[{"data":1,"prerenderedAt":118},["ShallowReactive",2],{"pages:en":3,"type:en:metal-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 steel stair calculator handles two flights of bracketed stringer meeting at a square landing, a quarter turn of 90°. It is the usual steel stair with a landing when the opening is too short for a straight flight: the first flight runs along a wall, the landing turns the corner and the second flight arrives at the upper floor.","You set 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, splits the rise and produces the stringers, landing frame, corner post and railing with their marks. If you are searching for a DWG of an L-shaped steel staircase, the DXF generated from your dimensions opens straight in AutoCAD, with the steel staircase design dimensions already on it.",[95,96],"The L-shaped steel stair with a landing is the answer when the opening is too short for a straight run but has two free sides: the first flight climbs along one wall and the second leaves the landing at 90°. The square landing, {W} × {W} mm with the default values, gives a place to stop halfway and makes it easier to carry furniture up.","Compared with a turn made of winders, the landing takes more floor area, but every tread keeps the same going across its width, which is the safest option. Compared with the sawtooth version, the stringers here are straight, with a bracket per tread. With P = {P} steps below and Q = {Q} above, moving a step from one flight to the other keeps the riser, changes the landing height and changes the going of the upper flight.",[98,99,100],"The total rise Y = {Y} mm is shared between {risers} risers, counting the step up onto the landing: {riser} mm each. On the upper flight, the length X = {X} mm minus the landing width leaves room for Q = {Q} steps, with a run of {going} mm and a tread depth of {tread} mm including nosing.","The step formula comes to 2 × {riser} + {going} = {step} mm and the pitch to {slope}°: “{grade}”. The most effective way to fine-tune comfort is usually to move steps between the two flights (P and Q) or add one; the Summary panel says how many and applies it.","The landing is a square with sides equal to the stair width W = {W} mm, built from a tube frame with a post at the free corner. The Reverse turn direction switch makes the stair left-hand or right-hand without changing any dimension.",[102],"In the US, the IRC requires a landing at least as wide as the stair it serves and limits a single flight to 151 in (3835 mm) of rise between landings. Approved Document K in England asks for landings at least as wide and as long as the narrowest flight width, clear of door swings. Australia's NCC allows 2 to 18 risers per flight. The strength of the stringers, landing frame and post is a matter for the structural design.",[104,107,110,113],{"q":105,"a":106},"How do you calculate steel stairs with a landing?","The landing counts as one more step: divide the total rise by all the risers, including the one up onto the landing, and divide each flight's run by its treads. Then check 2R + G. The calculator does both at once and lets you move steps from one flight to the other.",{"q":108,"a":109},"How big is the landing of an L-shaped stair?","Here it is a square as wide as the stair ({W} mm with the default values), which is the minimum that keeps the full width through the turn under the IRC and Approved Document K.",{"q":111,"a":112},"Can it have sawtooth stringers?","Yes: the L-shaped sawtooth steel stair calculator uses the same step layout with zig-zag stringers instead of brackets.",{"q":114,"a":115},"What about the same stair in wood?","The L-shaped stair calculator for wood uses board stringers and timber beams for the landing, with the same calculation rules.",[117],"wood-l",1791467607302]