| See | 10 44 00 for fire protection specialties. 27 15 01 for fire alarm communications conductors and cables. 27 51 29 for emergency communications systems for two-way radio communications enhancement systems, such as bi-directional amplifiers, and stairway and area of rescue assistance systems. 27 51 29.13 for rescue assistance signal systems. 27 51 29.17 for two-way radio communications enhancement systems. 28 32 00 for radiation detection and alarm. 28 33 00 for gas detection and alarm. 28 35 00 for refrigerant detection and alarm. 28 41 00 for radiation detection and alarm. 28 42 00 for gas detection and alarm. 28 43 00 for fuel-oil detection and alarm. 28 44 00 for refrigerant detection and alarm. 28 47 00 for mass notification. Division 21 for fire suppression systems. |