[26] >Steps and Stairways, Cleo Baldon & Ib Melchior, Rizzoli, 1989. The going must be betwee… For more information, see Section 1011 of the 2015 International Building Code for a more in-depth look at commercial stair requirements. I am considering 3 ½” risers and 16” treads (using commonly available cement block). We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. The stair stringers in the photo are were installed upside down and the notches are cut at an acceptable depth. 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 current step is 7 inches in height, which leaves 10 inches to span to the kitchen. The greatest riser height within any flight of stairs shall not exceed the smallest by more than 3/8 inch (9.5 mm.) Here's a quiz question / conundrum There's a typical exterior run of stairs in a house built in 2009. The maximum riser height shall be 8 1/4 inches (209 mm). Usually this is one wooden piece that’s uniform throughout the staircase. Is there any other way of correcting it? Let me attempt to clarify the question. This is a single-family house in NYC. 633.55 KB Walkways, i.e. Today, he was pouring the concrete for the porch/landing and it was about 85% poured, when he called me over to show me something. - Tom 6/23/12. Riser (inches) x Tread (inches) = 72”-75”. How high should the last step be to the bootem floor? Then select the concrete stairs, go to Properties Palette, … Why would you do that? As long as each independent set is consistent with the 3/8" rule there’s not much you can say, IMO. I lost my balance on the bottom step of 3 steps at a local library. I hired a contractor, who has demolished everything and is currently in the process of building it back. 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. You can see from the chart that the minimum tread depth and maximum riser heights vary greatly between different stair types. It pushes the whole stairway out by the depth of the stair tread in move that would be unnecessary - but then I can't see your situation, perhaps I'm missing something. I am going back Frank. Let's use 13.94" total rise / 13 risers = 7.23" individual riser height. (Courtesy Arlene Puentes). It appears for a certainty that nothing will be done about making the steps safe. I told him, I wasn't a lawyer and didn't know if it was ok. You can change the rise gradually and most folks won't notice it. In Canada the rise can not be more than 5mm different from tread to tread. In this case they are existing stairs and we can mandate the height required (unless of course the existing drawings were not calculated correctly). He told me that every step was exactly 8 inches high, except that the last and highest step (the porch/landing) would be 8.75 inches high. What’s the rule ? ..jd, On 2017-11-25 by (mod) - fine tuning step riser height. Sounds like you'll have about a 2" discrepancy to deal with. The reason for this is that as all the treads are set to a near 30 degree angle. sidewalks, are not stairs. Anon ALL of the steps in a flight of stairs should be the same height. Minimum 11 inch stair tread depth. Almost exactly six years ago, I wrote a poston a carpentry hack that resolved a problem I had with a stairway after a contractor installed an insulated floor in my basement. -osha.gov/doc/outreachtraining/htmlfiles/stairlad.html, ARTICLE INDEX to STAIRS RAILINGS LANDINGS RAMPS, Stairways and Ladders, A Guide to OSHA Rules, HOME INSPECTION EDUCATION COURESES (Canada), HOME INSPECTION EDUCATION: HOME STUDY COURSES. What rules-of-thumb should I follow to build a comfortable walk-able low angle staircase? Stair riser height & construction questions & answers: Frequently-asked questions about proper height for stair risers or step heights when building or repairing stairs. Otherwise the steps are a trip-fall hazard. [/size][/FONT], Powered by Discourse, best viewed with JavaScript enabled, http://www.g-w.com/pdf/sampchap/9781590706480_ch18.pdf. Think about going DOWN the steps and where your toes are now. What can I do, On 2017-01-11 The IRC limit gives an r+R of 17 ¾”—pretty darn close to 18. Should the risers be the same height ? 2008 NYS Stair Code: R311.5.3.1 - Stair Riser height Requirements. 126. riser height is 4 ‘’ and max riser and tread differential is 3/8 ‘’. Difference between tallest and shortest riser cannot exceed 3/8". Stair tread depths shall be 11 inches (279 mm) minimum. Freddy Let's do a back-of-the-envelope calculation. Stair riser heights shall be 7 inches (178 mm) maximum and 4 inches (102 mm) minimum. Is there anything that can be done at this point to remedy this? Stair risers are used in staircases all over the world. The key is to eliminate any variation over about 1/8" to prevent tripping. I am legally disabled. That's an interesting question; you're basically extending the floor area by the width of a stair tread, right? The allowable variations of nosing projection, tread depth, and riser height apply to each stairway separately. Stair risers are a common component of stairs, but many will make changes to the height of risers, called the rise. Or is the riser height discrepancy not that big of a deal? The sum of two risers and one tread should Staircase Width: 36 Inches, Minimum. 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. Note: appearance of your Comment below may be delayed: if your comment contains an image, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. 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. I full understand Bradley. 1. Both stairs that are too high and too low can result in a staircase that is uncomfortable to climb. 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. 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. STAIR WIDTH. What are the rules for a low angle staircase? Demolishing it all and beginning again would be a big job, but I will instruct him to do it if necessary. Risers (the vertical element connecting treads) that are no less than 6 inches in height and no more than 7.5 inches. Another possibility might include a landing midway up thus making all the treads shorter? 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