The accepted minimum riser height for a patio step is 4 inches and not higher than 7 inches. OUTDOOR STEP HEIGHT. A handrail must be between 865mm and 1070mm (34 and 42 inches) above the nosing. (See Note A-3.4.3.4.) If the bottom or top step is noticeably different in height or length from the other stairs, it will be a tripping hazard. A deck’s stairway should be carefully planned so that all the stair rises (the vertical height of the steps) and all the tread depths (the horizontal length of the step runs) are equal. Interior guard rails are to be 32" - 38" in height (830-1040mm) for single residential dwellings. × USA RAIL HEIGHT FOR RESIDENCES. Thirty-six inches is the most common residential height, but some jurisdictions vary. Decking. One of the best ways to ensure the safety of your deck is by installing a handrail. (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. Additionally, the stair railing height should measure at least 34” from the nosing to the top rail. 2)Except as provided in Sentence (3), the clear height over stairs shall not be less than 2 050 mm. The recommended range for riser height, in an outdoor set of steps, is a minimum of 4.5 inches to a maximum of 7 inches. International Building Code for Stair treads and risers 1009.3 Stair treads and risers. • Handrail height must be 34 to 38 inches high, measured from the tread nosing or ramp surface, with two exceptions allowed: 1) a volute (shown below) is allowed over the lowest tread, and 2) the transition from handrail to guard, or at the start of a stair flight, my exceed 38 inches. One specific requirement is that the space between the surface and the bottom rail should not be more than 4”. The purpose of stair requirements within the Code is to provide for the safe passage of the users of the stairs. If it does not, then you’ll need a separate handrail attached to your deck stair guardrail, between 34” and 38” in height. The tread of the stairs (or the part of the stair where you place your foot) must be at least 11 inches. Learn more about the basics of deck railing code-compliance and installation in the Deck Railing Guide and Glossary of Deck Terms and Lingo . Handrails, Guards and Stairs . The most important dimensions are the riser height and tread depth. The tread depth can then be obtained by using the above formula. If a ledger board isn't present, install one and measure from the front of the board. STAIR WIDTH Over the years, many designers and safety codes officers have had disagreements as to how the width of a flight of stairs is to be measured. The top edge of the handrail must be placed between 34” and 38” above the nosing of the stair treads. You can find some more information here as well on other stair-related dimensions. NOTE: NCC 2015 was adopted by the States and Territories on 1 May 2015. CITY OF NANAIMO HARBOUR CITY … The riser height shall be measured vertically between the leading edges of adjacent treads. The Ontario Building Code | Stairs 3.4.7.5. (Title 24, Part 2, Section 3305(c).) Handrail Height. When planning the look of your concrete stairway, don't sacrifice functionality for flair. HEIGHT DIAGRAMS: US and Canada. Height over Stairs 1)The clear height over stairs shall be measured vertically, over the clear width of the stair, from a straight line tangent to the tread and landing nosings to the lowest point above. Accessibility • 3.8.3.1. For outdoor steps, the common formula for comfortable proportioning is 2(R) + T = 26” to 27”, where R = riser height (in inches) and T = tread depth (in inches). How do you think about the answers? They should be in proportions that will comfortably accommodate the average person's stride. Building Materials. The run should be between 210 mm (8 ¼”) and 355mm (14”). Sign in. Deck stair handrails height should be at least 34 vertical inches from stair tread nosing to the top of the stair handrail. The measurements of a stair, in particular the rise (height) and run (depth) of the steps, should remain consistent throughout the stairs. 1℃ and an outdoor air temperature of -18℃ +/- 1 ... • Height of guards serving flight of exit stairs in Part 3 / 9 is harmonized (previously 920mm and 1070 mm) to all be 1070 mm • No open riser stairs permied in public stairs, only permied within dwelling units and industrial occupancies. The following stair measurements are important: The rise of each step is measured from the top of one tread to the top of the next tread. Source(s): building steps height code: https://tr.im/BP0bN. Get Started! Building Code. In a given run of stairs, the greatest step height and the smallest step height should not vary more than 3/8 inch (9.5 mm). The depth of the tread must be at least 11 inches. Risers - the Step Height [F] is the typical height of each step. It is not the physical height of the riser; the latter excludes the thickness of the tread. Exceptions Certain types of stairs have special requirements. A 36 ”rail measured from the top of rail to the deck surface is required. Handrails are required for stairs and must meet standards as specified by R311.5.6.3 in the IRC code. The rise of the stairs should be between 125 mm (5”) and 200 mm (8”). Use these measurements to determine the length of the stringers (supports) and the distance from the house to the base of the stringers. They should be installed on: for Single Family Dwelling Units . You can sign in to vote the answer. Stair tread depths shall be 11 inches (279 mm) minimum. Handrail ends must be returned and terminated at rail posts. example: (2 x … The height of your front entry step (called Risers), according to code, can be no higher than 7 3/4 inches . Multi-family dwellings and commercial require 42" across the board. Before you finalize the design and get your toolkit ready, you should first be thorough with Ontario building code for railing height. 5-1/2” & 35-1/2” 35-1/2”” 35-1/2”” 6’ 4-3/4” 42” 15” LOCATED AT 4.2 M ABOVE THE ADJACENT LEVEL 9.8.8.6 . Outdoor Stairs. Aluminum (12) Composite (2) Plastic (1) Rubber (1) Wood (3) Assembled Depth (in inches) 0.5 in to 1 in (1) 7 in to 10 in (3) 10 in to 15 in (8) 24 in to 30 in (1) 36 in to 42 in (4) 42 in to 48 in (4) 48 in to 60 in (4) Brand Name. To calculate if the steps will be within the Building Codes specs : 2 times the step riser height + 1 tread width equals between 24 and 25 in inches (60.96cm and 63.5cm). Most building codes require handrails for exterior stairs to be between 34 inches and 38 inches above the stair nosings. RISERS. In the U.S., the I-Codes require handrail placed between 34 and 38 inches. Stairs ≥ 2200mm (87 inches) require an intermediate handrail such that a user is no more than 825mm (32 inches) from a handrail. However, wider stairs are typically more inviting and can feel safer for users, particularly in crowded public spaces. Zip Code Project. 34 "minimum stair rail height from nosing to top of rail; MORE BUILDING code topics . Typical Detail for Stairs, Guard, & Handrails . The minimum height of the railing varies based on the height of the deck. Stair riser heights shall be 7 inches (178 mm) maximum and 4 inches (102 mm) minimum. The overall width of a set of outdoor stairs should be a minimum of 4 feet in a private setting, and 5 feet in a public space. For handrails in Canada, the height should be 32-36 inches above the stairs. Entry Step Risers & Treads. Guards are required when then deck is 24" (60 cm) above grade. The current edition is NCC 2019, adopted by the jurisdictions July 1, 2020. The handgrips must allow a minimum of 1-1/2” space between the handrail and the guardrail or wall. Code states that this should not be greater than 7 3/4 inches (194 mm). The part of the front entry step you actually step on (called Treads) can be no less than 10 inches. The BC Building and Plumbing Code, which set the technical requirements for building construction throughout B.C. Consult your local building codes to get all the details and formulas you’ll need to make sure your stairs are up to code. Pro Tip. Unit run is measured from face of nosing to face of nosing. This means that a handrail's height is measured from the top of the stair treads, or horizontal stepping members. The NCC is updated and amended regularly. The greatest riser height within any flight of stairs shall not exceed the smallest by more than 3/8 inch. This deck railing height code also applies to commercial decks and balconies such as restaurants, bars, and museums as well as multi-family homes, condos, and any deck on a third-story or higher. … Steps and stairs must now comply with the Building Code of Australia - which has been given the status of building regulation by Australia's states and territories. Canada REsidential Rail Height and Dimensions. The BC Building code requires ALL guard rails to be 42" in height for exterior if the height above ground is greater than 600 mm. Make sure the planned stairs are all the same height and depth, and that the stair height and width conform to local building codes. (d) Surface. Outdoor Stair Treads (25 products) Category. Decks 24" to 5-10" (180 cm) need 36" guards and anything above 5-10" requires a 42" high railing. 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