door holders by the 72/ 2010 edtion::
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**************** 21.8.2 All detection devices used for door hold-open release service shall be monitored for integrity in accordance with Section 10.17.
Exception: Smoke detectors used only for door release and not for open area protection.****************************
17.7.5.6 Smoke Detectors for Door Release Service.
17.7.5.6.1 Smoke detectors that are part of an open area protection system covering the room, corridor, or enclosed space on each side of the smoke door and that are located and spaced as required by 17.7.3 shall be permitted to accomplish smoke door release service.
17.7.5.6.2 Smoke detectors that are used exclusively for smoke door release service shall be located and spaced as required by 17.7.5.6.
17.7.5.6.3 Where smoke door release is accomplished directly from the smoke detector(s), the detector(s) shall be listed for releasing service.
17.7.5.6.4 Smoke detectors shall be of the photoelectric, ionization, or other approved type.
17.7.5.6.5 The number of detectors required shall be determined in accordance with 17.7.5.6.5.1 through 17.7.5.6.5.4.
17.7.5.6.5.1 If doors are to be closed in response to smoke flowing in either direction, the requirements of 17.7.5.6.5.1(A) through 17.7.5.6.5.1(D) shall apply.
(A) If the depth of wall section above the door is 24 in. (610 mm) or less, one ceiling-mounted smoke detector shall be required on one side of the doorway only, or two wall-mounted detectors shall be required, one on each side of the doorway. Figure 17.7.5.6.5.1(A), part A or B, shall apply.
Detector Location Requirements for Wall Sections.
(B) If the depth of wall section above the door is greater than 24 in. (610 mm) on one side only, one ceiling-mounted smoke detector shall be required on the higher side of the doorway only, or one wall-mounted detector shall be required on both sides of the doorway. Figure 17.7.5.6.5.1(A), part D, shall apply.
©* If the depth of wall section above the door is greater than 24 in. (610 mm) on both sides, two ceiling-mounted or wall-mounted detectors shall be required, one on each side of the doorway. Figure 17.7.5.6.5.1(A), part F, shall apply.
(D) If a detector is specifically listed for door frame mounting, or if a listed combination or integral detector–door closer assembly is used, only one detector shall be required if installed in the manner recommended by the manufacturer's published instructions. Figure 17.7.5.6.5.1(A), parts A, C, and E, shall apply.
17.7.5.6.5.2 If door release is intended to prevent smoke transmission from one space to another in one direction only, detectors located in the space to which smoke is to be confined, regardless of the depth of wall section above the door, shall be in accordance with 17.7.5.6.6. Alternatively, a smoke detector conforming with 17.7.5.6.5.1(D) shall be permitted to be used.
17.7.5.6.5.3 If there are multiple doorways, additional ceiling-mounted detectors shall be required as specified in 17.7.5.6.5.3(A) through 17.7.5.6.5.3©.
(A) If the separation between doorways exceeds 24 in. (610 mm), each doorway shall be treated separately. Figure 17.7.5.6.5.3(A), part E, shall apply.
Detector Location Requirements for Single and Double Doors.
(B) Each group of three or more doorway openings shall be treated separately. Figure 17.7.5.6.5.3(B) shall apply.
Detector Location Requirements for Group Doorways.
© Each group of doorway openings that exceeds 20 ft (6.1 m) in width, measured at its overall extremes, shall be treated separately. Figure 17.7.5.6.5.3© shall apply.
Detector Location Requirements for Group Doorways over 20 ft (6.1 m) in Width.
17.7.5.6.5.4 If there are multiple doorways and listed door frame–mounted detectors, or if listed combination or integral detector–door closer assemblies are used, there shall be one detector for each single or double doorway.
17.7.5.6.6 The locations of detectors shall be determined in accordance with 17.7.5.6.6.1 and 17.7.5.6.6.2.
17.7.5.6.6.1 If ceiling-mounted smoke detectors are to be installed on a smooth ceiling for a single or double doorway, they shall be located as follows (Figure 17.7.5.6.5.3(A) shall apply):
(1)
On the centerline of the doorway
(2)
No more than 5 ft (1.5 m), measured along the ceiling and perpendicular to the doorway (Figure 17.7.5.6.5.1(A) shall apply.)
(3)
No closer than shown in Figure 17.7.5.6.5.1(A), parts B, D, and F
17.7.5.6.6.2 If ceiling-mounted detectors are to be installed in conditions other than those outlined in 17.7.5.6.6.1, an engineering evaluation shall be made.
ONE MORE:
Chapter 21 Emergency Control Functions and Interfaces
21.1 Application.The provisions of Chapter 21 shall cover the minimum requirements for the interconnection of emergency control functions to the fire alarm system and emergency communications systems in accordance with and 21.2.1 through 21.2.3 and 23.8.1.1
21.1.1 The requirements of Chapters 10, 17, 18, 23, 24 and 26 shall also apply, unless they are in conflict with this chapter.
21.1.2 The requirements of Chapter 14 shall apply.
21.1.3 The requirements of this chapter shall not apply to Chapter 29 unless otherwise noted.
Chapter 21 Emergency Control Functions and Interfaces
21.8 Door Release Service.
21.8.1 The provisions of Section 21.8 shall apply to the methods of connection of door hold-open release devices and to integral door hold-open release, closer, and smoke detection devices.
21.8.2 All detection devices used for door hold-open release service shall be monitored for integrity in accordance with Section 10.17.
Exception: Smoke detectors used only for door release and not for open area protection.
21.8.3 All door hold-open release and integral door release and closure devices used for release service shall be monitored for integrity in accordance with Section 21.2.
21.8.4 Magnetic door holders that allow doors to close upon loss of operating power shall not be required to have a secondary power source.
