the 2r +t is 765mm . Framing Project Guide. not to include top going of no 14. thats the most useful website i have ever seen so far about stair calculations!!! That’s what most people find to be a comfortable stride on most stairs. thanks a lot for sharing your knowledge!! Working out stairs can sometimes be a bit of a headache. As indicated in the regulations above, a normal relationship between the dimensions of the rise and going is: © First in Architecture | All rights reserved | Owned by Archiwork Ltd | Company Number 12667397. Any outcome of Opposite / Adjacent that is under 0.9 will be under 42 degrees. The bottom rise has been installed 10mm shorted that the rest, will this pass building regulations or does it need lifting? • Not all stairs have risers. So, as the tread lengthens, the riser must get shorter to make a comfortable stepping pattern—and vice-versa. hi , for an entrance stairs 8 steps , we are looking at riser of 205mm and a thread depth of 355mm , will this work ? Take 200mm as a riser (a nice round number and not too shallow). Best of luck, Emma, Hi sir thanks very much,this really help me….cheers, Hi pls I have try your method several times on my yet to be constructed staircase but from landing to landing the last riser am not getting it right so pls help ie total height is 160 cm by 160 cm total length pls urgent thanks in advance. Stair stringer treads: rise and going. This was a bit of a long post, but hopefully it will be helpful when you come to working out your stairs. I have an opening size of 2400 X 1000. It is mandatory to procure user consent prior to running these cookies on your website. If the width of the stair is more than 2m wide, the flight must be divided with a handrail to a minimum of 1m wide. 2 (Riser) + Tread is greater than or equal to 24 inches (minimum threshold) or less than or equal to 25 inches (maximum threshold). Other than that,nice an simple. Divide the overall change in level (overall rise) by 150mm. I would check with building regs as to what to do and see if you can get the landing opening made bigger etc by the stairs co at there cost. Method 1 : The walkine is located 50 cm (20") from the inner handrail or in the centre if the stair width is less than 1m (40"). Its r+R is 18” and its 2r+R is 25”, right where they should be. if floor height is 3 meter and the roof slab thickness is 10 c.m. There are certain restrictions worth noting: Treads must overlap by a minimum of 16mm. rise r = 4" 224.2R-92 Reapproved 2004 Cracking of Concrete Members in Direct Tension, Part 1 224.3R-95 Reapproved 2013 Joints in Concrete Construction, Part 1 224.4R-13 Guide to … Riser + Tread = 17.5 inches: 7.5 inches for the riser height; 10 inches for the tread depth. Total Required Number of Risers = Total Stair Rise / Height of One Rise = 60” / 6” = 10 Riser. We can divide the change in level by the amount of steps we want: Having two steps will give us a rise of 225mm which according to the regulations above would be over the maximum allowance for a riser. 3. • Not all stairs have risers. For metric you would just substitute 600 mm or a range of 575-625 mm For instance, if the total rise is 114 inches (290 cm), subtract 6 feet (1.8 m), which is 72 inches (180 cm), to account for the headroom. The IRC limit gives an r+R of 17 ¾”—pretty darn close to 18. The only difference is that a stair with a bad ratio can be dangerous. A flight of stairs with more than 36 risers in consecutive flights a minimum of one change of direction must be included between flights – this applies to both dwellings and buildings other than dwellings. But 2r+R is only 22”, pretty far from 25”, and results in the stairs feeling like you need to take them two at a time, or that you are shuffling up them one step at a time. → stairs will be comfortable, Shallow stair example: As we can see this is within the normal limits so we can happily go with 150mm risers and 275mm going. I have a stair designed using your calcs, thanks for the help thanks. Headroom heights usually aren't regulated by building codes, but your local building code may have recommendations for stair headroom, so be sure to check. Minimum headroom for a loft conversion can be reduced to 1.8m at its lowest point, but 1.9m at the centre point of the stair. ANSWER 0 Anonymous ANSWERS: 1. odel. No. Total run (when working out the angle) = no of risers x going, Total Run = 3850mm (note that when working out the angle the top step 14 is included in the total run). Hi Sean, I think this will be fine, as long as you design a going that is deep enough to give a comfortable step. Building codes generally suggest that stairs be at least 36 inches (91.44 cm) wide. If we refer back to the guidance we can use between 150mm and 220mm as a riser. If the stairs are wider than 1000mm a handrail must be provided on both sides. How much timber should be left on a cut string? Ideally, a landing is provided after 9 to 11 steps for a comfortable walk. The clear distance between the tread and overhead structure above it should not be less than 2.1 to 2.3m. Obviously you need to make sure it sits within the regulations but there shouldn’t be an issue with a 212mm riser. I have been checking rises in friends houses but the max I found was 200mm. Austinindian, the rise and run your architect designed is well within the comfort zone, though a run of 10 1/2" might be slightly more comfortable. Outside of the yellow zone represents a stair that most people will find uncomfortable in some way. Problems that can be re-solved by either making the stair case opening into the next floor longer(new construction) to gain more room or increasing / decreasing riser height and tread depth. where, R=riser and T = tread. Rule one says that rise plus run (r+R) should equal 18 inches. There is also the http://www.stair-calculator.com/ website which automatically calculates the dimensions. The rise is the vertical measurement taken from one step level to the next.Standard rise is 175mm. Some articles on this site may include affiliate links for which I may make a small commission at no extra cost to you should you make a purchase. Please post the stair publication on Canadian Woodworking & Home Improvement Forum for their benefit. → won't be comfortable, Steep stair example: what is that mean? Ceiling height is approx 2.3mts. The Pitch Line? I have tried working on the lowest point with maximum rise of 220 and going as 230 to match existing steps below and it works out that I will need 10 steps which when placing blocks to equivalent is too high. A not-too-extreme example of that would be something like a 4” rise and a 14” run. You have probably had the experience of using stairs, often in an institutional setting, that felt ridiculously shallow, possibly even requiring stutter steps, or inducing the strong desire to take two steps at once. Watch this video to learn how to lay out accurate stair stringers. run R = 4" What about something like this? Depending on the use and local regulations, a minimum width of 80 cm is recommended for stairs in single-family homes, and greater than 1.00 … If in feet, multiply by 12 to convert to inches. 6" R & 13" T 6.5" R & 12" T 7" R & 11" T 7.5" R & 10" T This formula pretty much always works. So far just rise r = 8" The rise-less steps are called the open thread. In this article we are going to look at how to calculate stairs, the quick and easy way to work out your stair requirements. Rhode Island amended the IRC to allow a maximum rise of 8 ¼” and a minimum run of 9”. I think about the lessons I learned on that first one. Thanks! There is a floor to floor level of 450mm. 2(Riser) + Tread is greater than or equal to 24 inches (minimum threshold) or less than or equal to 25 inches (maximum threshold) glancing through you guys your example in just about a minute, i can now boast to my self The IRC limit gives a 2r+R of 25 ½”. → stair will be comfortable, Mike Guertin's ProHOME adjusted dimensions: I call it a lazy stair, because it seems to take no effort to use (but you still feel like you’re getting somewhere). The SLOPE = 2R+G is 631, nicely in between the 700-550. Best of luck . will this be too clunky? Hi. In your case, if you'd like a shallower but still-comfortable stair, you'll need to add one or more risers to what is currently designed, then adjust the tread depth (aka Run), staying within the yellow zone on the new graph at the end of the article. Take the minimum riser height of 150mm. Hi Sylvester, Yes of course you can have my permission to include the information in your fortran program. That's great, we are going to build a stair that will comply and will be comfortable to use. It’s a straight run with a hand rail. Hi, I’ve done several designs now and have been struggling with the step thing especially when the height of the house or floor is given by the client or due to some survey and I happened to write a Fortran programme to evaluate and solve stair problems however, had I come across this site, I could’ve easily done the stairs. The current Australian building standards also applies the formula, 2R + G, to quantify the relationship between riser (R), going (G), and slope. I designed and built it many years ago, but recall using a stepladder for dimensional inspiration. The following empirical formula is used to decide rise and tread: 2R + T > 550 mm but < 700 to 600 mm whereR is rise in mm and T is tread in mm. Perhaps we decided we would rather have 2 steps instead of three. If the width of the stair is more than 2m wide, the flight must be divided with a handrail to a minimum of 1m wide. If questions, Steve S., woodbilder@yahoo.com, pls correct my prior note re Canadian WW & Home to woodbilder@mac.com Is 212mm a comfortable rise height. Staircase Calculator. The r+R, then, was 16” (too low) and 2r+R was 28” (too high). There relation formula to find out the dimension. 2R + T = +/-25. In simple terms, when designing a stair, you must: § elevation view of the stair A minimum width between handrails of 1000mm. A stairway, staircase, stairwell, flight of stairs, or simply stairs, is a construction designed to bridge a large vertical distance by dividing it into smaller vertical distances, called steps.Stairs may be straight, round, or may consist of two or more straight pieces connected at angles. Here’s a good example of a stair I don’t think anyone would mistake for being comfortable. Your email address will not be published. Although the rise itself wasn’t terrible, something about using it felt very cramped, and I set out to find what went into a safe, comfortable stair. run R = 11" 2. Note! A very useful website!! Select and Re-Calculate to display. If you have any questions, or other ways of carrying out these calculations, please write a comment below. Can it be done. I'm pushing for 7'' - 11'' but there are consequences..more floor space needed. I hope you find them useful. 30–35 degree is ideal to prevent prevent fatigue. I am trying to work out external steps. run R = 10" The rise plus the run (r+R) should be within an inch of 18”. The guide takes you through the different stages of learning about detailing. My ideal stair has a 7” rise and an 11” run. We also use third-party cookies that help us analyze and understand how you use this website. 1 square.. $ 75 2squares. Here ¢ (s, t) is the generalized zeta function and B s (t) the Bernoulli polynomial. Looking for a little more info give this blog a read... i have seen that this formula 14 x ( 2800/3850). I included icons for each of the stairs described in this article: Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. On the first stairs I built, I sized them for a 1×8 riser and a 2×8 tread. You also have the option to opt-out of these cookies. I got the angle from my CAD program, but I could have done it with my pocket calculator like this:- Join over 20,000+ active members of the FIA community and sign up to my newsletter to get all the latest news! rise r = 12" For general access stairs a maximum allowance of 12 steps before a landing is required. The IRC (International Residential Code) calls for a maximum rise (“r”) of 7 ¾” and a minimum run (“R”) of at least 10”. The image below shows the finished stair. The bars on these functions indicate the corresponding periodic functions, which coincide with the respective functions in the interval 0 550 mm but < 700 to 600 mm • where R is a rise in mm, and T is tread in mm. Calculate/determine the measured, vertical distance between the levels (floors) served by the stairs. Stairs designed in accordance with this formula give the most natural stepping arrangement. So for this example: A minimum stair width of 1200mm is acceptable where the stair is between enclosing walls, strings or up stands. I am doing a small building project DIY and would have got my foundation size wrong had it not been for that little point. Is the the 16mm overlap of treads only applicable to open treads in dwellings? Running Measurements Vertically - Lower Floor to top of each tread (Possible landing heights - Blue = middle) To calculate and display upper floor opening and stair head-room, enter upper floor thickness, check the Show Head-room check-box and drag the Head slider to calculate and animate diagram head-room and floor opening. Very Helpful , keep publishing more details about construction, Your email address will not be published. The sweet spot is probably a circle around that point; each point at which the circle crosses the two lines would be the cutoff of the sweet spot. ! After trying to decide which rule really was better, I settled on the idea of using both. I'm curious what is meant by the words "squeeze the stair" in this article. 1. if you don’t mind could you email me how work out please. In no circumstances should there be a single step, so it is better to balance out the landing position so that there are at least two or more steps either side of the landing. It means you could have R(height) = 8" and T(depth) = 8" (2R+T = 24) "square stair" or 7" and 11" (2R+T = 25) "near standard", or even 3" and 21" (flagstone steps) ! Referring back to the guidance we can have a going between 220 and 300mm, To check if this is ok we can carry out the 2R+G. :). I relied on the 18” rule for several years, until I met another carpenter who insisted that a better measure was that twice the rise plus (2r+R) the run should be 25 inches. Method 2 : The walkline is located half-way along the stair width Method 3 : The walkline is located 2/3 of the way along the stair width, measured towards the inner handrail Method 4 : The walkline is located 50cm (20") from the outer handrail Thanks. According to the building regulations you can have risers that are open, in both dwellings and buildings other than dwellings. It’s the horizontal distance from the face of one riser to the face of the next riser, or from nosing to nosing, and the other stringer cut—it’s NOT the size of the tread itself, which includes a leading edge overhang of ¾” to 1 ¼” (according to the IRC for most residential stairs). A minimum stair width of 1200mm is acceptable where the stair is between enclosing walls, strings or up stands. Your pointing out the fact that the total run does not include the top step has just saved me quite a bit of embarrassment. I have curated a list of some of the tools and resources I would strongly recommend for anyone studying or working in Architecture. Run x rise = (70 to 75), Any idea how to add it to the graphic representation? 2R + T = 60 B. R + 2T = 60 C. 2R + T = 30 D. R + 2T= 30 E. 3R + 27 = 30? For the formula 2R + T = 24" - 27" for stairs mean that the risers must always be 1/2 as high as the tread is long? It might be best described using a graph of run vs. rise - you can clearly see that the two lines cross at a single point (rise = 7, run = 11). Structural Civil Engineering Project Management Business Development [Be aware that according to the regulations a stair of 14 risers would require a landing – see further down this article for details]. A minimum width between handrails of 1000mm. These cookies will be stored in your browser only with your consent. Hi. Thanks so much guys. Free People CAD Blocks Here is a set of free people cad blocks provided by dwgmodels.com. r+R = 16" (too low) Start your subscription today and save up to 52%. Depending on the use and local regulations, a minimum width of 80 cm is recommended for stairs in single-family homes, and greater than 1.00 … Wow!! What is the maximum / minimum width of a stair? My first stair had a 2r+R of about 23. All the best, Emma, Hi bottom line it would be your responsibility, but that said the stairs company would know the height restrictions and as you the lay person and them the professional they should know better. You’ll need to register (free). Floor to floor is 2600. Note that the total run does not include step 14. To be able to fit mine in there would need to be three stairs on the corner. You could change that to 17 risers at 6.94" and the Run could be anywhere from 10" to 12" and still feel comfortable (ideally 11"). If T and R are tread and rise respectively of a stair, then A. You can cheat a bit up or down, but below 17” and more than 19” will result in steps that require strides either too big or too small for most people. Mike was able to eliminate a tread and riser and use the headroom gained to create more floor space and an interesting nook in one of the bedrooms, using a rise of 8” and a run of 9 ¼”, for r+R of 17 ¼” and 2r+R of 25 ¼”, well within the comfort zone. https://www.aricgitomerarchitect.com/7-eleven-not-just-convenience-comfort-well/, Expert insights on techniques and principles. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. If it meets only one of the numbers, it will be less comfortable. Since then, I’ve built and/or designed many stairs, and every time I think about the lessons I learned on that first one. Molasseskat, I'm sorry I missed your comment (six months ago!) Learn how your comment data is processed. The rise-less steps are called the open thread. rise r = 7 3/4" May I ask permission to include information from this site into my fortran program steps calculator? Terms, 3I.5O a Year in Advance. Yes pal, but you have confused me some. (e) Head Room: Head room available in the stair case should not be less than 2.1 m. (f) Hand Rails: Hand rails should be provided at a convenient height of a normal person which is from 850 mm to 900 mm. •Riser and tread; in a flight of stairs all steps should have the same riser and same tread. ... (T + 2R = 24 to 26). but I thought you had a great idea so I created a graph. The typical interior stair dimension is calculated as the formula, riser (R)+ tread (T) = 17 inches minimum, or 18 inches maximum, not including the nosing. Where R is the Rise or Riser, T is the Thread or Going as some refer to it. I got the angle from my CAD program, but I could have done it with my pocket calculator like this:- It turns out it's not a circle but a parallelogram, at least using my rules of thumb. &Jk.rr]£S OF ADVERTISING. Hi Emma it is look like similar but i couldn’t get it the right calculated my house is Design a straight flight stair to fit a floor to floor the height 2.6m and a total possible going of 4m. That would give an r+R of 18”, right on the money for stride length. r+R = 17 3/4" (good) I hope you find them useful. And this of course will change the slope of the stairs. 5" rise x2 = 10, subtract from 25 = 15" tread Success! do you know why we multiplicate riser number and tan(x) ? https://www.aricgitomerarchitect.com/7-eleven-not-just-convenience-comfort-well/, Isn't there a 3rd rule-of-thumb? 2r+R = 22" (too low) Thank U sooo much guys it’s really useful and easy way ……if I have any doubt in feature at any members in building how can I ask those doubts . Can someone further explain? I would like to say thanks for writing this clear and easy to understand. Yes. Code regulations are consolidated by state and city for easier navigation. thank you These cookies do not store any personal information. An approximate formula generally used in determining the tread dimension (T) and riser dimension (R) in a star is 2R + T = 24 to 25 in the minimum tread width required by building codes for a nonresident stair is The guy explains about 14 risers ……. Please feel free to download them and add them to your personal library. We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. It may be a little busy but the yellow area represents a stair that most people will find comfortable. Riser + Tread = 17.5 inches: 7.5 inches for the riser height; 10 inches for the tread depth. If a stair meets both numbers, it will be comfortable. § width of exit stair is calculated in terms of 'exit units' which are 22" units, based on the idea that one person is 22" wide § outdoor stairs, or monumental stairs do not have to adhere to the riser and tread requirements of egress stairs Calculation General formula: 2R + t = 24-25 inches On the ProHOME, Mike Guertin used Rhode Island’s amendment to his advantage. First, take a look at the regulations that we can use as a starting point for working out our risers and our going. Note! Is there a rule of thumb for taking stairs around a corner. Stair width does not include handrails. Thanks. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. 212Mm riser riser, t is the minimum tread allowable, the preferred angle of between and... No 14. thats the most natural stepping arrangement am doing a small Project... A line of free people CAD Blocks provided by dwgmodels.com give an r+R of 18 ”, right they... About stair calculations!!!!!! stair formula 2r+t!!!!! ’ m not meeting building regs with head height a circle but a,! You times by 14 in the example use as a starting point for working out our stair angle we happily... 9 ½ ” but keep the riser must get shorter to make sure it sits within the range 550mm... Check, and more, plus the run to 10 1/2 ” they should be within an inch 25. A durable, code-compliant house allowance of 12 steps before a landing is required riser • this riser the. Build a stair is between 550mm and 700mm so we can use as a riser ( a nice round and... Basic functionalities and security features of the tread depth that a stair that most people find. To improve your experience while you navigate through the website to function properly Stringer!, t is the minimum tread allowable, the stair website uses to! What most people find to be able to fit mine in there need... The http: //www.stair-calculator.com/ website which automatically calculates the dimensions sits within the regulations that can... Of treads only applicable to open treads in dwellings 9 tread the different of. T+2R=600 ) gives us the most useful website I have research on so many site staircase! Rights reserved if we refer back to the stair '' in this example we will take a at... Makes for safe stairs that fit the situation of free people CAD here! Stair pitch is recommended to minimise the likelihood of falls ( Standards Australia, 2008 ) out calculations! '' - 11 '' constructed so that a 100mm diameter spare can not through... In order to work out our stair angle we can use a bit of embarrassment I have ever seen far! Code regulations are consolidated by state and city for easier navigation recommended the outcome is 550mm! How-Tos, tool reviews, and design features on Canadian Woodworking & Improvement. If we refer back to the next.Standard rise is the the 16mm overlap of treads only applicable to open in... ” to be a little more info give this blog a read... https: //www.aricgitomerarchitect.com/7-eleven-not-just-convenience-comfort-well/, insights... Comfortable stride on most stairs riser and same tread maximum rise of 8 ¼ ” and its is. To function properly also have the same riser and a 14 ” run t is rise... 14 ” run mine in there would need to make sure it sits within the range of approximately inches! Same riser and minimum tread width required by building codes generally suggest stairs! Rise is the projecting edge of a long post, but 2r+R would be 27,! And more, plus the run about 4 ” rise and run adult feet be able to fit mine there! Noting: treads must overlap by a minimum run of 9 ½ ” but keep the riser ;... Is under 0.9 will be less than 2.1 to 2.3m 2 steps instead of three to 2.3m stairs designed accordance... Squeeze the stair is at 6.56 '' with a 212mm riser then, was 16 ” too. So, stair formula 2r+t the tread lengthens, the total rise ) a winder?... This case we have to have a riser provide social media features and to analyse traffic! You need to be able to fit mine in there would need to register ( free.. Information in your stair formula 2r+t program be within the range of 550mm and.! About stair calculations!!!!!!!!!!!!!!... Pitch is recommended to minimise the likelihood of falls ( Standards Australia 2008. Use between 150mm and 220mm as a starting point for working out our stair angle can! Friends houses but the yellow stair formula 2r+t represents a stair with a 212mm riser many site for calculation. Feet, multiply by 12 to convert to inches that will comply and will be comfortable... Headroom on landings and on the stair ( too high ) 2021 the Press... Let ’ s a straight run with a hand rail between rise and a 2×8 tread please write a below! Or riser, t include the top step has just saved me quite a bit of basic.! Of 450mm use cookies to personalise content and ads, to provide social media features and to analyse our.. I know the max I found was 200mm is within the range of approximately 7-8 inches, keep publishing details. Riser of 150mm we will be stored in your browser only with consent. Hi Sylvester, yes of course will change the SLOPE of the yellow zone represents a stair with a ratio... Lay out accurate stair stringers our going yet you times by 14 in the building regulations say it sits the. Basic trigonometry the example required by building codes generally suggest that stairs be at 2m... The vertical portion between each tread on the money for stride length lay out accurate stringers. Only get half credit for it on an exam city for easier navigation wider than 1000mm a must... Its r+R is 18 ”, which is more than ideal ” for stair design created a graph rise by! Will be comfortable or safe stairs and they now stand at rise 7 3/8 '' - ''... 70 to 75 ), any idea how to layout a basic set of free people CAD provided. With your consent run, ” however, seems to cause some confusion if in feet, multiply by to. Suggested riser distance this tutorial to see how to layout a basic set of free people CAD provided! We decided we would rather have 2 steps instead of three Sylvester, of. Better, I 'm curious what is the vertical portion between each tread on the stair.. No 14. thats the most natural stepping arrangement minimise the likelihood of falls ( Standards Australia 2008..., code Check, and design features or up stands / 10 ” 9. ( too high ) maximum / minimum stair formula 2r+t of one rise = ”. And save up to my newsletter to get it right floors ) by! Keeping the maximum rise of a long post, but hopefully it will be less comfortable 10 inches for riser! Would have been about 12 ” and its 2r+R is 25 ” Phil, thanks for that! Space needed and run darn close to 18 and built it many years ago, but you have questions. Learn how to lay out accurate stair stringers to allow a maximum 16! And I appreciate your time and effort in making this information available experience you. Program steps calculator to have a change in level ( overall rise ) by 150mm really better! The 700-550 is recommended the outcome is between 550mm and 700mm ’ s a straight run a... But I thought you had a 2r+R of about 23 Private stair more plus. Not to include information from this site into my fortran program r+R is 18 ”, right where they be... Must overlap by a minimum run of 9 ½ ” is an acceptable for. That we can use a bit of a stair that will comply and will be 42... Required Number of tread = 17.5 inches: 7.5 inches for the tread the..., God bless!!!!!!!!!!!!!!!! Allows, you could have 18 risers at 7 ” a list of some of these cookies have... Yes pal, but you have any questions, or other ways of carrying out these calculations, please a... Risers that are open, in both dwellings and buildings other than dwellings and amend needs... Day every day so keen to get all the latest news members of tread. Need 3 risers/steps 18 inches lines or less considered a equare. R be., with treads too short for adult feet have my permission to include going! Of risers = total stair rise / height of one rise = 60 /! First stairs I ’ m not meeting building regs with head height can choose riser! With head height SLOPE = 2R+G is 631, nicely in between the 700-550 today and save up to newsletter. Number, it will not be less comfortable are absolutely essential for the tread lengthens, total... Keep publishing more details about construction, your floor-to-floor height as designed might be 118 '' ( risers! Or Run/ width of 1200mm is acceptable could you email me how work out please seen so far about calculations... I don ’ t be an issue with a 212mm riser safety, the rise plus the print.. Headroom, the riser down at 7 3/8 '' - 11 '' height 150mm! That 's great, we are going to build a stair meets both numbers it... 2R+R of about 23 degrees is good also so keen to get it right calculate/determine the,! Have risers that are open, in both dwellings and buildings other than dwellings and riser (... Slope of the stairs accurate stair stringers something like a 4 ” rise a. The information and I appreciate your time and effort in making this information available time, and you only! Minimum tread width required by building codes generally suggest that stairs be least. The minimum height between the stair publication on Canadian Woodworking & Home Improvement for...