so Divide by 3: 17/3 = 5.6" - that's the rise you need to build, using 3 steps. [copy on file as http://www.stairways.org/pdf/2006%20Stair%20IRC%20SCREEN.pdf ] -, [19] Common Sense Stairbuilding and Handrailing, Fred T. Hodgson, [21] Building Stairs, by pros for pro, Andy Engel, [22] A Simplified Guide to Custom Stairbuilding, George R. Christina, [23] Basic Stairbuilding, Scott Schuttner, [24] The Staircase (two volumes), John Templar, Cambridge: the MIT Press, 1992, [25] The Staircase: History and Theories, John Templar, MIT Press 1995. He asked me if this was ok. There is no variances allowed for open risers. b) 10 mm between the deepest and shallowest treads in a flight. These data demonstrate that work on and around ladders and stairways is hazardous. Risers must have a maximum height of seven inches and a minimum height … Its length is measured … The riser height shall be measured vertically between … So your choices are 3 steps 5.8" high (those will want a deeper tread, say 13-14") or 2 steps that are a bit tall at 8.5" = subject to building department approval. It's more than an issue of Code Compliance and passing a final inspection that's also an issue of people falling and being injured. Every riser height must be the same within one stair. Just verifying. So it would be possible, for example, to have a dog-leg stairway that has 7" risers in the first section, and 7 1/2" risers in the second section. Think about going DOWN the steps and where your toes are now. That first riser height looks more like 8.5 inches to me, which is too high anyway. In Canada the rise can not be more than 5mm different from tread to tread. To correct a riser height issue - say the first step is 1" higher, then typically you would be cutting 1" off the first rough stringer rise dimension, then probably 7/8" off the next and so on over several to taper the correction and stay within the 3/8" allowance. The carpet used for the steps is the same carpet used for the floor which indicates that in all likely hood carpet made specifically for steps has not been installed. I agree that muscle memory is going to win out unless the landing is quite long – more than 4 or 5 feet. Stair tread depths shall be 11 inches (279 mm) minimum. Here's an example code citation for stair step height or rise: 2008 NYS Stair Code: R311.5.3.1 - Stair Riser height Requirements. Tom, I think a sketch of what you're up to would be helpful - if you want to send one use the CONTACT US link at page top/bottom. Some codes specify slightly taller stair risers, from 8" to 8 1/4" (Canada, for example). This contractor built this staircase from scratch, so it seems to me that had he done his calculations correctly, and been paying attention, he could have avoided this problem. John Wiley & Sons, 2006. In NY state what is the concrete riser height code when building new concrete walkways. Riser heights. Then since the landing counts as one of the treads; I divided the rise by 14 which give me a riser height of 5.57”. Dan. Apologies for the delay. Generally when we shorten the rise height below about 6" we need to make the tread depth greater to avoid a trip hazard. At the bottom of this staircase is the sidewalk, and at the top, is the porch that leads directly to my front door. The rises should not vary in height by more than 3/8" total, if I recall correctly…. GrantI can't make a reliable prescription for a site I know nothing about. The current step is 7 inches in height, which leaves 10 inches to span to the kitchen. - fall at 3-step sstair in library. Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia. Step riser specifications riser height (<= 7.75" or in some codes <= 7.0" or in Canada <=8.25") maximum and 4 inches (102 mm) minimum. I hired a contractor, who has demolished everything and is currently in the process of building it back. 94" total rise / 14 risers = 6.71" individual riser height for each of 14 risers or steps "up". Except mention it to your client. No taller. how many stairs do i need in 94" high finish floor? STAIR WIDTH. Watch out: be sure to measure the height difference (deck surface to ground surface) at a projected point along a horizontal line from the edge of the deck out to the location, in horizontal distance, of the front edge of the nose of the very first or lowest step of the stairway. Jane: What would be upside down? On 2017-04-18 S. Hyde, Jon R. Abele, ISBN-13: 978-1-933264-01-1 or The pre-made staircase risers we sell can be cut to size during installation. Difference between tallest and shortest riser cannot exceed 3/8". Stair riser heights shall be 7 inches (178 mm) maximum and 4 inches (102 mm) minimum. In this case they are existing stairs and we can mandate the height required (unless of course the existing drawings were not calculated correctly). OR if your local codes prohibit step rises over 7" then go with 14 risers instead of 13. Differing riser heights are a common cause of falls. The concept is that a low rise stair usually has, just as you suggest, a tread that provides a "longer" walking surface. 1.2. More importantly, they show that compliance with OSHA's requirements for the safe use of ladders and stairways could have prevented many of these injuries. by (mod) - Stair riser heights shall be 7 inches (178 mm) maximum and 4 inches (102 mm) minimum. 64-65. What are the rules for a low angle staircase? The entrance to my kitchen is 17 inches above my garage floor. Grossman, Samantha, "WATCH: Everybody Trips on This One Subway Stair", [Video], Time Magazine, (29 June 2012), [After this video of a problematic Brooklyn subway staircase went viral, the MTA stepped in to fix the problem. Up to a point. Is there any other way of correcting it? section 18.4 If you need a greater adjustment in the stair height between the ground surface and the deck surface in order to avoid having to re-cut a whole new pair of stair stringers, sometimes that can be accommodated by changing the height of the surface of the concrete or other masonry platform that many building departments and local codes require be placed as a landing at the bottom of the stairs. Yes20" as a single step up is too-high a rise and would be a trip hazard. Typical codes allow up to 3/8" rise variation among steps. Let me attempt to clarify the question. At https://inspectapedia.com/Stairs/Stair_Calculations.php you will find this subtopic CALCULATE STEP TREAD DEPTH https://inspectapedia.com/Stairs/Stair_Calculations.php#CalcTreads that talks about that dimension. The sum of two risers and one tread should [27] "The Dimensions of Stairs", J. M. Fitch et al., [28] Stair & Walkway Standards for Slipperiness or Coefficient of Friction (COF) or Static Coefficient of Friction (SCOF), NSFI 101-B  (National Floor Safety Institute), NSFI Walkway Auditing Guideline (WAG) Ref. The codes may allow such, but the people living in … Anita I agree that uneven steps are a trip hazard; The best solution builds steps that are not too tall (10" is too tall) but the problem we're going to encounter - maybe - is how much horizontal space you have in the direction of travel. Even if you become used to the stairs, other people are very likely to trip and fall. sidewalks, are not stairs. Good point. Let's design a stair for the total rise you cite: Divide the total rise by 2 and your steps are over 8" and too tall. If you can split the adjustment between the top and bottom stair risers by trimming the stringer top and bottom, you'll have just 1/4" or 0.25" of riser height variation (one at stair top and one at stair bottom) - thus minimizing the trip hazard risk of the uneven risers and the variation will be within standards. On 2015-11-19 The claims examiner as an employee of Carl Warren & Co. which handles claims for the city insists that the steps are safe as well as the city administrator although they haven't to date agreed to discuss with me what makes the steps unsafe other than to say that nobody has filed a claim because of a fall from the steps. The sum of two risers and one tread should I don't think we'll find an explicit prohibition in the stair codes, since the code writers can't and don't try to anticipate every possible variation on what people may invent. Wouldn't it be better to have an 8 inch step, or even 8.5, in order to make them even? it's 1/2 inch shorter than the rest of the stairs -, I actually need to remove a half inch from the bottom most stair of the stringer to fit). The IRC does not specify a minimum riser height. On 2017-10-10 I've seen several rules such as the sum of one tread and one riser should always be equal or greater than 17; I think we need to dig out some texts on stair design such as those in the references. ), [39] "How Slippery Is It", retrieved 8/29/12, original source http://www.icebike.org/Articles/howslippery.htm, [41] Frictional Coefficients of some Common Materials and Materials Combinations, The Engineering Toolbox, retrieved 8/29/2012, original source: http://www.engineeringtoolbox.com/friction-coefficients-d_778.html [copy on file as Friction and Coefficients of Friction.pdf ], [43] International Building Code, Stairway Provisions, Section 1009: Stairways and Handrails, retrieved 8/29/12, original source: http://www.amezz.com/ibc-stairs-code.htm [copy on file as IBC Stairs Code.pdf], [44] Model Building Code, Chapter 10, Means of Egress, retrieved 8/29/12, original source: http://www2.iccsafe.org/states/newjersey/NJ_Building/PDFs/NJ_Bldg_Chapter10.pdf, [copy on file as NJ_Bldg_Chapter10.pdf] adopted, for example by New Jersey. by (mod) - If you set the stair height, tread and riser parameters properly, you shouldn't have to mess with desired number of risers. 94/7 = 13.4 risers but since we can't have a fraction of a step, we either increase to 14 risers (giving a step height under 7") or 13 risers (giving a step height just over 7". Put another way, suppose you had to build a "stair" up from grade into your building entry and the total rise were 11" - you would not get away with a single 11" "step" now would you. I think the book said min. If you can fit that you're in good shape. What's the total adjustment in a 15 step stairway if the total rise really is 104.75" and instead of building steps that each rises 6.98" we instead make each rise 7" and how do we make that adjustment in individual stair riser heights?The total error when we get to the top step is 15 steps x (7" - 6.98") or 15 x 0.02 = 0.3" or 3 / 10 of an inch. Here's a quiz question / conundrum There's a typical exterior run of stairs in a house built in 2009. Stair riser height & construction questions & answers: Frequently-asked questions about proper height for stair risers or step heights when building or repairing stairs. In this case I took 14 steps to travel the slope which equates to 14 treads - 24” long. Should the risers be the same height ? Vol. As a homeowner, you should be aware of certain things to ensure that the stairs in your home are safe for you and your family. STAIR RISER HEIGHT FAQs at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. The stair stringers in the photo are were installed upside down and the notches are cut at an acceptable depth. Does he have to demolish the staircase and do it again? [33] Coefficient of friction of algae on surfaces [like stair treads]: Delphine Gourdon, Qi Lin, Emin Oroudjev, Helen Hansma, Yuval Golan, Shoshana Arad, and Jacob Israelachvili, "Adhesion and Stable Low Friction Provided by a Subnanometer-Thick Monolayer of a Natural Polysaccharide", Langmuir, 2008 pp 1534-1540, American Chemical Society, I full understand Bradley. A landing should be introduced every 16 steps in a flight of stairs. I think the book said min. Riser height and tread depth shall be uniform within each flight of stairs, including any foundation structure used as one or more treads of the stairs. The exact step rise would be 6.98" - so the builder can certainly make that 7" with almost zero adjustment to the individual tread rises and he can certainly keep the step rise uniformity well within spec.Now if we have 15 steps with treads that are 10" deep then our new stair run (horizontal distance) is 15 x 10 = 150" or 12 1/2 feet.If you have room to extend the stair run to 12 1/2 feet you're in good shape. The carpet for the steps and floor have a light blue pattern which gives the effect of the floor and steps as one. There is no exception for individual stair steps, first, bottom, top, or other. Meanwhile I'll provide two of my own: a "theoretical stairway" and then the "actual calculated stairway" at the end of these notes, based on the figures you provided. Now when … I am concerned that this will be a trip hazard. It is not just about the angle of the staircase or its rise, but these seemingly small details as well, details that will ultimately determine if you end up with regulation stairs or not. variances allowed for open risers. The maximum riser height shall be 73/4 inches (196 mm). I am legally disabled. If the are connected in any way (landing) they must be the same. Since your step at that point has a 10-inch rise it's too tall. Then select the concrete stairs, go to Properties Palette, … Riser height is measured from top of tread to top of tread of the next step. To put a long story short this job is being done half in revit and half in cad. Perhaps one of the experts here could give advise on this. The size of stair risers can vary depending on the total amount of space available, design aesthetic, or personal preference. There is just a little bit more to that rule. - But then also I think 3/8 is too much difference from stair to stair. The insulated floor raised the floor level and made the bottom step of my stairs short – a violation of the code. I'd want my steps to be at lesat 12" deep - so we need 36" or more in the direction of travel. by (mod) - how many stairs do i need in 94" high finish floor? These questions & answers about stair riser heights and stair design were posted originally at STAIR RISER SPECIFICATIONS - be sure to read the stair design details given there. Maximum 7 inch stair riser height and minimum 4 inch stair riser height. Is there an exception to the riser height variation for the very first step of the staircase? ‍ ‍ Riser and tread dimensions should be continuously uniform for safety; building codes limit variation to 3/8" | 10 mm. Rough carpentry, wall board and tap. over 28 ft. and there is additional room for a landing at top and bottom. Not only are your risers a bit high but you would have too much variation of the last step. This is a single-family house in NYC. a) 5 mm between adjacent treads, and You're welcome to use the page top or bottom CONTACT link to send us photos for comment. If these are in the same staircase, then they can only vary 3/8" between the shortest riser and the tallest riser. Or a combination where the first riser is higher than the second riser? It sounds like you have Two Separate sets of stairs. http://www.g-w.com/pdf/sampchap/9781590706480_ch18.pdf I also counted steps made on level ground over the same distance as the length of the stair and came up with 12 so I think 14 is conservative considering the slope but about right for my needs. 7/26/90 is very often cited by other sources for good design of stairs and ramps etc. uneven steps are a trip hazard. How high should the last step be to the bootem floor? I even roughed in the copper plumbing to his OK. Since I had carpet installers coming in the next day and it was late at night, I decided to shim the stairs to make all the risers equal height (see Figu… Stair tread depths shall be 11 inches (279 mm) minimum. If these are in the same staircase, then they can only vary 3/8" between the shortest riser and the tallest riser. The electrical had to installed by a master electrician. Let's use 13. All Oked. The strips along the edge of the treads are worn due to heavy traffic and one strip is missing. It also makes the math easy for your builder. What can I do, On 2017-01-11 Demolishing it all and beginning again would be a big job, but I will instruct him to do it if necessary. I do not want to feel like I am taking “baby steps” or alternately taking a “step-and-a-half” all the way up and down. available from the publisher, Lawyers ^ Judges Publishing Company,Inc., www.lawyersandjudges.com [email protected], [13] Slips, Trips, Missteps and Their Consequences, Gary M. Bakken, H. Harvey Cohen, Jon R. Abele, Alvin S. Hyde, Cindy A. LaRue, Lawyers and Judges Publishing; ISBN-10: 1933264012 ISBN-13: 978-1933264011, [14] The Stairway Manufacturers' Association, (877) 500-5759, provides a pictorial guide to the stair and railing portion of the International Residential Code. Let's use 13.94" total rise / 13 risers = 7.23" individual riser height. Risers must have a maximum variance of 0.375 inches between the highest and lowest risers on the staircase. [/size][/FONT], Powered by Discourse, best viewed with JavaScript enabled, http://www.g-w.com/pdf/sampchap/9781590706480_ch18.pdf. On 2015-11-12 On 2018-08-01 by (mod) - Can the top tread of a stair stringer be the same elevation as the finish floor ? Walkways, i.e. The risers are the vertical portion of your stairs, while the treads are the horizontal pieces you step on (see figure). He started from the ground up and made it all the way up to the last step (there were about 13 to begin with, including the porch/landing). Sounds like you'll have about a 2" discrepancy to deal with. 633.55 KB (Courtesy Arlene Puentes). Stair risers are used in staircases all over the world. Nearly half of these injuries are serious enough to require time off the job--11,570 lost workday injuries and 13,312 non-lost workday injuries occur annually due to falls from stairways and ladders used in construction. Nakajo, 3 Feb 2016. The tread surfaces? 94/7 = 13.4 risers but since we can't have a fraction of a step, we either increase to 14 risers (giving a step height under 7") or 13 risers (giving a step height just over 7". The going must be betwee… But, we can't set the run or landing to be at 28'-8". My rise is 78 in. Another possibility might include a landing midway up thus making all the treads shorter? Typically step rise should be around 7", I have two decks at different heights by 20 inches is a step required. I agree with CC, but 8.5 inches is high for steps. This article series provides building code specifications, sketches, photographs, and examples of the proper stair step height or stair riser dimensions and other stair riser requirements for indoor or outdoor stairways. On 2016-06-15 If I attach the pre-made stringer from the deck to the slab, ensuring that the top of the deck to the next stair down is the same height as the rest, then the riser height from the slab to the first stair is greater than a 3/8' variation from the rest of the riser heights by 1/8th of an inch (ie. The steps are poured concrete over a deck sheet, supported by 4 metal beams, supported by side walls. If you mean the photo of the tall rise steps to a deck with client showing the rise with a tape, "upside down" or not won't change the too-deep notch cuts that give almost no stringer strength - less than a 2x4 - nor the too-tall rise for this stair access from ground to deck. [26] >Steps and Stairways, Cleo Baldon & Ib Melchior, Rizzoli, 1989. Variations in riser height or tread depth shall not be over 1/4-inch (0.6 cm) in any stairway system. The IRC limit gives an r+R of 17 ¾”—pretty darn close to 18. But sometimes it's possible to correct an improperly built concrete stairway by increasing the length of the run and then pouring or building new stairs atop what was already there.If you had 13 risers (at 8") and if I GUESS that you had a stair tread depth of 10" and if the stair builder had any sense and made all the steps or treads the same dimensions, then your stair run would be 13 x 10 = 130" or 10.8 feet in the horizontal direction.The ACTUAL stairway, AS BUILT, had a total rise of 12 x 8" + 8.75" (for that "last step) or a total of 104.75" (or I might be missing something as I don't really know your site)Let's GUESS from the above that the total rise of the stairway was that amount: 104.75" over those thirteen unfortunate steps.If you drop the individual step rise to 7" 104.75 / 7 = 14.96 steps to climb that height 7 inches at a time (per step)So we can build a stair with 15 steps. More details about stair tread dimensions including a discussion of tread depth is at https://inspectapedia.com/Stairs/Stair_Tread_Dimensions.php - STAIR TREAD DIMENSIONS where we discuss the requirements for uniformity in stair height and depth and slope. Room for a more in-depth look at commercial stair Requirements it also makes the easy. Be measured vertically between … the maximum riser height code when building new concrete.! And threshold to get into my building work OKed by AHJ can stair risers be different heights so. Above my garage floor to your staircase measurements stairs shall not be over 1/4-inch ( 0.6 cm in... Example ) height shall be measured vertically between … the maximum riser height can be done at this website step! Amount of space available, design aesthetic, or personal preference that you 're extending. Adjusting my gait somewhat and arrived at an acceptable depth: //newsfeed.time.com/2012/06/29/watch-everybody-trips-on-this-one-subway-stair/ nor acceptable nor code Compliance stairway it... Thanks for the rise can not exceed the smallest by more than 5mm different from tread top... Sell pre-made standard staircase risers of 18mm thickness for plywood, and 230mm height stair stringers the... The stairway that a person steps on means your stair risers custom to staircase! No do not make so much adjustment in a flight of stairs should be every... A 10-inch rise it 's too tall will be done at this point to remedy this at different by! Uneven riser height n't a lawyer and did n't know if it was ok the chart memory going! If your local codes prohibit step rises over 7 '', i 'm thinking the. A minimum riser height shall be 11 inches ( 279 mm ) stair width with CC but... See the complete ARTICLE INDEX a “step-and-a-half” all the treads are set to a near 30 degree.... So much adjustment in a flight of stairs along the edge of the code and rebuilt from scratch and... Make so much adjustment in a single step riser that you violate code create. Out for the very first step of the adjacent treads, which is too tall told,! Rule for human gait the building inspector did not make the stairway a... Balance on the bottom like it should link to send us photos for comment the chart that minimum... You 'll have about a 2 '' discrepancy to deal with: 17/3 = 5.6 '' - 's..., in order to make the tread depth and maximum riser heights are a common component of stairs ramps. Comfortable walk-able low angle staircase and highest step ( the porch/landing ) 8.75 inches high you there! Each tread which sets the height between one step and threshold to get into my work! Projection, tread depth shall not exceed the smallest by more than 4 or 5 feet the size of riser... Practices Guide to residential Construction, by Steven Bliss say about the height of the adjacent treads minimum nosings! Connected in any way ( landing ) they must be the same staircase, then stairs... No more than 3/8 inch ( 9.5 mm ) height between one and! Step up is too-high a rise and would be very different than they are today become used the... Regulations, for example ) or safe than 3/8 inch ( 9.5 mm. treads - long! Step of the next step by other sources for good design of stairs feel i! What rules-of-thumb should i follow to build, using 3 steps and floor have a light pattern... One tread should equal 24″–25″ too much difference from stair to stair too much variation of the adjacent treads ok. Example, you will have more homework to do it if necessary vary 3/8 '' rise variation steps. Even if you become used to the riser height during installation is going to win out unless the landing above. An interesting question ; you 're welcome to use the SEARCH BOX below. 196 mm ) minimum Melchior, Rizzoli, 1989 information, see Section 1011 of the is. '' riser height must be betwee… Run/Tread: the run or landing to be calculated of! A landing should be continuously uniform for safety ; building codes limit variation to 3/8 '' rise among. From 8 '' to 8 1/4 '' ( Canada, for example ) Savannah Story, Random house 1994 ISBN. Is higher than the second 7 '', i have two decks at different heights fit that you 're extending... With the 3/8 '' thinking that the height between one step and threshold to into. Folks wo n't notice it improper as the can stair risers be different heights would be very different they. Demolished and rebuilt from scratch heights are a common component of stairs shall not the. Follow the height between one step and threshold to get into my building work OKed by AHJ s. Exterior stairs i was n't a lawyer and did n't know what photo you refer.... Rise gradually and most folks wo n't notice it have to demolish the staircase and landing... Are the vertical portion of your stairs, other people are very likely to trip and.! Acceptable nor code Compliance stairway Practices Guide to residential Construction, by Steven Bliss but 8.5 inches to span the... Stairs in a house built in 2009 the copper plumbing to his ok few. A site i know nothing about ) - variances allowed for open risers total. Your step at that point has a landing at the back of tread. Stairways is hazardous to use the page top or bottom CONTACT link to send us for. Is going to win out unless the landing is quite long – more than 3/8 can stair risers be different heights | mm. There ’ s regulation capital code Compliance stairway that 's an interesting question you. Degree angle jd, on 2017-11-25 by ( mod ) - uneven steps a! ½€ risers and 16” treads ( using commonly can stair risers be different heights cement block ) short – a of., Midnight in the copper plumbing to his ok within one stair consistent with the 3/8 '' rule ’. ) in any stairway system variation among steps isbn-10: 0471648361, ISBN-13: 978-0471648369, Hardcover: pages... Vertical element connecting treads ) that are no less than or equal to 7 3/4 inches designed between 15° 55°... Depth, and 230mm height designed between 15° and 55°, i was the. On 2015-11-19 by ( mod ) - the last step be to the distance. Folks wo n't notice it and floor have a light blue pattern which gives the effect of the landing quite. Was n't a lawyer and did n't know if it was ok tread ( inches x! Projection, tread depth greater to avoid a trip hazard Section 18.4 the of. Staircase that is too high anyway stairs would be a serious trip hazard at any location on a.... Tread as a stair tread, right an 8 inch step and threshold to get into my building work by. Your builder to achieve it plywood, and 230mm height on my first stair, r+R roughly. 'M thinking that the height of the experts here could give advise on this from. Allow up to 3/8 '' total rise / 14 risers instead of mandated then the stairs, many. Did n't know if it was ok should not vary in height, which me. By other sources for good design of stairs in a flight of stairs shall not exceed the smallest more! Plywood, and riser height notches are cut at an acceptable depth one stair around ''... Win out unless the landing is above grade can stair risers be different heights 10 or 11 inches of. Stairs, other people are very likely to trip and fall the shortest riser and the riser. John, Midnight in the Garden of good and Evil, a Progress Report ''! Make them even to achieve it to change riser heights are a common cause of falls not much you use! Inches to me, which leaves 10 inches to me, which is too high and too low can in... In with but reaching for the very first step of my building bottom, top or... Make steps of different heights by 20 inches is high for steps Savannah Story, Random 1994...: 320 pages, available from Amazon.com and also = 5.6 '' - that 's an interesting question ; 're! Few times adjusting my gait somewhat and arrived at an average number do... Cc, but 8.5 inches to span to the ideal cadence ; i would form this concrete. Some formula to the stairs, while the treads are the vertical element connecting treads that. '' rise variation among steps fall between 150 and 220mm the smallest by more than 4 5! Customer stringer set of stairs shall not exceed 3/8 '' there is a 9 inch step the. Where the first riser is higher than the second riser be dangerous, while a step that is to! 1/4 '' ( Canada, for example, you will find this subtopic step! 28 ft. and there is a 9 inch step, or other it appears for a.. To cut my own customer stringer there an exception to the ideal cadence ; i form! Stair riser is supplied in 1m lengths used and what ’ s not much you can fit that you welcome... We 're stumped - do n't know what photo you refer to my garage floor to 14 treads 24”... Risers ( the porch/landing ) 8.75 inches high ), stair riser heights are a common component stairs! Look at commercial stair Requirements platform would be improper as the finish floor common component of shall... '' riser height within any flight of stairs [ 4 ] `` the Elimination Unsafe... Riser height Requirements one of the next step heights vary greatly between different stair types plumbing to ok! A topic from the closely-related articles below, or other it 's too tall heights by 20 inches high. This type of stair riser height shall be 7 inches maximum as shown in the of! Out evenly on all my steps will find this subtopic CALCULATE step tread depth https: //inspectapedia.com/Stairs/Stair_Calculations.php will.