AEC-AI

What is the requirement for audibility of alarm system?

Alarm signals

Alert signals

Alarm signals are clearly audible throughout the floor area and throughout any occupancy on a roof.	Alert signals are clearly audible in continuously staffed locations, and where there are no continuously staffed locations, throughout the floor area and throughout any occupancy on a roof.
The sound pattern of an alarm signal shall conform to the temporal pattern defined in Clause 4.2 of ISO 8201	The sound patterns of alert signals shall be significantly different from the temporal patterns of alarm signals.

1. The fire alarm signal sound pressure level shall be not more than 110 dBA in any normally occupied area.
2. The sound pressure level in a sleeping room from a fire alarm audible signal device shall be not less than 75 dBA in a building of residential or care occupancy when any intervening doors between the device and the sleeping room are closed.
3. the sound pressure level from a fire alarm system’s audible signal device within a floor area shall be not less than 10 dBA above the ambient noise level without being less than 65 dBA.
4. Audible signal devices within a dwelling unit or a suite of residential or care occupancy shall be connected to the fire alarm system
a) in a manner such that a single open circuit at one device will not impair the operation of other audible signal devices on that same circuit that serve the other dwelling units or suites of residential or care occupancy, or
b) on separate signal circuits that are not connected to the devices in any other dwelling unit, public corridor or suite of residential or care occupancy. 5. In a building or part thereof classified as a residential or care occupancy,
a) separate circuits shall be provided for audible signal devices on each floor area, and
b) audible signal devices within dwelling units or suites of residential or care occupancy shall be wired on separate signal circuits from those not within dwelling units or suites of residential or care occupancy.
6. Audible signal devices shall be installed in a service space referred to in Sentence 3.2.1.1.(8) and shall be connected to the fire alarm system.

THE ABOVE CODE ANALYSIS IS AS PER BC BUILDING CODE 2018. PLEASE REFER TO OTHER PROVINCIAL AND MUNICIPAL CODES AND BY-LAWS FOR SPECIFIC REGIONAL REQUIREMENTS.

DISCLAIMER: THIS CODE ANALYSIS IS PROVIDED FOR REFERENCE PURPOSES ONLY. UNDER NO CIRCUMSTANCES SHALL ZIYUTEC INC. OR ITS AFFILIATES, PARTNERS, SUPPLIERS, OR LICENSORS BE LIABLE FOR ANY INDIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL, OR EXEMPLARY DAMAGES ARISING OUT OF OR IN CONNECTION WITH YOUR ACCESS OR USE OF OR INABILITY TO ACCESS OR USE THE SYSTEM.

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