Stairs, Guards, and Handrails
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Changes and updates in this section come into effect on January 1, 2022, except for changes made to Article 220.127.116.11., which came into effect on January 1, 2020..
Definitions, Division A, Article 18.104.22.168.
Three new defined terms relating to stairs and ramps have been added to provide clarity. These new terms are “flight”, “tapered tread”, and “run”, and can be found in Part 1 in Division A.
Article 22.214.171.124. - Tapered Treads in a Curved Flight
This Article was revised to introduce consistent terminology and states the appropriate way of constructing tapered treads in curved flights of stairs.
Article 126.96.36.199A. - Handrails in Aisles with Steps
A new Article has been added for the installation of handrails in aisles with steps in assembly occupancies.
Article 188.8.131.52. - Repair and Storage Garages
This Article was amended to clarify requirements for vehicle guardrails in storage garages.
Article 184.108.40.206. - Guards
This new Article has been added to address the size of openings through guards in industrial occupancies.
Article 220.127.116.11. - Dimensions of Landings
A new requirement has been added to harmonize the dimensions of landings with similar requirements in Part 9.
Article 18.104.22.168. - Handrails
Changes have been made to handrail requirements to clarify where handrails are required and where they need to be continuous.
There are additional changes to address the clearance and height of handrails.
The loading requirements for handrails have been moved from Part 3 to Part 4.
Article 22.214.171.124. – Guards
A new requirement has been added to harmonize the height of guards serving exit stairs with similar requirements in Part 9.
Article 126.96.36.199. - Treads and Risers
This Article was amended to increase the minimum run for stairs from 255 mm to 280 mm.
The amendment also reduces the maximum rise for stairs from 200 mm to 180 mm.
A new provision has been added to the tread and riser requirements to restrict open stair risers.
Article 188.8.131.52. - Curved Flights in Exits
This Article was revised to clarify the permitted stair configurations for Part 3 building exit stairs.
Article 184.108.40.206. - Loads on Guards and Handrails
Changes have been made to the load requirements on guards and handrails.
Load requirements for handrails have been moved from Part 3 to Part 4.
Article 220.127.116.11. - Loads on Vehicular Guardrails
The requirements for vehicle guardrail design have clarified that guard loads for vehicles and persons do not need to be considered at the same time.
Article 18.104.22.168. - Loads on Walls Acting as Guards
Load requirements for walls acting as guards have been modified to clarify that lateral loads act in the outward direction.
Article 22.214.171.124. - Straight and Curved Runs
This Article has been amended to introduce new stair configurations.
Article 126.96.36.199. - Dimensions for Runs and Rectangular Treads
This Article has been amended to increase the minimum stair run for stairs inside dwelling units.
Article 188.8.131.52. - Dimensions for Tapered Treads
This Article has been amended to clarify the dimensions and method of measurement for tapered treads.
Article 184.108.40.206A. - Uniformity of Runs in Flights with Mixed Treads within a House or Dwelling Unit
A new Article has been added to clarify the requirements for a uniform run where flights include both tapered and rectangular treads.
Article 220.127.116.11A. - Spiral Stairs
A new Article has been added to allow the use of spiral stairs in dwelling units in Part 9 buildings under certain conditions.
Article 18.104.22.168. - Ramp Width
This Article has been amended to eliminate the references to “exit ramps and public ramps”.
Article 22.214.171.124. - Dimensions of Landings
This Article has been amended to modify the required length of stair landings.
Article 126.96.36.199. - Required Handrails
A new Sentence has been added to require that handrails be installed on the narrow end of the treads in a house or an individual dwelling unit where the flights of stairs consist of tapered treads or a mix of tapered treads and rectangular treads.
Article 188.8.131.52. - Continuity of Handrails
This Article has been amended to clarify continuous handrail requirements.
Article 184.108.40.206. - Height of Handrails
This Article has been amended to increase the maximum handrail height from 965 mm to 1070 mm.
Article 220.127.116.11. - Ergonomic Design
This Article has been amended to add a clearance distance between the handrail and a rough or abrasive surface of 60 mm.
Article 18.104.22.168. - Required Guards
This Article has been amended to remove the specific guard requirements for certain small interior stairs and ramps.
Article 22.214.171.124. - Load on Guards
Table 126.96.36.199. was changed to provide consistency for the minimum surface area on which the concentrated load on guard elements serving public stairs would apply, and resolves the difference between Part 4 and Part 9.
Article 188.8.131.52. - Height of Guards
This Article was amended to exclude spiral stairs from the guard height requirements.
Additionally, the specific requirements for guard heights for exit stairs and landings have been removed.
Article 184.108.40.206. - Guards for Floors and Ramps in Garages
This Article was amended to reduce the minimum curb height from 150 mm to 140 mm.
Article 220.127.116.11. - Openings in Guards
This Article was amended to relax the opening requirements for guards located in industrial occupancies other than storage garages.
This Article was also amended to clarify requirements for the size of openings.