[{"data":1,"prerenderedAt":119},["ShallowReactive",2],{"pages:en":3,"type:en:wood-l":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 L-shaped stair calculator with landing designs a quarter-turn stair: two wooden flights at 90° joined by a square landing (a quarter landing in UK terms). It is the way to gain height when there is not enough length for a straight flight, and the most common L-shaped staircase in houses.","Enter the total rise (Y), the run of the upper flight including the landing (X), the width (W) and how many steps go before (P) and after (Q) the turn. The calculator places the landing, checks comfort and produces the stringers, landing frame, newel post and railing with their sizes, plus a 3D model and DXF drawings. The step figures are the same for an L-shaped stair in steel or concrete, so it also works as a general stair calculator with landing.",[95,96],"The wooden L-shaped stair with a landing is the most comfortable and safest turning stair for a home: the landing splits the climb in two and there are no narrow treads at the turn. Choose it when the opening has two free sides and room for a {W} × {W} mm landing.","Compared with the 90° winder stair, the landing takes more floor area, but every tread keeps the same going from side to side and the landing is a good place to pause or turn a piece of furniture. With P = {P} and Q = {Q}, moving steps between the flights changes the landing height and the going of the upper flight, not the riser.",[98,99,100],"The total rise Y = {Y} mm is shared between {risers} risers ({P} steps below, the landing and {Q} above), so each step rises {riser} mm. On the upper flight, X = {X} mm minus the landing width ({W} mm) leaves a run of {going} mm per step and a tread depth of {tread} mm with the nosing.","With the default values the step formula gives {step} mm and the pitch {slope}°: “{grade}”. A riser that is too high is fixed by adding steps to one of the flights; the Summary panel works out how many and applies them in one click. Watch the riser height in particular: for a US home it must not exceed 196 mm (7¾ in), and in England 220 mm.","To choose the split between P and Q, look at the opening: the lower flight usually starts against a wall and the upper flight arrives at the floor above. With Top tread one riser down, the last tread sits one riser below the upper floor and the floor itself becomes the final step.",[102],"The landing must keep the full width of the stair. The IRC asks for a landing at least as wide as the flight it serves and limits a flight to 151 in (3835 mm) of rise between landings. Approved Document K asks for landings at least as wide and as long as the narrowest flight width. In Australia, the NCC allows 2 to 18 risers per flight. Headroom over the whole stair, including the landing, is 6 ft 8 in (2032 mm) under the IRC and 2.0 m in the UK and Australia.",[104,107,110,113],{"q":105,"a":106},"How do you calculate L-shaped stairs with a landing?","Count the landing as one more step: divide the total rise by all the risers, including the one onto the landing, and share each flight's run between its treads. Then check that 2R + G stays between 600 and 660 mm. The calculator does it all at once and lets you move steps from one flight to the other.",{"q":108,"a":109},"What are the dimensions of an L-shaped staircase with a landing?","The landing is a square as wide as the stair ({W} mm with the default values). Each flight takes up its treads plus the landing, and the total footprint is shown in the Summary panel. If the opening is too small, the alternative is an L-shaped winder stair, which turns the corner with winder treads instead of a landing.",{"q":111,"a":112},"L-shaped stairs with a landing or with winders?","A landing is safer and more comfortable because the turn is made on the flat, and it gives you a place to rest and to turn furniture. Winders save space, but the treads in the turn are narrow on the inside.",{"q":114,"a":115},"Does it work for a steel or concrete L-shaped stair?","The step layout does: tread depth, riser height and the split between flights are the same. For a fabricated steel stair with brackets and a landing frame, use the L-shaped steel stair calculator.",[117,118],"metal-l","wood-l-winder",1791467609602]