Three-Flight Stair Calculator with Two Landings | 3D","Three-flight (three-quarter turn) stair with two quarter landings: flight split, landing sizes, stringers and comfort check, in 3D and DXF.","Three-Flight Stair Calculator with Two Landings",{"slug":80,"title":81,"description":82,"h1":83},"double-winder-stair-calculator","Double Winder Staircase Calculator | 3D + DXF","Three-flight stair with two 90° winder turns: winder angles, walkline going, stringer lengths and comfort check, with 3D model and DXF drawings.","Double Winder Staircase Calculator",{"slug":85,"title":86,"description":87,"h1":88},"concrete-stair-calculator","Concrete Stair Calculator: Volume, Rebar & Landing","Concrete stair calculator with landing: steps, waist slab, concrete volume and rebar weight, plus a 3D model and DXF drawings. Free.","Concrete Stair Calculator with Landing",{"type":90},{"intro":91,"choose":94,"how":97,"norm":101,"faq":103,"related":116},[92,93],"This U-shaped stair calculator with landing designs a half-turn stair, also called a switchback: two parallel wooden flights joined by a landing that spans the width of both. With the flights side by side and no gap between them, it is what UK builders call a dog-leg stair. It makes the most of a short opening and is the most searched-for of the stairs that turn.","From the total rise (Y), the length of the opening (X), the width of each flight (W) and the steps before (P) and after (Q) the landing, the calculator works out the steps, checks comfort and lists the parts: stringers, landing frame, posts, treads, risers and railing, with the stairwell footprint in the Summary panel.",[95,96],"The wooden U-shaped stair with a landing, a half turn with a half landing, is the home stair that fits best into a short opening: the two flights climb side by side and the double-width landing brings you out right above the start. Choose it when you are short of length but have twice the stair width available.","Compared with the 180° winder stair, the landing uses floor area but gives a comfortable turn, without narrow treads next to the newel. A frequent mistake is a landing that ends up too high or too low: with P = {P} and Q = {Q} steps you decide where it sits, and the calculator keeps the same riser on both flights.",[98,99,100],"The total rise Y = {Y} mm is shared between {risers} risers: the {P} steps of the first flight, the landing and the {Q} of the second. Each step rises {riser} mm. On the upper flight, X = {X} mm minus the landing depth leaves a run of {going} mm and a tread depth of {tread} mm.","Step formula: 2 × {riser} + {going} = {step} mm; pitch: {slope}°; verdict: “{grade}”. On a U-shaped stair the most direct way to bring a high riser down is to add steps to the flights; the Summary panel says how many and in which flight, and a lower riser also makes it easier to meet the 7¾ in (196 mm) IRC limit.","The landing is two stair widths wide (2 × W) and one stair width deep, with a frame of timber beams and two posts. With Reverse turn direction the stair climbs to the left or to the right.",[102],"At a half landing the stair may not get narrower: the IRC asks for a landing at least as wide as the flight, and Approved Document K for landings at least as wide and as long as the narrowest flight. Because the landing breaks the climb, each flight stays well below the IRC limit of 151 in (3835 mm) of rise per flight and the NCC limit of 18 risers. Check headroom where the upper flight passes under the floor above: 6 ft 8 in (2032 mm) in the US, 2.0 m in the UK and Australia.",[104,107,110,113],{"q":105,"a":106},"How do you calculate a U-shaped staircase with a landing?","Subtract the landing depth from the length of the opening, share what is left between the treads and divide the total rise by all the risers, including the one onto the landing. Then check 2R + G. The calculator does it all at once and lets you move steps between the flights.",{"q":108,"a":109},"What are the dimensions of a U-shaped staircase?","Two flights wide and one flight plus the landing long. For a floor-to-floor height of 2.6–3 m (8½–10 ft), a comfortable U-shaped stair usually fits in roughly 2 × 3 m of floor area, depending on the flight width; the Summary panel shows the exact footprint of yours.",{"q":111,"a":112},"Switchback, half-turn and dog-leg: are they the same?","They all turn 180°. Switchback and half-turn are general terms; dog-leg is the UK term for the version with the flights side by side and no well between them, which is how this calculator draws it.",{"q":114,"a":115},"U-shaped stairs with or without a landing?","Without a landing, the turn is made with winders and saves a little floor area: that is the U-shaped winder stair. With a landing it is more comfortable and safer, and you can stop halfway.",[117,118,119],"metal-u","wood-u-winder","wood-three",1791467610010]