National Building Code of Canada - Section 116

Division B 2.2.7.2. 2.2.6.9. Floor Openings 1) Except as provided in Article 2.2.6.10., floor openings shall be provided with a cover at floor level that is capable of resisting the loads specified in Section 2.3. for the adjacent area of floor. 2) Openings through the cover required by Sentence (1) shall be of a size that prevents the passage of a spherical object whose diameter is more than 100 mm. 2.2.6.10. Guards 1) Except as provided in Sentence (3), a guard not less than 1 070 mm high shall be provided a) around floor openings, where provision of a cover in accordance with Sentence 2.2.6.9.(1) is not practical, and b) at locations where the difference in elevation between two adjacent surfaces is more than 600 mm. 2) The guard required by Sentence (1) shall consist of a) a top railing, b) an intermediate rail located at the mid-height of the guard ,and c) where tools or other objects could fall from an upper floor surface onto a person on an adjacent lower surface, a toe board extending not less than 125 mm above the upper floor surface. 3) Sentence (1) does not apply a) to vehicle repair pits, b) to loading docks, or c) where access is provided for maintenance purposes only. 2.2.6.11. Signage 1) Warning signs shall be installed in accordance with Subsection 2.14.2. of Division B of the NFC. 2.2.6.12. Transparent Doors and Panels 1) A glass or transparent door shall be designed and constructed so that the existence and position of the door is readily apparent, by attaching visually contrasting hardware, bars or other permanent fixtures to it. 2) Transparent doors and panels shall conform to Sentences 3.3.1.20.(2), (3) and (6). 3) Transparent panels used in a door that provides access to exit that, because of their physical configuration or design, could be mistaken as a means of e gress shall be made inaccessible by barriers or railings. 2.2.7. Exits 2.2.7.1. Exit Facilities 1) Exit facilities complying with this Subsection shall be provided from every floor area containing a Group G, Division 1, 2 or 3 major occupancy . (See Note A-2.2.7.1.(1).) 2.2.7.2. Types of Exits (See Note A-2.2.7.2.) 1) An exit from any floor area shallbeoneofthefollowing: a) an exterior doorway conforming to Sentences 2.2.7.6.(1) and (2) and Articles 2.2.7.7., 2.2.7.8. and 3.4.6.11., b) an openable window or panel conforming to Sentence 2.2.7.6.(5), or c) an exit facility listed in Article 3.4.1.4. that conforms to Articles 3.4.1.5., 3.4.1.6. and 3.4.6.10., Sentence 3.4.2.2.(1) and Subsection 3.4.4. National Building Code of Canada 2025 Volume 1 Division B 2-11