A new provision has been added to the tread and riser requirements to restrict open stair risers. Stair stringers may project into the required width not more than two inches on each side of the stair.
Current Ontario Building Code Requirements The Ontario Building Code distinguishes three types of stair treads shown in Figure 1.
Ontario building code interior stair railing requirements. Rectangular treads angled treads found in curved stairs and wi nders that are special angle d treads. I was checking out the 2006 OBC Ontario Building Code. Handrail height from the nose of the stair to the top of the rail minimum 35 Note that this was raised from 31 in 2008 so stair rails today are higher than those in pre 2008 homes OBC 98742 Guard rail height minimum 36.
If youre planning to put guardrails on each side then the width must be at least 27 below the guardrail top height. The building code requirement for stair railings typically requires handrailings on stairs that have a total rise of three feet or more. Guards IBC 101113 1015 Guards are required along all open-sided walking surfaces of the stairway including landings and stairs.
1 A stairway shall have a handrail on at least one side and if 1 100 mm or more in width shall have handrail s on both sides. Stairs 2200mm 87 inches require an intermediate handrail such that a user is no more than 825mm 32 inches from a handrail. The width of the stairway on top of the handrail and under the minimum headroom height must not be less than 36.
The Ontario Building Code Handrails. The amendment also reduces the maximum rise for stairs from 200 mm to 180 mm. This Article was amended to increase the minimum run for stairs from 255 mm to 280 mm.
A single handrail is sufficient for stairways less than 110 cm 435 in wide. No interior stair shall be reduced in width in the direction of exit travel. Stairways that have over four risers or are higher than 30 inches must have railings installed on each side unless one of them is a wall.
2 Where a stair or a ramp is required to be at least 2 200 mm wide due to the occupant load a handrail shall be installed such that no position on the stair or ramp is more than 825 mm from a handrail. If guardrails are required to make a stair landing safe the handrails can have a maximum height of 107 cm 42 in. The guard height must be at least 42 inches high and it is measured vertically from the leading edges of the tread nosings or from the landing surface.
A concentrated load of 200lb is allowed on the construction. The National Building Code sets the height of a handrail between 865 cm 34 in and 965 cm 38 in. You can go a bit higher than this if you prefer for added peace of mind.
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. Code requires guardrail in residential structures be a minimum of. Guardrail refers to the structural railing element that sits atop a railing system.
Handrails on sides of stairs can be between 2-7 and 3-2 measured vertically from the line of flight. If your stair is 3-7 in width or greater you need two rails one on each wall or one on the wall opposite your open railing. Where a stair or a ramp is required to be at least 2 200 mm wide due to the occupant load a handrail shall be installed such that no position on the stair or ramp is more than 825 mm 32 from a handrail.
A guardrail is typically required for stairs with 4-or-more risers or for a deck or balcony with 30 inches above grade. B A stair railing shall be of construction similar to a guardrail see Section 3209 but the vertical height shall be in compliance with Section 3214 c. 2 If the required width of a ramp or f light of stairs is more than 2 200 mm one or more intermediate handrail s continuous between landings shall be provided and located so.
Does my stairway need two bannisters. 3 A handrail is not required for stairs and ramps serving a single dwelling unit where. The interior stairway railing height code in Toronto dictates that the optimum railing height is between 34 and 38 inches.
Stair railings on open sides that are 30 inches or more above the surface below shall be equipped with midrails approximately one half way between the steps and the top rail. The Ontario height code as well as other requirements are based on the special features of the areas climate as well as the building experiences. OBC 98832 The space between balusters must be less than 4.
The design requirements for. Any spacing in the guards must be less than 4 inches. Handrail Height A handrail must be between 865mm and 1070mm 34 and 42 inches above the nosing.
Under the handrail the width must be at least 315 if theres one guardrail. The width of interior stairs shall be the clear width between walls grilles guards or newel posts. Minimum stair railing height has to be 34 from the top rail to the nosing.
A 50lb load is allowed per square feet for every baluster.