Stair tread is 11 and riser is 7 unless your stair meets exceptionsand nosings are 1". Watch out: it's confusing but many people refer to stair tread depth as stair step or tread width, including our Canadian stair dimension illustration just below. McNICHOLS ® Nosing, most commonly welded to the leading edge of a Bar Grating Stair Tread, is a 90 o angled product intended to help with slip resistance and step sightlines. You are not required to have an nosing/overhang on your stair treads. Standard stair nosing with a 50mm strip and maximum 10mm front extension on a square corner. It reduce the risk of slipping thanks to it`s non-slip surface. 1) The recommended dimensions of Stair Nosings: Building Regs (K&M), BS8300 and BS9266 These state that the tread should measure between 50-65mm and the riser 30-55mm. There are other treatments that can be applied to outdoor wood decks, balconies, rails, such as preservative stains (recommended by manufacturers but not required by codes). STAIRS, RAILINGS, LANDINGS, RAMPS - INSPECTIONS, CODES, ALGAE, ICE, FUNGUS, WET Surfaces & Other Stair Slip, Trip & Fall Hazards, STAIR DESIGNS for UNEVEN / SLOPED SURFACES, STAIR CONSTRUCTION, SPECIFIC ANGLE or SLOPE, 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. Option of hot-melt adhesive stripes for fixing to floor. Continue reading at STAIR TREAD NOSE SPECIFICATIONS or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. 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. In fact the author (DF) tripped on this very step, located in a hotel in Tapalpa, Mexico. The anti-slip tapes used in the step profile. (Courtesy Arlene Puentes). Stair tread depths shall be 11 inches (279 mm) minimum. Above: the very tall step riser heights at a Becan pyramid are, nonetheless, easier to climb up than down. We haven't established if the break occurred at the time of the fall or prior to it, but I consider it most likely that at least part of the tread nose was broken away before the fall because I observe breakaway of several inches on both sides, left and right, of the knot - not something that would be likely to occur by a single event of a single foot pressure over that area. Had modern tourists had instead been among been the Mayan people having to carry and place the stones to build th huge pyramid (shown below) in 550 BCE, we might have understood the appeal of making steps narrow, and tall, so as to ascend to the required height with fewer trips to the quarry. In the articles in this series and in the references section of each article we cite model codes and specific ones too.A citation for your 10 inch depth will be welcomed. Below: where the walking surface and stair tread surfaces are the same color and appearance, falls are more likely. Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia. Commercial Solid Protection Stair Nosing (SC16) SC16 stair nosing is a solid tread suitable for repair of broken step edges or to offer effective protection of stairs with heavy foot traffic. However it makes perfect sense and certain environments. - IBC 1002 [14a], Details about the proper design of stair tread nosings in shape & dimensions as well as history, research & stair tread nose hazard discussion are. ADA (Americans with Disabilities Act), Public Law 101-336. In addition, increase in run length and decrease in riser height tended to reduce forward upper body tilt. "Should we consider steps with variable height for a safer stair negotiation in older adults?." Stair treads, from side to side, cannot change in level. [3] "The Elimination of Unsafe Guardrails, a Progress Report," Elliott O. Stephenson. [copy on file as http://www.stairways.org/pdf/2006%20Stair%20IRC%20SCREEN.pdf ] -. Stair noses are indeed an interesting question since in some countries and jurisdictions experts do not agree that a stair nose reduces trips and falls. It is available with a 74mm wide SC-R solid carborundum or carborundum anti slip tape insert. Finishing strip for concrete steps or directly on floor covering. Investigative ophthalmology & visual science 56, no. In our photo at above left, taken in a restaurant in Rhinebeck, New York, it is still not clear from the upper walking surface whether or not we are approaching a step. The stone steps up the pyramid shown above don't have a tread nose, and worse, the stones are irregular and worn, making falls more-likely. [2]. Step profile (stair nosing profiles) ensures a high level of safety for stairs. This is the tallest building in Becan, rising 32m above the plaza. -osha.gov/doc/outreachtraining/htmlfiles/stairlad.html. Ribbed anti-slip surface. from . A wide variety of stair nosing dimensions options are available to you, such as welding. When calculating the exact riser height from stair tread surface to stair tread surface we divide the total rise height (you say 5'6") in inches (yours would be 66") by a good riser height (say 7") to get the number of steps we need, and then decide how to spread the fraction uniformly over all of the steps. ‍ ‍ Riser and tread dimensions should be continuously uniform for safety; building codes limit variation to 3/8" | 10 mm. Stair nosing profiles  ensures a high level of safety for stairs.It is made from aluminium. [Click to enlarge any image]. Add to Wishlist | Add to Compare; Stair Nosing for 21mm Wide Oaks. Is that legal now? 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