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You’ve read several articles about fire alarm systems but never paid much attention to them. So here we’ll look at NFPA 72, positive alarm sequence, smoke detection, and Audible signal. Once you understand these basics better, you’ll be ready to implement fire safety measures in your building.
NFPA 72
The NFPA 72 guide to local fire alarm basic requires that the fire alarm system give audible and visible signals to alert occupants to evacuate. The fire alarm system must comply with NFPA 72 for audible alarms, ICC/ANSI A117.1 for visual signals, and the authority’s jurisdiction for accessibility. The code also specifies certain situations where the fire alarm system should not be used.
The NFPA 72 guide to local fire alarm systems also covers smoke and heat alarms, which are required in all occupancies. Smoke alarms must meet certain NFPA 72 requirements, and you can find this information at your local building department or code office. Since codes vary from state to state, you need to know which applies to your property. Generally, communities adopt the International Code Council (ICC) building code containing smoke and heat alarm requirements. If you’re unsure about the conditions in your area, contact the local fire department.
Positive Alarm Sequence
A positive alarm sequence is a function of a local fire alarm system that automatically initiates an evacuation signal in response to a fire alarm. This feature is permitted under NFPA 101, which requires the approval of the fire code official and the local fire department. This feature allows positive alarm sequences to be used in all occupancy classes. However, the facility must be adequately equipped with fixed fire protection.
If a positive alarm sequence is used, a building fire evacuation signal is not triggered until three minutes after the initial trigger of the alarm. This delay allows people to exit the building without blocking fire doors. In some cases, this feature can even eliminate the need for fire-rated classroom doors or hold-open devices on fire-rated doors. Positive alarm sequences are permitted in Colorado Springs, but a building’s fire code requirements must be met before a positive alarm sequence can be implemented.
Detecting Smoke
Investing in a smoke alarm is essential if you want peace of mind. Many models can be hard-wired into your home’s electrical system and require no external power. Others rely on a backup battery that lasts ten years or longer. Regardless of how they’re powered, a smoke alarm should be checked monthly and replaced as needed. In addition, using an alarm with a backup battery can save you the expense of hiring an electrician.
There are two basic types of smoke detectors. The first type is the traditional linear type, which detects smoke over a wide area and sends the signal to a central control panel. These devices are most common in large commercial buildings, where a single detector covers a larger size, and fewer total devices are required. Each device in a fire alarm system has a different role in triggering an alarm and has its requirements.
Audible Signal
An audible signal is an excellent way to alert building occupants of a fire. It should give clear instructions on evacuation or relocating and can be broadcast via an existing public address system. However, it is not required that the entire building be notified. According to NFPA 101, occupants with a “need to know” should be informed. Audible signal devices must be designed to withstand any triggering situation.
Audible signal appliances are also available. They are often used to alert people with hearing impairments and those with difficulty hearing. For example, strobe lights can show an EMERGENCY. In addition, electronic signage, which displays warning messages and information, can be an effective means of notification.
Voice Evacuation
A building should have an adequate fire alarm system as part of an overall fire safety plan. A fire alarm is a device that sounds an audible tone that is designed to be heard in all situations. Visual alarms should follow NFPA 101 standards for flash rate and pulse duration. NFPA 101 also outlines when they should not be used. There are many different types of fire alarms. Fortunately, NFPA 101 also outlines the benefits of each kind of alarm.
First and foremost, fire alarms are critical safety equipment for homes and businesses. This equipment is not something that can be cut in half or neglected. It must be continually evaluated because regulations and risks change. Without fire alarms, there is no way to protect people, property, and the building from severe injuries and death. That’s why fire alarms are the first line of defense. Detecting fires early is critical because it allows time to get out of a building.
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