BOABC Building Official Level I key terms

The process of assigning a building or portion of it to a use group based on how it will be used, which then determines allowable height, area, and construction requirements.

A category such as assembly, business, educational, factory, hazardous, institutional, mercantile, residential, storage, or utility that groups buildings with similar life-safety characteristics.

A building containing two or more distinct occupancy classifications, which may be treated as separated or nonseparated depending on fire-resistance features and code allowances.

A classification describing the fire-resistance of structural elements, ranging from heavily protected noncombustible types to unprotected combustible types, used with occupancy to set height and area limits.

The duration, usually expressed in hours, that a building element resists fire exposure under standardized test conditions, determined by an approved testing method or listed design.

A fire-resistance-rated wall, floor, or assembly that divides a building into separate areas or separates occupancies to limit fire and smoke spread.

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

The portion of the means of egress that leads from an occupied space to an exit, such as aisles, corridors, and intervening rooms.

The final component of the means of egress, leading from an exit to a public way such as a street, alley, or other open space.

The measured length along the natural path of travel from the most remote point in a space to an exit or exit access doorway, limited by occupancy and sprinkler status.

The portion of exit access travel that occupants must traverse before reaching a point where two separate routes to an exit are available.

A corridor segment with only one direction of travel to an exit, limited in length by code because occupants could be trapped if fire blocks that single route.

The clear capacity dimension of a corridor, stair, door, or other egress component, sized by occupant load and minimum code values to prevent crowding.

The total number of people a space is designed to hold, calculated by dividing floor area by a use-specific factor or by counting fixed seats and similar methods.

A continuous, unobstructed path connecting accessible elements and spaces that meets requirements for width, slope, surface, and changes in level.

A continuous path of travel to a public way that can be used by people with disabilities, including features such as areas of refuge and accessible routes.

A space protected from fire and smoke where people unable to use stairs can wait for assistance, typically required in certain high-rise or accessible egress designs.

The unobstructed area required for a single wheelchair or mobility device to approach, use, or maneuver around a fixture, control, or element.

A circular or T-shaped clear area that allows a wheelchair user to change direction within a room or space, often required in accessible toilet rooms.

A network of piping and heat-actuated sprinklers that discharges water automatically over a fire area, often granting code allowances for height, area, and egress.

An integrated set of devices that detects fire or smoke and signals occupants and responders through audible, visible, and transmitted notifications.

A continuous membrane or assembly designed to resist the passage of smoke, used to protect means of egress and limit smoke movement between areas.

A protective barrier installed along open sides of floors, roofs, stairs, and balconies to prevent falls, with minimum height and load resistance requirements.

A rail graspable by the hand, provided along stairs and ramps to give users stability and support, with requirements for height, continuity, and clearance.

A series of steps providing egress between floor levels, regulated for tread depth, riser height, headroom, width, landings, and enclosure.

The systematic examination of construction documents before permit issuance to confirm compliance with code requirements for life safety, structure, and accessibility.

Drawings, specifications, calculations, and other submittals prepared by a design professional that describe the work and demonstrate code compliance.

Official written authorization to perform construction or alteration work, issued after review confirms the proposed work meets applicable code requirements.

A document issued after final inspection confirming a building or space may lawfully be occupied for its approved use and occupancy classification.

On-site verification by a building official or inspector that work matches approved plans and meets code, performed at required stages such as foundation, framing, and final.

The last required inspection, confirming all permitted work is complete, corrections are resolved, and the building is ready for occupancy approval.

A written directive halting work that is being performed contrary to code or approved plans, issued to protect safety until violations are corrected.

A formal written notice informing a permit holder or owner of code deficiencies, required corrections, and deadlines for compliance.

An authorized deviation from a code requirement granted when strict application would cause practical difficulty or unnecessary hardship, subject to documented findings.

A formal request for review of a decision, interpretation, or order made by the building official, heard by an established board or authority.

The set of construction documents stamped and retained by the permitting authority as the official record against which field work is inspected.

Drawings revised to reflect actual constructed conditions, including field changes, used to document deviations from the originally approved plans.

A written record issued during inspection listing deficiencies observed on site and requiring correction and reinspection before work may proceed.