Basic Fire Alarm Systems
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Basic Fire Alarm Systems

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Basic Fire Alarm Systems Basic Fire Alarm Systems Presentation Transcript

  • Basic Fire Alarm Systems I Introduction to Office Buildings (B or S-1 Occupancy) Fire Sprinkler Alarm Monitoring Systems
  • Sample B Occupancy Building
  • Basic Waterflow Systems
    • What is to be monitored?
    • Fire sprinkler riser with flow switch and tamper and/or PIV?
    • A main office or lobby?
    • Duct smoke detectors?
    • What is required?
    • Basic connections to each of these devices must be provided.
    • A horn strobe, manual pull station and an annunciator/keypad.
    • Any HVAC unit exceeding 2000cfm requires a duct smoke detector and a connection to it.
  • Special Circumstances
    • Be sure to look at the mechanical plans of a B occupancy (office building). Check and see if it has a 1-Hour rated corridor. It is usually labeled as such. However when this occurs, fire/smoke dampers (FSD) will more than likely will be present. These may require additional smoke detectors (if there are no duct detectors), relay modules and a few extra connections.
    • If an office is two or more floors, it will certainly have an elevator/s. Each elevator will require relays, a smoke detector per lobby, a smoke and heat detector in the equipment room as well as the top of the shaft (unless a retrofit).
    • Any building that is three floors or more may be subject to additional requirements such as smoke control, atriums and additional notification.
    • Also, some AHJ’s and insurance companies require more than what is required by code. Insurance companies are usually the parties who require extra devices.
  • High-Rise Buildings
    • Any building that has seven floors or is over 75 ft. in height is considered a high-rise. These building have their own set of requirements.
    • Full voice evacuation is they key in this situation. Though strobes are okay to use, horn strobes are now replaced by speaker strobes.
    • All common areas (open office areas, corridors, conference rooms, restrooms, break rooms and lobbies) are to receive full smoke detection and notification devices.
    • At each stairwell and elevator lobby on every floor, there is to be a manual pull station and a firefighters phone. If the pull stations are more than 150 ft. apart, and additional pull will be required so that the travel distance is less than 150 ft.
    • If a high-rise has subterranean parking levels, they are subject to full voice notification also.
    • High-rises are very particular and should be carefully bid between the salesperson, operations and engineering.
  • In Review
    • B and S-1 occupancies are usually very simple systems that can quickly become quite complicated.
    • Mechanical drawings are an exceptionally important part of any bid.
    • Know if the customer has any plan of expanding, this may cost them a little more upfront, but eliminates a lot of hassle down the road.
    • Elevators usually require automatic recall from the fire alarm system. Those functions are primary and secondary floor recall and shunt trip.