Next measure width and depth of the stair for a precision fit. In terms of specifying a manufactured nosing, all of these details must be provided for to assure both compliance with the standard and that there is no protruding lip that could be a tripping hazard. Some have interpreted this in different ways, but the stair industry has responded by providing a 3-inch nosing that can have all or any 2-inch part of it treated with a contrasting color. Cast products typically don't offer many other choices beyond size, but extruded products offer numerous other options including the following: Single-part products. The abrasive aluminum oxide in treads and nosings can be specified in as many as nine common colors including black, safety yellow, brown, gray, red, burgundy, orange, green, and blue. When needed, scrub surfaces vigorously with a stiff bristled brush using a mild detergent but do not use any product containing solvents such as acetone. Further, aggressive finishing and overflow of the concrete has the potential to crack a full abrasive tread or nosing or dislodge the abrasive material from the treads altogether. Zamma has launched Cap-A-Tread, an innovative, durable laminated stair renewal system which allows homeowners and professional installers to dramatically update the look, feel, and quality of stairways, … When it comes to individual components of stairs and stairways, codes don't typically provide a definition of a stair tread, but it is commonly defined as simply the flat, horizontal portion of a stair that a person places their foot upon (as in stepping upon or treading upon it). Maybe I'm being picky, but do you have any other ideas for how I might address this? On wooden steps, renovation treads are fastened with wood screws. Parametric modeling capability. The nature of extrusion manufacturing, however, does not lend itself to a curved stair tread with a radius shape. Steel pan installation. Item #874724 Model #SC50SLVF603 They may also include a diamond or crosshatch safety pattern in the aluminum for greater slip resistance. Nosings or treads are set into the concrete supported by the steel pan. It also reveals in three dimensions places that are in conflict so they can be resolved during design rather than the more costly resolution during construction. Once all of the aluminum products are staged for installation and the concrete forms or metal pans are ready, then the concrete should be poured. The use of a BIM model will help everyone on the design and construction team visualize a finished stair and safety tread installation while avoiding potential conflicts of materials in the field. For example, inserting a tread into a stair means that the concrete stair has to change to accommodate it. I have seen some videos posted on you tube showing preparing the stairs by first cutting off the overhang so the current stair tread is flush with the risers, but it would seem then that the attached nose of the cap-a-tread would be unsupported by any solid piece of wood. Let me know if you have any further questions. Clearly, then, there are numerous sources of requirements and safety standards that can be consulted on stair design and on treads and nosings in particular. They also meet a reasonable standard of care for providing safe environments as part of architectural practice. A contrasting color can be applied to the leading edge of ribbed treads in any color combination. For purposes of this article, all of these elements of defining stairs, stairways, and treads and nosings apply. It is also possible to use “full abrasive” treads and nosings which have the abrasive material covering over the top of the extrusions so that only the abrasive material is seen. Minimum 10 inch stair tread depth with nosing or Minimum 11 inches with no nosing. Discover how Zamma … Manufactured safety treads and nosings are available to be incorporated into stairs in literally dozens of styles of extruded aluminum and cast type products. the laminate flooring I laid on the landing with the first step down (9 steps to the main floor). They go on to define a stairway as “one or more flights of stairs” and also include “the necessary landings and platforms connecting them, to form a continuous and uninterrupted passage from one level to another.” Hence a stairway is the total assembly connecting levels within a building. Building Information Modeling (BIM) for Treads and Nosings. I am installing Cap-A-Tread on my home's main floor stairs. For attachment to metal steps, bolts and nuts or self-tapping screws can be used. The depth, or the distance from the front of the tread to the back, is part of the run calculation in building steps. Item #874724 Model #SC50SLVF603 For commercial and institutional buildings with moderate to high levels of foot traffic, extruded aluminum nosings and treads are often selected for both interior and exterior locations. On any type of exterior stair, most manufacturers recommend stainless steel fasteners. Scuff marks on the aluminum nose can be removed by rubbing with a fine steel wool and a commercial cleaning agent. All of these metal options include the ability to specify recycled content since they are very common building materials. It is important to note, however, that while these codes apply in the majority of states in the U.S., some states have adopted either revised editions of these codes or still use their own independent codes. 2/3) There are treads with an open left or right available. The riser below can be angled back from the nosing provided that angle is no more than 30 degrees and the projection remains within the 1-1/2-inch maximum. Over 9100 different stair parts in dozens of wood species and sizes. Since residential stair tread nosing is made to look attractive, you’ll also want to choose the right shape for your stairs. Wood treads and risers are typically installed by a stair … In the late 1800s, cast metal was introduced into stair design to help address some of these issues by providing stronger and more durable components, particularly on stair treads, making them less susceptible to problems. Length x 12-1/8 in. In writing the specifications for treads and nosings, there are numerous points to consider and understand so that the correct products are called for. These are the most commonly used tread and nosing products. If cutting is necessary, then consider just adding the cap and installing a small trim piece at the back of the stair to hide the difference. In the case of walking surfaces ASTM F1637 is the published standard available. In cases where only the nosing is desired to be added, they are available in different widths and styles. It is common for manufactured treads and nosings to achieve coefficient of friction levels on the order of 0.98 – 1.02 or well above the minimum called for. I believe the reason for rounding the leading edge of the tread … Adhesive. This action will prevent the occurrence of hollows and voids, which can lead to flexing and cantilevering of the nosing. Not all of these materials or stair assemblies held up well as the building was used over time with surfaces becoming worn, damaged, or as assemblies settled or became loose. Three- and four-inch nosing widths are standard since 3-inch or larger nosings will satisfy the requirements of virtually all codes and standards. Peter J. Arsenault, FAIA, NCARB, LEED AP, practices, consults, and writes about sustainable design and practice solutions nationwide. For renovation stair tread installation, the industry standard is to provide a 9-inch-deep renovation tread on each step and an 11-inch-deep tread at the top of each run at each intermediate landing. Installation is easy, … As distinct elements, they can be added to the supporting material of wood, concrete, or steel that the stairs are made from. Commonly this is a full tread application that sets into or over the wood. Two-stage nosing used in metal pan concrete filled stairs. Obviously, all of these adverse conditions need to be avoided. Hi, I am installing Pergo Out last plus in Scraped Auburn Oak on my floors and I am using the Cap a tread system to cover my stairs. From the 2009 IBC: R322.214.171.124 Profile. Specifically in Section 1910.24f of their standards, it states, “All treads shall be reasonably slip-resistant and the nosings shall be of nonslip finish. The codes address the size and depth of the nosing for different stair profiles and call for them to provide a degree of slip resistance along their surface. Note however that repair kits are primarily for aesthetic purposes and do not offer the same stability of treads manufactured at the factory. Hence the same is true with building products that are inserted as objects into that model. www.nystrom.com, Originally published in Architectural Record, Occupational Safety and Health Administration (OSHA), ASTM F1637 Standard Practice for Safe Walking Surfaces. These products are also available as flat pieces without any nosing for use in ramps to provide the needed slip resistance for handicapped accessible and other sloped walking surface situations. This is easily revealed by comparing the computerized object to photos or samples of the physical object and looking for similarities and discrepancies in details and features. Another question on the installation of the cap-a-tread. Then make sure the area is clean and dry. For cast concrete or metal pan concrete filled stairs, the installation may require a bit more diligence for a successful outcome. In some interior locations an alternative to cast aluminum is high-quality gray cast iron that complies with ASTM A-48-70. Deep x 1-11/16 in. I used a simple oak reducer strip that I stained to the color that best matched. This alloy contains about 97 percent aluminum mixed with small amounts of other metals including chromium, copper, iron, magnesium, manganese, silicon, titanium, and zinc. Right: The stairs—with new renovation treads installed—have been restored to a safe condition. Tape must be removed immediately after the stair tread is set, however, so it only offers very short-term protection. Among the most significant safety details to be addressed are the proper design and specifications for treads and nosings installed in a variety of locations and construction types. Identify the types of manufactured stair treads and nosings that are available including options to specify for best performance in particular applications. If not, is it recommended to miter the tread? Beyond the functional walking aspects of treads and risers, the Standard adds a visual requirement in Section 504.5.1. Unfinished and prefinished stair … The Standard and codes do not quantify slip resistance, but the ADA does recommend a coefficient of friction level of .60 or above for walkways and .80 for ramps. It calls for the same 2-inch-wide contrasting color strip but specifies that it must be within an inch of the front of the nose of the stair. 8 are 41" long with 1.5 inch … Where full cast aluminum treads are desired, the nosing is typically integral to the product along the leading edge. Accurate visual representation. Building codes commonly define a stair as “a change in elevation, consisting of one or more risers” with a riser being the vertical portion of the individual steps. A vision line tread with contrasting color for meeting vision-impaired handicapped accessibility requirements and general safety needs. Then dry fit the cap a thread to the area, to make sure it is fits. Deep x 1-11/16 in. Further, they can be specified for both new and retrofit/renovation installations. Hi Maryan, welcome to the community. This is also a full tread installation that is designed to cover over de-teriorated concrete or wood stairs and restore them to a safe condition. Left: Concrete stairs show their deteriorated condition before using renovation treads. Thick The radius of curvature at the leading edge of the tread shall be no greater than 9/16 inch (14 mm). Investigate and compare proper installation strategies on different types of new and existing stair construction. So sorry for the delay on your question...I missed it. There are four basic choices available: Poured concrete stair installation. They are installed as one piece into poured concrete stairs, onto steel pan concrete filled stairs, or onto wood stairs. A range of anchor options are typically available including wood screws for wood stair applications, wing anchors with machine screws for concrete or steel pan applications, and nylon expansion shields with screws for renovation treads installed into existing concrete. Other requirements in the Standard for floor surfaces include being level within a slope of 1:48 and any openings in the surface must not allow passage of a ½-inch diameter sphere. That is what is meant by interoperability—the ability to access complete and accurate information regardless of the source of the different parts of the information. These examples of extruded aluminum nosings show a ribbed profile (top) and a full abrasive profile (bottom). Length x 12-1/8 in. Stair nosings are a distinct part of a tread that building codes define as “the leading edge of stair treads.” Nosings also apply to the leading edge of landings at the top of stairway flights. Complete and open interoperability. Just noticed the new cap a tread products, looks easy enough to install however..any info on how to? Explore successful cleaning and maintenance methods required for ongoing safe and slip-resistant stair treads and walkways. SMARTCORE Ultra 2.07-in x 94.49-in Blue Ridge Pine Unfinished Pine Stair Nosing. Learning Objectives - Over filling or over spraying of concrete in metal pan stairs can damage the stair nosings and render their slip resistance to be compromised. Option 2. Clearly, this is meant to help visually impaired people as well as improve the general safety of everyone. The remodel riser should be flush with the bullnose of the existing stair tread. The difference in spacing (thanks to the landing and the top floor step) looks "odd." You would not need these trim pieces if your steps are made of a stair tread … I have provided an installation guide for the cap a thread and for risers. This is done, so a flat landing is not used. I attached it to the edge with the low taper at the step. For masonry steps, expansion shields and screws are typical. In extruded shapes, this abrasive material is commonly a combination of aluminum oxide and a two-part epoxy which provides a durable slip-resistant surface for walking on. The cast aluminum will take the brunt of the traffic and any abuse, thus protecting and preserving the concrete beneath it and helping to ensure a well-maintained stair that remains intact and safe over time. It addresses indoor and outdoor walking surfaces indicating that walkway surfaces shall be slip resistant under expected environmental conditions and use. Typically, this means a slightly different edge condition to assure that there is no lip protruding past the metal riser that might cause a tripping hazard.
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