410.3.5 Proscenium curtain.
BC § 410.3.5
Where a proscenium wall is required to have a fire-resistance rating, the stage opening shall be provided with one of the following: 1. A fire curtain complying with NFPA 80; or 2. An approved stage water curtain and sprinklers complying with Section 410.7 and Section 903.3.1.1 of this code, and the following: 2.1. A deluge valve actuated by a "rate of rise system" and "fixed temperature system" shall control the water curtain system; 2.2. The heat actuating devices shall be located on not more than 10-foot (3048 mm) centers around the perimeter of the sprinklered area stage or as otherwise required for the type of device used to assure operation of the system; 2.3. In addition to the automatic controls, manual-operating devices shall be located at the voice/alarm communication system required by Section 410.9, and adjacent to at least one exit from the stage. Such exit shall be remote from the voice/alarm communication system; 2.4. All valves controlling deluge and sprinkler supplies on stages where the stage height is greater than 40 feet (12 192 mm) shall be provided with tamper switches wired to an annunciator panel located at the voice/alarm communication system required by Section 410.9; 2.5. The operation of any section of the sprinkler system on stages where the stage height is greater than 40 feet (12 192 mm) or the operation of the deluge system shall activate the emergency ventilating equipment required in Section 410.3.7 and shall be provided with central station supervision in addition to the required local alarm; and 2.6. The water flow alarm, tamper switches, the sprinkler system on stages where the stage height is greater than 40 feet (12 192 mm), and deluge system equipment shall be provided with central station supervision in addition to the required local alarm. (Am. L.L. 2023/077, 6/11/2023, eff. 6/11/2023) Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2023/077.
