OBC Fire Protection key terms

A stated goal of the Code describing the level of safety a building must provide, such as protecting occupants, firefighters, and neighbouring property from fire and its effects.

A qualitative statement describing what a building element or system must do to satisfy an objective, such as limiting the spread of fire or providing a safe path out.

A prescriptive rule in the Code that, if followed, is deemed to satisfy the related objective and functional statement without further analysis or engineering demonstration.

A design approach that differs from the prescriptive rules but demonstrates, through analysis such as fire modelling or engineering judgement, that the objectives and functional statements are met.

The principal use or classification of a building or part of it, such as residential, mercantile, industrial, or assembly, which drives the fire protection requirements applied to that space.

The total number of persons that may occupy a floor area or building at one time, calculated from the floor area divided by the occupant load factor for the use.

An industrial classification for buildings or areas where combustible or flammable materials are processed or stored in quantities or forms that create a severe fire or explosion risk.

The time in hours or minutes that a building assembly resists the passage of fire while maintaining its structural integrity, as established by standardized fire test or accepted calculation methods.

A construction assembly that separates spaces and delays the spread of fire between them, required to have a fire-resistance rating determined by the occupancy and building height.

A device or assembly installed in an opening of a fire separation, such as a door or shutter, that resists the passage of fire when closed and is rated to match the separation.

A rated door assembly, including frame and hardware, installed in a fire separation to permit passage while providing a specified resistance to fire when in the closed position.

A material or system installed to seal penetrations and joints in fire-rated assemblies so the assembly retains its fire-resistance rating and smoke is restricted from passing through.

The distance measured from an exposing building face to the property line, centreline of a street, or another building, used to determine required exterior wall fire protection.

The exterior wall of a building, including its windows and other openings, that could transmit fire to an adjacent building or property, characterized by its area and construction.

The use of distance between buildings, combined with limits on unprotected openings and wall construction, to reduce the chance of fire spreading from one building to another.

A continuous and unobstructed path of travel from any point in a building to a public way, made up of exit access, the exit itself, and exit discharge.

That portion of a means of egress that is separated from other interior spaces by fire separation and leads to the exterior or to an exit discharge.

The portion of a means of egress between the end of an exit and a public way, such as an exterior walkway or yard, that allows occupants to disperse safely.

The measured length of the path an occupant must follow from a point in a floor area to the nearest exit, limited by the Code according to occupancy and sprinkler protection.

The clear width of an exit or corridor available for occupants to pass, sized from the occupant load so that people can move without crowding or delay.

A network of initiating devices, control equipment, and notification appliances that detects a fire condition and alerts occupants and, where required, the fire department.

A device that senses products of combustion in the air and sends a signal to the fire alarm control panel to initiate alarm and notification functions.

A device that responds to a rise in temperature or to a fixed temperature threshold, used where smoke detection is unsuitable or as supplementary detection.

An emergency announcement system that delivers spoken instructions to occupants during a fire, required in certain high buildings and large assembly occupancies.

A piping network with heat-actuated sprinklers that discharges water automatically over a fire area to control or extinguish it, often reducing other Code requirements.

A fixed piping system with hose connections at locations in a building, allowing firefighters or trained occupants to attach hoses and apply water at height or distance.

A pump installed to boost water pressure and flow in a sprinkler or standpipe system so that design demand is met at the most remote outlets.

An engineered arrangement of fans, dampers, and barriers that limits smoke movement in a building, protecting exit stairs and occupant evacuation routes during a fire.

A vertical enclosure designed to draw smoke upward and out of a building under fire conditions, reducing smoke spread into adjacent occupied spaces.

Provisions that allow firefighters to reach and operate in a building, including access routes, fire department connections, hydrants, and access panels or stairways.

A self-contained dwelling unit located within a house or small residential building, subject to specific fire separation, egress, and alarm requirements in Part 9.

A self-contained device that detects smoke and sounds an audible warning locally, required in dwelling units to provide early warning to sleeping occupants.

A liquid with a low flash point that gives off vapours capable of igniting at normal temperatures, requiring special storage, handling, and ventilation controls.

A liquid with a higher flash point than a flammable liquid that can still burn and produce ignitable vapours when heated, subject to storage and handling rules.

The lowest temperature at which a liquid gives off enough vapour to form an ignitable mixture near its surface, used to classify liquids by fire hazard.

A risk arising when fine combustible dust suspended in air ignites, producing a rapid pressure rise that can damage structures and propagate through a facility.