New FSE wiki article: Manual call point (written by Kimi Code CLI) |
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A ''' | A '''manual call point''' is a device that allows a person to initiate a fire alarm after recognising a possible fire. Its operation relies on human action rather than an automatic sensing element. Predicting the time to alarm therefore requires consideration of how the fire is noticed and when someone acts.<ref name="CVM_28_29">Ministry of Business, Innovation and Employment (2025), pp. 28–29.</ref> | ||
Manual initiation can form part of a wider detection and warning arrangement, and it provides an input to the alarm system, which must then communicate the intended warning or protective command. Other occupants may still need time to understand the warning and prepare to leave. The person operating the device and the people receiving the alarm perform different roles.<ref name="SMC_4-3">Schifiliti, Meacham, and Custer (2002), p. 4-3.</ref><ref name="P_3-350_3-351">Proulx (2002), pp. 3-350–3-351.</ref> | |||
Engineering methods may restrict the circumstances in which manual activation can replace an automatic detection assumption. New Zealand's C/VM2 (2025), for example, sets conditions for high-ceiling spaces with limited numbers of awake, familiar occupants. Its treatment of enclosed offices also depends on room size, floor level and the escape route.<ref name="CVM_28_29" /> | |||
== | == Human recognition and alarm initiation == | ||
A [[Fire alarm system]] | A manual call point relies on a person to initiate a [[Fire alarm system]]. The initiating sequence begins before the device is operated. Someone must become aware of a possible fire, recognise the situation and act on that information. New Zealand's C/VM2, second edition (2025), explicitly identifies this human interaction as a difficulty when predicting manual alarm activation.<ref name="CVM_29">Ministry of Business, Innovation and Employment (2025), p. 29.</ref> | ||
The International Fire Engineering Guidelines (IFEG, 2005) distinguish several ways people can receive fire cues: these include seeing smoke or flames, smelling smoke and hearing sounds associated with the fire. Someone who recognises such a cue may also warn other people. Cue occurrence, recognition and the resulting response are separate parts of its analysis.<ref name="IFEG_1.8-7_1.8-9">Australian Building Codes Board et al. (2005), pp. 1.8-7–1.8-9.</ref> | |||
The physical act of operating the call point is therefore only one part of manual initiation. The time at which a person first notices the fire may dominate the earlier sequence. People in enclosed rooms may receive different information from those in an open warehouse. A credible assessment identifies who is expected to notice the fire and what information reaches them.<ref name="CVM_28_29" /><ref name="IFEG_1.8-7_1.8-9" /> | |||
[[File:fse-manual-call-point-v1.svg|thumb|upright=1.5|alt=Person sees fire, reaches and operates call point, and alarm notifies occupants.|Manual initiation depends on human recognition and action. Based on Ministry of Business, Innovation and Employment (2025), p. 29 and Australian Building Codes Board et al. (2005), p. 1.8-7.]] | |||
== | == Relationship to automatic detection and warning == | ||
Automatic detection responds to a fire signature through a sensor rather than waiting for human operation of a call point. The SFPE Handbook describes detection, processing and signalling as separate alarm-system functions. Manual initiation changes the source of the input without removing the need for processing and a suitable output. The subsequent warning still has to reach the people expected to act.<ref name="SMC_4-3" /><ref name="CVM_29" /> | |||
An [[Evacuation alarm system]] supplies the warning that supports occupant response. Hearing a signal is not equivalent to immediately starting evacuation travel. Proulx describes information seeking, preparation and the influence of staff instructions on this response. Manual operation by one person therefore does not establish that everyone else has recognised the emergency.<ref name="P_3-349_3-351">Proulx (2002), pp. 3-349–3-351.</ref> | |||
Manual and automatic initiation can provide alternative paths within a design. IFEG gives an example in which occupants, smoke detectors or sprinklers can identify a fire; its redundancy analysis asks what remains available if a component fails. The benefit of several inputs depends on the functioning of the complete paths to the required action.<ref name="IFEG_1.2-24">Australian Building Codes Board et al. (2005), p. 1.2-24.</ref> | |||
A manually operated input cannot be credited merely because the device is present. The fire needs to become perceptible to someone who can recognise and respond to it. In a modelling method, those human and spatial conditions can restrict where manual initiation is accepted. C/VM2's warehouse provisions provide a specific example of such restrictions.<ref name="CVM_26__28_29">Ministry of Business, Innovation and Employment (2025), pp. 26, 28–29.</ref> | |||
== | == A conditional New Zealand warehouse method == | ||
C/VM2 | In New Zealand, C/VM2 (2025) permits its manual-activation approach only under stated conditions. The space must have an average ceiling height of at least 5 m. Occupants must be awake and familiar with their surroundings, and the occupant load must be fewer than 50 people. Other situations require automatic detection under that method.<ref name="CVM_28">Ministry of Business, Innovation and Employment (2025), p. 28.</ref> | ||
The commentary explains the intended large-space application through warehouses. A high ceiling allows smoke to move beneath it before conditions threaten occupants below. The method assumes that occupants become aware of the fire when the ceiling jet has traversed the entire length of the space. It uses this smoke-transport period as a proxy for the delay before manual activation.<ref name="CVM_26__28_29" /> | |||
Within that particular approach, no additional notification or pre-travel activity period is added for the open warehouse population. The method expects the simple call-point system to activate immediately once operated, and this is a combined modelling assumption about recognition and action. It is not evidence that real occupants always operate a call point without delay.<ref name="CVM_28_29" /> | |||
The | The method also addresses intermediate floors: they must be open, with occupants fully aware of a fire located in the warehouse. An enclosed intermediate room would change the assumed access to fire cues. The permission therefore depends on both building geometry and the occupants' opportunity to recognise the event.<ref name="CVM_29" /> | ||
== | [[File:fse-manual-call-point-v2.svg|thumb|upright=1.5|alt=Open warehouse supports manual recognition; enclosed office needs automatic detection.|Layout determines whether manual initiation is credible. Based on Ministry of Business, Innovation and Employment (2025), pp. 28–29.]] | ||
== Separated rooms and the means of escape == | |||
C/VM2 treats occupied rooms separated from the high-ceiling space as a distinct case. Under its 2025 provisions, the small room may have a maximum area of 500 m², and it must be on the ground floor and have an escape route directly outside. Occupants must not need to enter the high-ceiling warehouse to use that route.<ref name="CVM_29" /> | |||
The method assigns those room occupants 60 s of pre-travel activity after manual activation, and this additional period belongs to the separated-room provision. It differs from the open warehouse assumption that adds no further notification or pre-travel activity time. Mixing the two cases would remove a condition from the prescribed assessment.<ref name="CVM_29" /> | |||
The escape | The required [[Means of escape]] are therefore part of this permission to use manual initiation. The direct outside route matters alongside room size and floor level. If the separated-office conditions are not satisfied, C/VM2 requires automatic detection within the office. Its detection and notification periods then follow the relevant automatic-system provisions.<ref name="CVM_29" /> | ||
= | A further exception concerns very small isolated ground-floor spaces, such as washrooms or offices. Each must be no larger than 30 m², and their aggregate occupant load must not exceed ten people. C/VM2 assigns 60 s of pre-travel activity to escape from these spaces. These numerical limits belong to the specified New Zealand method and edition.<ref name="CVM_29" /> | ||
[[ | [[File:fse-manual-call-point-v3.svg|thumb|upright=1.5|alt=After activation, a 60-second pre-travel block precedes movement along a direct outside route.|Small-space method includes 60 seconds and a direct outside route. Based on Ministry of Business, Innovation and Employment (2025), p. 29.]] | ||
== Occupants, staff and management assumptions == | |||
Recognition of a fire is affected by the information available to the person. Proulx describes the influence of familiarity, responsibility, alertness and commitment to the activity already underway. A visitor may wait for staff instructions while a familiar occupant interprets the situation differently. These factors help explain why human initiation cannot be reduced to one universal delay.<ref name="P_3-350_3-351" /> | |||
Staff training is connected to the actual building and its evacuation procedure. Proulx notes that people trained in one building may not behave the same way in another. Public occupants may have no training specific to the premises they are visiting. Where a strategy relies on staff recognition and response, their role needs to match the credited action.<ref name="P_3-350">Proulx (2002), p. 3-350.</ref> | |||
[[Fire safety management]] therefore supports the human part of the alarm arrangement, and it concerns the procedures and staff behaviour assumed when interpreting and responding to a fire cue. IFEG requires the cue used in an analysis to be selected and justified. Assuming early manual initiation without identifying the relevant occupants would leave that part of the sequence unexplained.<ref name="P_3-350_3-351" /><ref name="IFEG_1.8-7_1.8-9" /> | |||
Warnings from other people can also matter. IFEG recognises them as an alternative cue, while Proulx reports the influence of direct staff instructions on movement. Such warnings may reinforce the alarm signal or precede it. Their usefulness depends on the people present and the information they can communicate.<ref name="IFEG_1.8-7_1.8-9" /><ref name="P_3-349_3-351" /> | |||
== Evidence and limits of the assessment == | |||
The C/VM2 example describes when manual initiation may be used in a particular engineering calculation. It does not supply a universal permission to omit automatic detection from warehouses. The specified ceiling, occupant and room conditions have to be considered together. A superficially similar building may fall outside that method's stated application.<ref name="CVM_26__28_29" /> | |||
IFEG identifies limitations in methods for predicting the period before people start moving. It accepts documented literature, field observations and simulated evacuations as potential evidence, with substantiated engineering judgement where necessary. The source of an assumed manual response time therefore matters. A precise input without a stated basis can conceal uncertainty in recognition and action.<ref name="IFEG_1.8-7">Australian Building Codes Board et al. (2005), p. 1.8-7.</ref> | |||
Redundancy does not remove this uncertainty automatically. Multiple initiating routes may still rely on shared processing or signalling functions. IFEG's redundancy study examines single points of failure and available backup, including whether failures would be recognised. This functional analysis distinguishes an alternative means of initiation from an independently available warning.<ref name="IFEG_1.2-24" /> | |||
== See also == | == See also == | ||
* [[ | * [[Evacuation strategy]] | ||
* [[ | * [[Pre-movement time]] | ||
* [[ | * [[Smoke detector]] | ||
== Notes == | == Notes == | ||
| Line 111: | Line 79: | ||
== References == | == References == | ||
* Australian Building Codes Board, National Research Council of Canada, International Code Council, & Department of Building and Housing New Zealand. (2005). ''International fire engineering guidelines'' | * Australian Building Codes Board, National Research Council of Canada, International Code Council, & Department of Building and Housing New Zealand. (2005). ''International fire engineering guidelines''. Australian Building Codes Board. | ||
* Ministry of Business, Innovation and Employment. (2025). ''C protection from fire: Verification method C/VM2'' (2nd ed.) | * Ministry of Business, Innovation and Employment. (2025). ''C protection from fire: Verification method C/VM2'' (2nd ed.). | ||
* Proulx, G. (2002). Movement of people: The evacuation timing. In P. J. DiNenno (Ed.), ''SFPE handbook of fire protection engineering'' (3rd ed.). National Fire Protection Association. | * Proulx, G. (2002). Movement of people: The evacuation timing. In P. J. DiNenno (Ed.), ''SFPE handbook of fire protection engineering'' (3rd ed., pp. 3-342–3-366). National Fire Protection Association. | ||
* Schifiliti, R. P., Meacham, B. J., & Custer, R. L. P. (2002). Design of detection systems. In P. J. DiNenno (Ed.), ''SFPE handbook of fire protection engineering'' (3rd ed.). National Fire Protection Association. | * Schifiliti, R. P., Meacham, B. J., & Custer, R. L. P. (2002). Design of detection systems. In P. J. DiNenno (Ed.), ''SFPE handbook of fire protection engineering'' (3rd ed., pp. 4-1–4-43). National Fire Protection Association. | ||
[[Category:Detection & Alarm]] | [[Category:Detection & Alarm]] | ||
Latest revision as of 19:45, 2 November 2026
A manual call point is a device that allows a person to initiate a fire alarm after recognising a possible fire. Its operation relies on human action rather than an automatic sensing element. Predicting the time to alarm therefore requires consideration of how the fire is noticed and when someone acts.[1]
Manual initiation can form part of a wider detection and warning arrangement, and it provides an input to the alarm system, which must then communicate the intended warning or protective command. Other occupants may still need time to understand the warning and prepare to leave. The person operating the device and the people receiving the alarm perform different roles.[2][3]
Engineering methods may restrict the circumstances in which manual activation can replace an automatic detection assumption. New Zealand's C/VM2 (2025), for example, sets conditions for high-ceiling spaces with limited numbers of awake, familiar occupants. Its treatment of enclosed offices also depends on room size, floor level and the escape route.[1]
Human recognition and alarm initiation
A manual call point relies on a person to initiate a Fire alarm system. The initiating sequence begins before the device is operated. Someone must become aware of a possible fire, recognise the situation and act on that information. New Zealand's C/VM2, second edition (2025), explicitly identifies this human interaction as a difficulty when predicting manual alarm activation.[4]
The International Fire Engineering Guidelines (IFEG, 2005) distinguish several ways people can receive fire cues: these include seeing smoke or flames, smelling smoke and hearing sounds associated with the fire. Someone who recognises such a cue may also warn other people. Cue occurrence, recognition and the resulting response are separate parts of its analysis.[5]
The physical act of operating the call point is therefore only one part of manual initiation. The time at which a person first notices the fire may dominate the earlier sequence. People in enclosed rooms may receive different information from those in an open warehouse. A credible assessment identifies who is expected to notice the fire and what information reaches them.[1][5]
Relationship to automatic detection and warning
Automatic detection responds to a fire signature through a sensor rather than waiting for human operation of a call point. The SFPE Handbook describes detection, processing and signalling as separate alarm-system functions. Manual initiation changes the source of the input without removing the need for processing and a suitable output. The subsequent warning still has to reach the people expected to act.[2][4]
An Evacuation alarm system supplies the warning that supports occupant response. Hearing a signal is not equivalent to immediately starting evacuation travel. Proulx describes information seeking, preparation and the influence of staff instructions on this response. Manual operation by one person therefore does not establish that everyone else has recognised the emergency.[6]
Manual and automatic initiation can provide alternative paths within a design. IFEG gives an example in which occupants, smoke detectors or sprinklers can identify a fire; its redundancy analysis asks what remains available if a component fails. The benefit of several inputs depends on the functioning of the complete paths to the required action.[7]
A manually operated input cannot be credited merely because the device is present. The fire needs to become perceptible to someone who can recognise and respond to it. In a modelling method, those human and spatial conditions can restrict where manual initiation is accepted. C/VM2's warehouse provisions provide a specific example of such restrictions.[8]
A conditional New Zealand warehouse method
In New Zealand, C/VM2 (2025) permits its manual-activation approach only under stated conditions. The space must have an average ceiling height of at least 5 m. Occupants must be awake and familiar with their surroundings, and the occupant load must be fewer than 50 people. Other situations require automatic detection under that method.[9]
The commentary explains the intended large-space application through warehouses. A high ceiling allows smoke to move beneath it before conditions threaten occupants below. The method assumes that occupants become aware of the fire when the ceiling jet has traversed the entire length of the space. It uses this smoke-transport period as a proxy for the delay before manual activation.[8]
Within that particular approach, no additional notification or pre-travel activity period is added for the open warehouse population. The method expects the simple call-point system to activate immediately once operated, and this is a combined modelling assumption about recognition and action. It is not evidence that real occupants always operate a call point without delay.[1]
The method also addresses intermediate floors: they must be open, with occupants fully aware of a fire located in the warehouse. An enclosed intermediate room would change the assumed access to fire cues. The permission therefore depends on both building geometry and the occupants' opportunity to recognise the event.[4]
Separated rooms and the means of escape
C/VM2 treats occupied rooms separated from the high-ceiling space as a distinct case. Under its 2025 provisions, the small room may have a maximum area of 500 m², and it must be on the ground floor and have an escape route directly outside. Occupants must not need to enter the high-ceiling warehouse to use that route.[4]
The method assigns those room occupants 60 s of pre-travel activity after manual activation, and this additional period belongs to the separated-room provision. It differs from the open warehouse assumption that adds no further notification or pre-travel activity time. Mixing the two cases would remove a condition from the prescribed assessment.[4]
The required Means of escape are therefore part of this permission to use manual initiation. The direct outside route matters alongside room size and floor level. If the separated-office conditions are not satisfied, C/VM2 requires automatic detection within the office. Its detection and notification periods then follow the relevant automatic-system provisions.[4]
A further exception concerns very small isolated ground-floor spaces, such as washrooms or offices. Each must be no larger than 30 m², and their aggregate occupant load must not exceed ten people. C/VM2 assigns 60 s of pre-travel activity to escape from these spaces. These numerical limits belong to the specified New Zealand method and edition.[4]
Occupants, staff and management assumptions
Recognition of a fire is affected by the information available to the person. Proulx describes the influence of familiarity, responsibility, alertness and commitment to the activity already underway. A visitor may wait for staff instructions while a familiar occupant interprets the situation differently. These factors help explain why human initiation cannot be reduced to one universal delay.[3]
Staff training is connected to the actual building and its evacuation procedure. Proulx notes that people trained in one building may not behave the same way in another. Public occupants may have no training specific to the premises they are visiting. Where a strategy relies on staff recognition and response, their role needs to match the credited action.[10]
Fire safety management therefore supports the human part of the alarm arrangement, and it concerns the procedures and staff behaviour assumed when interpreting and responding to a fire cue. IFEG requires the cue used in an analysis to be selected and justified. Assuming early manual initiation without identifying the relevant occupants would leave that part of the sequence unexplained.[3][5]
Warnings from other people can also matter. IFEG recognises them as an alternative cue, while Proulx reports the influence of direct staff instructions on movement. Such warnings may reinforce the alarm signal or precede it. Their usefulness depends on the people present and the information they can communicate.[5][6]
Evidence and limits of the assessment
The C/VM2 example describes when manual initiation may be used in a particular engineering calculation. It does not supply a universal permission to omit automatic detection from warehouses. The specified ceiling, occupant and room conditions have to be considered together. A superficially similar building may fall outside that method's stated application.[8]
IFEG identifies limitations in methods for predicting the period before people start moving. It accepts documented literature, field observations and simulated evacuations as potential evidence, with substantiated engineering judgement where necessary. The source of an assumed manual response time therefore matters. A precise input without a stated basis can conceal uncertainty in recognition and action.[11]
Redundancy does not remove this uncertainty automatically. Multiple initiating routes may still rely on shared processing or signalling functions. IFEG's redundancy study examines single points of failure and available backup, including whether failures would be recognised. This functional analysis distinguishes an alternative means of initiation from an independently available warning.[7]
See also
Notes
- ↑ 1.0 1.1 1.2 1.3 Ministry of Business, Innovation and Employment (2025), pp. 28–29.
- ↑ 2.0 2.1 Schifiliti, Meacham, and Custer (2002), p. 4-3.
- ↑ 3.0 3.1 3.2 Proulx (2002), pp. 3-350–3-351.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 Ministry of Business, Innovation and Employment (2025), p. 29.
- ↑ 5.0 5.1 5.2 5.3 Australian Building Codes Board et al. (2005), pp. 1.8-7–1.8-9.
- ↑ 6.0 6.1 Proulx (2002), pp. 3-349–3-351.
- ↑ 7.0 7.1 Australian Building Codes Board et al. (2005), p. 1.2-24.
- ↑ 8.0 8.1 8.2 Ministry of Business, Innovation and Employment (2025), pp. 26, 28–29.
- ↑ Ministry of Business, Innovation and Employment (2025), p. 28.
- ↑ Proulx (2002), p. 3-350.
- ↑ Australian Building Codes Board et al. (2005), p. 1.8-7.
References
- Australian Building Codes Board, National Research Council of Canada, International Code Council, & Department of Building and Housing New Zealand. (2005). International fire engineering guidelines. Australian Building Codes Board.
- Ministry of Business, Innovation and Employment. (2025). C protection from fire: Verification method C/VM2 (2nd ed.).
- Proulx, G. (2002). Movement of people: The evacuation timing. In P. J. DiNenno (Ed.), SFPE handbook of fire protection engineering (3rd ed., pp. 3-342–3-366). National Fire Protection Association.
- Schifiliti, R. P., Meacham, B. J., & Custer, R. L. P. (2002). Design of detection systems. In P. J. DiNenno (Ed.), SFPE handbook of fire protection engineering (3rd ed., pp. 4-1–4-43). National Fire Protection Association.