1010.1.4.4 Security grilles.
BC § 1010.1.4.4
In Groups B, M and S, horizontal sliding or vertical security grilles are permitted at the main entrance where the opening of such grilles are essential to the operation of the establishments. Such grilles shall be installed in accordance with the following criteria: 1. Security grilles shall be openable from the inside without the use of a key or special knowledge or effort during periods that the space is occupied.
2.The security grilles shall remain secured in the full-open position during the period of occupancy by the general public.
3.Except as to buildings or structures classified in occupancy Group S, buildings or structures that have been designated as a landmark by the landmarks preservation commission or located in a historic district designated by such commission, on or after July 1, 2011, no security grille may be installed or replaced, nor shall the owner of a structure classified as a Group B or M occupancy or the operator of the business occupying such structure allow to be installed or replaced, a security grille to secure such property where the grille abuts the sidewalk, unless the grille, when closed, permits visibility from the sidewalk of at least 70 percent of the area covered by such grille.
4.No later than July 1, 2026, all security grilles installed on buildings or structures classified in occupancy Groups B or M shall comply with the provisions of Item 3 of this section.
5.Where two or more means of egress are required, not more than one-half of the exits or exit access doorways shall be equipped with horizontal sliding or vertical security grilles.
