The International Building Code (IBC) is the most widely-adopted model code for commercial construction in the US. If the handrail is not circular, it shall have a perimeter dimension of at least 4 inches (102 mm) and not greater than 6.25 inches (159 mm) with a maximum cross-section dimension of 2.25 inches (57 mm). Stair tread depths shall be 11 inches (279 mm) minimum. 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. A very common contributing factor is neglecting to use handrails. The width of stairways shall be determined as specified in section 1005.1, but such width shall not be less than 44 inches (1118mm). STAIR WIDTH. The guard must be at least 30 inches above the floor of the landing or balcony. [Click to enlarge any image]. IBC 1009.7.5 NOSING AND RISER PROFILE Risers shall be solid and vertical or sloped under the tread above [IBC 1009.7.5]. The tread depth shall be measured horizontally between the vertical planes of the foremost projection of adjacent treads and at a right angle to the tread's leading edge. Figure 4 (left) shows the recommended cross-section and dimensions of a good handrail. This includes ensuring that the correct dimensions are being used, based on the type of building. For example, if your total height is 53 inches and your unit rise is 7 inches, dividing these will bring a dimension of 7.57. Stair Code Example – Source BOCA 2001 stair construction code details: home improvement and repair website. This article series lists all major building code specifications for stairs, railings, landings, and guardrails - information useful for constructing or inspecting indoor or outdoor stairs, railings, landings, & treads, and for evaluating stairways and railings for safety and proper When it comes to commercial stair standards, the International Building Code (IBC) establishes the minimum requirements for stairs to insure a level of safety to the public. Commentary: Handrails are required on all stairs more than four risers in height. John Wiley & Sons, 2004. p.244. [3] "The Elimination of Unsafe Guardrails, a Progress Report," Elliott O. Stephenson. ISBN-10: 0471648361, ISBN-13: 978-0471648369, Hardcover: 320 pages, available from Amazon.com and also. 2012 International Building Code IBC . International Building Code 2000 (BOCA, ICBO, SBCCI) Stair & Railing Codes 1003.3.3.4 Stairway Landing Codes There shall be a floor or landing at the top and bottom of each stairway. (1) The provisions of Chapters 2-29 and 31-35 of the "International Building Code," except that in occupancies in Use Group R-3 and within dwelling units in occupancies in Use Group R-2 the maximum riser height shall be 8¼ inches (210 mm) and the minimum tread depth shall be 9 When doors open directly into the stairwell, a 50 cm-wide platform should be provided beyond the swing of the door. Need to i... Building header for angled wall opening under stairs... Hi - We cut an opening in two walls under a staircase. Spiral stairways that will not be a permanent part of the structure may not be used by workers. Even if you don’t necessarily have to meet code in this case, you can only help your chances of selling your house and bumping up the value by installing a code stair. BUILDING CODE DOWNLOADS - free downloadable PDF files of building codes & standards. 126. Be very cautious on stairs if you are wearing bifocal glasses. 7/26/90 is very often cited by other sources for good design of stairs and ramps etc. The International Building Code (IBC) has many requirements for stairways, and you must also meet the required number of means of egress and areas of refuge for wheelchairs. A nosing not less than 3 / 4 inch (19 mm) but not more than 1 1 / 4 inch (32 mm) shall be provided on stairways with solid risers. }, [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. ADA (Americans with Disabilities Act), Public Law 101-336. This topping can be somewhere between 1 to 3 inches. The recommended maximum number of steps between landings is 18, with no more than two flights without a change of direction. The minimum tread depth shall be 9 inches (229 mm). Broken or malfunctioning lighting should be repaired or replaced. We provide photographs, sketches, and examples of defects used in inspecting indoor or outdoor stairs, railings, landings, treads, and related conditions for safety and proper construction. 1009.3 Stair treads and risers. "The Elimination of Unsafe Guardrails, a Progress Report," Elliott O. Stephenson. Spills, wet spots, or any debris should be immediately cleaned up. Copyright© Use any means to persuade people to grasp the handrail while both ascending or descending stairs. Do not carry bulky objects that block your vision. This reduction has been incorporated to minimize injury to children, who could crawl between the normally allowed 8 inches, causing injury to them. These standards for building stairs and ladder systems are set up by OSHA and IBC. Edges shall have a minimum radius of 0.125 inch (3.2 mm). Maps for I-Code Adoption information; State & Local Adoptions; As a model code, the IBC is intended to be adopted in accordance with the laws and procedures of a governmental jurisdiction. Improving visibility on stairs significantly reduces the risk for common mishaps caused by misjudging distances. -osha.gov/doc/outreachtraining/htmlfiles/stairlad.html, CANADIAN OCCUPATIONAL SAFETY REGULATIONS - Stairways & Fall Prevention, IEBC INTERNATIONAL EXISTING BUILDING CODE, INTERNATIONAL BUILDING CODE 2000 (BOCA, ICBO, SBCCI), IRELAND (Northern Ireland) STAIR GUARD LANDING RAMP CODE, NEW YORK STATE RESIDENTIAL BUILDING CODE - Stair Design Specifications, US BOCA NATIONAL PROPERTY MAINTENANCE CODE, US OSHA REGULATIONS for TEMPORARY STAIRS & RAILINGS, US OSHA REGULATIONS for STAIR RAILINGS & GUARDRAILS, International Residential Code® For One- and Two- Family Dwellings, 2006, International Residential Code® for One- and Two- Family Dwellings, 2012, Subtitle B - REGULATIONS Relating to Housing and Urban Development (Continued), ALGAE ICE FUNGS WET Surfaces & Other Stair Slip, Trip & Fall Hazards, ALASKA, JUNEAU SPIRAL, CURVED and WINDER STAIRS, WASHINGTON STATE STAIR CODE WAC 296-155-477, CABLE RAILING CODES, OPENINGS, LADDER EFFECT, MODEL & SPECIFIC BUILDING CODE CITATIONS FOR STAIRS & RAILINGS, 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. Imagine having a 12’ high stair in place with a riser height of 9” and a tread depth of 9”. Commercial Stairs Built for the General Public. The greatest riser height within any flight of stairs shall not exceed the smallest by more than 3 / 8 inch (9.5 mm). Such a surface can be made of rubber, or metal or painted with special slip-resistant paint. Learn more → Building Confidence, Building … Figure 1 shows the recommended dimension ranges for all the important elements of stairways. Width and Capacity (IBC 1011.2) The number of occupants on each floor will determine the required width of the stairs. The American National Council on Compensation Insurance estimated in 2001-2002 that the cost of such fall injuries was second only to those caused by motor vehicles. [14a] "Visual Interpretation Of The International Residential Code (IRC) 2006 Stair Building Code", The Stairway Manufacturers Association, [Portions of this document reproduce sections from the 2006 International Residential Code, International Code Council, Falls Church, Virginia. Beveling of nosing shall not exceed 1 / 2 inch (12.7 mm). These specifications show standard stair dimensions for height, tread degree, rotation degree, and many more details for each Salter Spiral Stair product type. Use matte finishes on the treads to avoid glare. The prime function of the handrail is for holding as support while going up or down stairs. Handrail assemblies and guards shall be able to resist a single concentrated load of 200 pounds (0.89kN), applied in any direction at any point along the top, and have attachment devices and supporting structure to transfer this loading to appropriate structural elements of the building. We compare stair and railing code requirements for various model, national, state and local building codes and we include explicit text & specifications from those building codes. Recent building code revisions have reduced the openings between balusters to not larger than 4 inches. The International Code Council (ICC) supervises many various codes, including two which are specific to stairs. Several components are looked at such as stair width, headroom, riser and tread heights. This document provides the foundation for many state and city codes. Lighting requirements for stairs & landings: specifications & codes Stairway & Lighting & Light Switch Placement Requirements List of Common Stair Lighting Defects. Good housekeeping is also vital to stair safety: Continue reading at STAIR DIMENSIONS, WIDTH, HEIGHT or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. The normally prescribed width in residences is approximately 2 feet, 8 inches, but where 3 feet is better, 3 feet, 6 inches is recommended for a normal occupancy standard. These data demonstrate that work on and around ladders and stairways is hazardous. Other sources (cited in the two articles listed just below) cite a coefficient of friction of 0.5 (OSHA) or 0.6 (ADA) as the minimum recommended COF to avoid slippery walking surfaces and stairways. These are two "model" codes and are offered as suggested guidelines for local code authorities to follow at their discretion. to this site, and use it for non-commercial use subject to our terms of use. Our spiral stair building code and IBC stair code specifications provide technical details about the different code and non-code packages we offer for commercial and residential projects. Above; minimum tread dimensions for a Curved stairway, adapted from the 2006 IRC as published by Juneau AK IRC R311.5. The maximum riser height shall be 8 1 / 4 inches (209 mm). STAIRWAYS - see OSHA at referencesThe following general requirements apply to all stairways used during the process of construction, as indicated: Stairs of all types have been used since ancient times, and because they are inherently hazardous, people have been falling on them, getting hurt or even killed in the process. Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. See code requirements for nosings, riser designs, uniformity and additional exceptions. Or see BUILDING CODES for STAIRS FAQs - questions and answers about stair building codes that were posted originally on this page. ), [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. Risers shall be vertical or sloped from the underside of the leading edge of the tread above at an angle not more than 30 (0.51 rad) degrees from the vertical. Commentary: Handrails, treads and risers must be structurally sound, firmly attached to the structure, and properly maintained to perform their intended function safely. Because stairway accidents can cause severe injury and even death, building codes for stairs and ramps are justifiably very rigorous. Slippery conditions on stairways must be corrected. The Difference Between IBC and OSHA Stair Codes. Building stairs under the International Building Code provides measurements that have existed since early Roman times. When building a stair or ladder system in your facility, there will more than likely be a few standards for the structure to meet in order for it to satisfy your building codes. This stair … In order to build stairs, a calculation for a stair stringer (to what the unit run and unit rise attach) must be obtained. see section 1007.3 for accessible means of … Stairs within dwelling units may have a maximum rise of 7 ¾ inches and a minimum run of 10 inches. The best approach to minimize the hazard of falling down stairs is to encourage the building of well-designed stairways, combined with training focused on raising our awareness of the potential for disaster. The depth of any landing should be at least equal to the width of the stairs. EXISTING BUILDING. Guards shall be not less than 30 inches (762mm) high above the floor of the landing or balcony. The greatest nosing projection shall not exceed the smallest nosing projection by more than 3 / 8 inch (9.5 mm) between two stories, including the nosing at the level of floors and landings. Staircase width refers to the side-to-side distance if you were … The dimension of risers or treads in a stairway should not vary more than 1 cm. Section 1009 Stairways . BUILDING CODES for STAIRS at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. [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, Where doors or gates open directly onto a stairway, a platform must be provided that is at least 20 inches (51 cm) in width beyond the swing of the door. Adoptions of the IBC. Colorado has adopted the International Code Council's guidelines for these regulations. 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