Exception 1 in Section 1011.2 allows for a width of not less than 36 inches when a stairway is serving an occupant load of less than 50. The five components can be assembled in infinite ways, allowing you the flexibility to select a safety solution that will work best in your facility. Plans. var expert_count = Math.floor(Math.random() * 6) + 1; The IBC also dictates the rise and tread measurements for each individual step. Click here to view the building codes adopted by Montana ; International Building Code, 2018 Edition - Effective: December 7, 2019; International Residential Code, 2018 Edition - Effective: December 7, 2019 Instead, the Occupational Safety and Health Administration’s (OSHA) Fixed Industrial Stair regulations (1910.24) govern the design, construction and use of both interior and exterior stairs used to access equipment, machinery, tanks, elevated platforms, other floors or pits. But with so many types of stairs, how can you tell which standards yours need to follow? The tread is the depth of the step itself. For example, stairs manufactured with a 45-degree stairway rise must have a minimum rise and tread of 8.75 inches each. https://buildingcodetrainer.com/commercial-stair-codes-explained These regulations must account for the safety of every type of person — including children and the elderly. The new codes went into effect on June 1, 2020. However this does not include the wood handrails which can be permitted for all construction types.eval(ez_write_tag([[300,250],'buildingcodetrainer_com-large-mobile-banner-2','ezslot_13',115,'0','0'])); Unlike residential stairs that only require a handrail on one side, commercial stairs require handrails on both sides. IBC - International Building Code. The code establishes a maximum vertical height of 12 feet between landings or floor levels for a flight of stairs. Mechanic… The greatest tread depth within any flight of stairs shall not exceed the smallest by more than 3 / 8 inch (9.5 mm). Note that dimensions here should be taken excluding carpets, rugs, or runners. Get a quote, configure a custom stair or ask a question. 2012 IBC Houston Amendments - Print 2(adopted Sep. 1, 2018) 1.2. Whether you choose a commercial spiral or straight design, your commercial staircase will be safe and code compliant. All of the codes listed below are amended and adopted by Administrative Rules of Montana (ARM) Title 24, Chapter 301. Learn about Erectastep’s OSHA compliant stairs. As for rectangular stair treads the depth should not be less than 11 inches when measured horizontally between the vertical plane of the foremost projection of the adjacent tread and at a right angle to the tread’s nosing. Stairs can be designed to comply with different regulations depending on their intended environment. ErectaStep's Full Line of Prefabricated Metal Stairs, Fixed Industrial Stair regulations (1910.24), Falfurrias Capital Announces Strategic Investment in SixAxis, Conveyor Crossover Stair Installation – Improving productivity and safety for a well-known bottling facility, The Role of Access Catwalks and Mezzanine Systems in Industrial Safety, SixAxis Secures Utility & Design Patents on Ingenious ErectaStep Products. For open-sided walking surfaces like stairs and elevated platforms, handrails and guards are mandatory. OSHA stairs are required to be a minimum of 22 inches wide. Section 1011 refers us to Section 1005.1 to size the width of stair. Since we are talking about exceptions, let us go back and take a look at Section 1011. the Texas Administrative Code (TAC), Title 10, Part I, Chapter 20, the specific program rule in Title 10, or in the specific program NOFA, or the applicable federal regulations. International Code Council (ICC) Online Code Library. As a business, you want the most value out of your facility’s limited space, so it pays to invest in equipment that requires less square footage. Both handrails and guardrails must be capable of withstanding a minimum of 200 pounds of pressure applied from any direction at any point along the rails. Another important question is: what is stair nosing? Larger IBC measurements mean these stairs have a bigger footprint than OSHA stairs. The division works with building officials, technical committees, advisory boards, and the public to adopt, amend, and interpret the provisions of the OSSC. Stair riser heights shall be 7 inches (178 mm) maximum and 4 inches (102 mm) minimum. You need at least 80″ of head height measured off the tread nosings and it needs to be maintained for one additional riser depth at the bottom of the stairs. Now when … (2) Stairway headroom shall be not less than 1 950 mm plus the height of one riser measured vertically above the nosing of any tread or platform. The reason for this is that if it is determined per section 1005.1 that the width is less than 44, 44 inches shall be used as the minimum. The riser height must be between 4″ and 7″ and the treads must be at least 11″ deep. *This chart is for general reference. As for the depth of the landing, it shall have a minimum depth equal to the width of the stairway measured parallel to the direction of travel or 48 inches, whichever is less.eval(ez_write_tag([[300,250],'buildingcodetrainer_com-large-mobile-banner-1','ezslot_10',114,'0','0'])); For example if the width of a stairway is 44 inches, the landing shall be a minimum 44 inches in depth but if a stairway is 60 inches in width, the landing shall only need to be a minimum 48 inches in depth. Stair tread depths shall be 11 inches (279 mm) minimum. And IBC-compliant stairs can’t have any gaps between those handrails or guards that could allow a four-inch sphere to pass through. Rise and tread measurements are dictated by the angle of the stairway rise. The final authority on when and where railings (stair rails or guards and handrailings) are required on steps, stairs, landings, balconies and decks, rests with your local building code official. This clearance must be maintained above the stairway to the point where the line intersects the landing below to one tread depth beyond the bottom riser. Stairs that are higher than 12 feet tall require an intermediate landing in the middle of the stairway. 7″ closed riser, max 4″ open gap. Both OSHA and IBC require landings at the top and bottom of the stairs, although IBC landings are larger, typically 4′ square. The 2019 OSSC is based on the 2018 International Building Code (IBC). C. New Construction Building Code versus Existing Building Code. IBC also requires an intermediate landing on stairwells for stairwells over 12′ high, as well as handrail extensions at the bottom landing. Residential: 2012 IRC Houston Amendments(adopted Feb. 1, 2016) 3. STAIR WIDTH. Section 1005.1 outlines several egressing components, which is a topic of its own to discuss, but you can find the requirements specifically for stairways in Section 1005.3.1.eval(ez_write_tag([[300,250],'buildingcodetrainer_com-medrectangle-3','ezslot_1',107,'0','0'])); It states that the means of egress for stairs is calculated by multiplying the occupant load served by the stairs by a factor of 0.3 inch per occupant. The code requires that stairways be built of materials that are consistent with the types of materials permitted for the type of construction of the building it serves. Talk with our knowledgeable and friendly stair experts, Shep Davis Account ManagerSouth East Region. Also the risers must be solid and vertical or sloped under the tread above the underside of the nosing above at an angle of no more than 30 degrees from the vertical. It is the minimum construction standard throughout all of Minnesota. Risers for OSHA stairs are allowed to be open. Stair treads and stair risers can be made of a variety of materials with treads often having a partial or total surface with some non-slip properties for safe egress. an existing building related to an addition unless the provisions of this code specifically reference them and make them applicable. Balusters (vertical members in handrails), Space between balusters should be no more than 19″ (48 cm) apart, Space between balusters should be no more than 4″ apart. document.getElementById('interior-custom-configuration').src = source; Chat live with a knowledgeable and friendly stair expert now. These types of stairs are used in industrial settings, so they must be strong. IBC Stairs require guardrails of 42″ high and handrails of 34″ high on both sides of the stairwell. (Plus, ErectaStep’s stairs go above and beyond with a wider width and longer tread than the OSHA minimum – read more about our product specs here.). In order to determine this the code refers us to Section 1005.1, but before we look at this section the code does say that the minimum width shall not be less than 44 inches. (Title 24, Part 2, Section 3305 (o).) Building Codes & Regulations 401 South Spring Street 3rd Floor, Stratton Building Springfield, IL 62706. (Also keep in mind that any IBC stair higher than 12 feet must also incorporate an intermediate landing area, taking up even more room.). Electrical: The 2017 National Electrical Code (NEC) became mandatory by state law effective September 15, 2017. The building code requirement for stair railings typically requires handrailings on stairs that have a total rise of three feet … It takes less material to construct OSHA stairs since IBC stairs require closed risers and no gaps larger than four inches between handrails and guards. Handrails and guardrails are mandatory, but gaps are allowed between rails since children will not be using these types of stairs. 2012 IBC Houston Amendments(adopted Feb. 1, 2016) 2. The stairway section of the code refers us to Section 1014 for handrail code requirements which you can read more about at the following link HERE. Welcome to the new and improved Building Code Forum. The tread and riser are referred to in all building codes. Regulatory agencies are the ones who make the distinctions between stairs for the commercial environment versus those for the industrial. Minimum width for stairways is determined by using a factor of 0.3 inch per occupant for non-sprinklered buildings or a factor of 0.2 inch per occupant for buildings equip with sprinklers and alarms, but shall at no point be less than 44 inches. In addition, these standards serve as a starting point for Rehabilitation of Single Family dwellings. They can include areas like factory floors and manufacturing spaces where only designated employees to work. Section 1011 of the International Building Code establishes the code requirements for stairs that serve an occupied building or space. That’s a lot of space used for a staircase! Whenever you see a set of stairs, you can be assured its construction was carefully considered. More information about accessible stairs along with a list of exceptions can be read in Section 1009.3.eval(ez_write_tag([[728,90],'buildingcodetrainer_com-large-leaderboard-2','ezslot_6',111,'0','0'])); Having proper headroom is another important code requirement. Commercial Stairs Built for the General Public The International Building Code (IBC) regulates any set of stairs used by the public, including any stairway that connects a building to a public space. Many businesses have private facilities. Stair riser heights and stair tread depths should be within the parameters of the code to avoid any potential trip hazards for inconsistencies. In every building four or more stories in height, one stairway shall extend to the roof surface, unless the roof has a slope greater than 4 in 12. Building Codes Questions Ray Boosinger Phone: 217-557-6140 Fax: 217-524-4208 Ray.Boosinger@illinois.gov Significant changes in the 2020 Minnesota Residential Code. The minimum width for stairways shall not be less than 36 inches clear. • If a stair has a minimum of four risers, a handrail is required. Like the IBC, OSHA dictates specific measurements. Note that when looking for residential stair standards, one must look at the International Residential Code (IRC). 4. According to the IBC, stairways with an occupant load of fewer than 50 people must be at least 36 inches wide. We outline the differences between industrial style stairs and commercial stairs, along with their related safety codes. Treads and risers shall not differ significantly in run and rise in successive f light s in any stair system. Again the tolerance between treads should be no more than ⅜ inch. Please contact Shannon Stevens at 972-564-7382 with questions. Building: 1.1. Inconsistencies or variations in risers or treads could interfere with the rhythm of the individual using the stairs. Regulation Reference: Risers & Tread – OSHA stair tread requirements 90 | IBC stair width 50 | OSHA stair maximum riser height 70 | OSHA stair riser height 70 Stair Width – OSHA stair tread requirements 90 Railings and Guardrails – OSHA handrail requirements 390 | IBC handrail 320 Balusters – OSHA 1910.29(b)(2)(iii). The Houston Amendments to the current adopted codes are listed below. These stair requirements are for stairs that serve an occupied building or space. Click the links below to download the PDF files. On the flip side, take ErectaStep’s stair system, which is fully compliant with OSHA’s codes. Stairways serving an occupant load of less than 50 shall not be less than 36 inches in width. The stair tread is the horizontal portion of the staircase on which people walk, the stair riser is the vertical portion of the staircase between each tread. The 2020 Minnesota State Building Code is effective March 31, 2020, except for the Minnesota Mechanical Fuel Gas Code, which is effective April 6, 2020. The BBCS also provides non-binding technical interpretation of the codes for professionals and the public. A uniform flight of stairs provides a safety factor. ErectaStep’s OSHA-compliant solutions require less space, cost less and are completely customizable. Several components are looked at such as stair width, headroom, riser and tread heights. var source = 'https://www.erectastep.com/wp-content/uploads/2017/07/interior-custom-configuration-' + expert_count + '.png'; 11″ tread, A minimum 44″ wide in most cases  (36″ wide areas served by less than 50 people). Each set has to meet certain standards before it’s made available for use. Stair nosing can refer to two things. Maximum 7 inch stair riser height and minimum 4 inch stair riser height. Code Compliant Commercial Stairs. So this basically sums up the basic code requirements for commercial stairs and their dimensions. It is important to know that these requirements are for stairs serving as a means of egress. Rise is the vertical height between any two adjacent steps and can be open (gap between the stairs) or closed ( a solid piece of material between stairs). The leading edge of the treads nosing must not project more than 1 1/4 inches beyond the tread below. Metal Stairs that save time, money and eliminate custom fabrication. First it refers to the fron… If it was calculated to be less, such as 40 inches for example, a width of 44 inches must be used since that is the minimum as noted above per Section 1011.eval(ez_write_tag([[300,250],'buildingcodetrainer_com-box-4','ezslot_3',109,'0','0'])); There are a few exceptions worth mentioning. Regulations do change. Nosing in commercial stairs must have curvature or a bevel of no less than 1/16 inch but not more than 9/16 inch when measured from the foremost projection of the tread. Stairs cannot be continuous without have a landing or floor level that breaks up the flight of stairs. Another key difference is cost. Building construction codes effective March 1, 2017 or as noted otherwise. Winder treads shall have a minimum tread depth of 10 inches (254 mm) measured as above at a point 12 inches (305) mm from the side where the treads are narrower. Copyright © 2020 Building Code Trainer, All rights reserved. This section explains how to size a portion of a mean of egress system. Here’s a side-by-side comparison. In order to access a 12-foot-high platform, an IBC stair would need 21 steps (7-inch rise, 11-inch tread), making the entire horizontal run of the stairs 19.25 feet. Width and Capacity (IBC 1011.2) The number of occupants on each floor will determine the required width of … By visiting our site, you agree to our privacy policy regarding cookies, tracking statistics, etc. In addition to this, a I stairway can be used as a component of a means of egress. View the 2015 Minnesota State Building Codes. With that said, let’s get into what those commercial stair requirements are…. Which properties must meet the building regulations of my home country for stairs and staircases? Copies of the 2018 International Code Council (ICC), can be found on the ICC website. The International Building Code (IBC) regulates any set of stairs used by the public, including any stairway that connects a building to a public space. The Bureau of Building Codes and Standards was created in 2010 under Title 25 §2372 to provide administrative and technical support to the Technical Building Codes and Standards Board. NYC Building Code 2008 > 10 Means of Egress > 1009 Stairways and Handrails > 1009.3 Stair Treads and Risers > 1009.3.1 Dimensional Uniformity Section 1009 Means of Egress, Stairways headroom shall be continuous above the stairway to the point where the line intersects the landing below, one tread depth beyond the bottom riser . Therefore, they are not bound by the IBC. OSHA-compliant stairs are designed to carry a load five times greater than the anticipated load, but never less than a load of 1,000 pounds. The code does also note that if a stairway is to be considered accessible, such as an accessible means of egress, it must have a clear width of 48 inches. There’s an exception to that. Assuming the minimum width of 36 inches, the floor space used by these stairs is 57.75 square feet. see section 1007.3 for accessible means of egress stairways. Exception 1 in Section 1005.3.1 allows for a reduction in size when a building is equipped with an automatic fire sprinkler system and an emergency voice/alarm communication system, except for when serving an occupancy group H and I-2. We can even customize individual measurements, like rise and tread, with our PerfectaStep solutions, giving you the perfect configuration for your job site. (2) Commercial: For this code, all buildings not included in the definition of “Residential” and not under the authority of the Alabama Building Commission. 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