[{"data":1,"prerenderedAt":117},["ShallowReactive",2],{"pages:en":3,"type:en:wood-u-winder":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":113},[92,93],"This U-shaped winder stair calculator designs a 180° half turn in wood with the treads of the turn fanned around a newel post instead of a landing. It takes up less floor area than a U-shaped stair with a landing and is common in houses where the stairwell is tight.","Enter the total rise (Y), the run of the upper flight (X), the width (W), the steps in each flight (P and Q) and the winders in the turn (K). The calculator divides the 180° between the winders and outputs each one as a separate part, with its shape and its mark. Not to be confused with a double winder stair, which turns twice by 90° with a straight middle flight in between: that one has its own calculator.",[95,96],"Choose the 180° winder stair when the stair has to make a half turn in the least possible space: the {K} winders turn around a newel post and replace the double-width landing. It is the compact stair of many houses and duplexes, and the wooden alternative to a spiral when you would rather have straight flights.","A winding half turn is the hardest on the going: next to the newel the treads almost disappear. That is why a wide stair (W = {W} mm or more) and a handrail on the outer side are advisable. If a landing fits, the U-shaped stair with a landing is more comfortable; if even less space is available, look at the spiral.",[98,99,100],"The total rise Y = {Y} mm is shared between {risers} risers ({P} below, {K} winders and {Q} above): {riser} mm per step. On the straight flights the run is {going} mm and the tread depth {tread} mm.","The {K} winders share the 180° turn around the central newel; each has a different shape, so they appear separately in the bill of materials and in the DXF. Step formula: {step} mm; pitch: {slope}°; verdict: “{grade}”.","If the pitch falls below 30°, the stair is shallow and makes the climb longer than necessary: shorten X or add steps, as the Summary panel suggests.",[102],"The winder rules are the same as on a quarter turn: at least 10 in (254 mm) of tread at the walkline and 6 in (152 mm) at any point under the IRC, and at least 50 mm at the narrow end under Approved Document K. On a 180° turn the treads next to the newel are the critical ones, so check them on the winder sheets of the drawings.",[104,107,110],{"q":105,"a":106},"What is a U-shaped winder stair?","A half-turn stair without a landing: the 180° turn is made with winder treads that share the angle around a newel post. It is also called a half-turn winder stair or a 180-degree winder stair.",{"q":108,"a":109},"How many winders in a 180° turn?","Usually between five and seven. With fewer, the treads are very narrow next to the newel; with more, the stair takes up more space. Change K and watch the tread depth and the verdict.",{"q":111,"a":112},"Are 180° winders comfortable?","They are if the going on the walkline is close to that of the straight flights and the riser height stays constant. The weak spot is the newel side, where the treads are narrow, so people tend to use the middle or the wide side.",[114,115,116],"wood-u","wood-l-winder","spiral",1791467610169]