ICC PCS key terms

A membership association that develops and publishes model construction codes, including the International Building Code, International Residential Code, and International Fire Code, used as the basis for local regulation.

A model code governing the design and construction of buildings, covering occupancy classification, fire resistance, means of egress, structural loads, and interior finishes, adopted with local amendments by jurisdictions.

A model code that regulates one- and two-family dwellings and townhouses of limited height, addressing construction, mechanical, plumbing, and electrical provisions in a single prescriptive document.

A model code focused on fire prevention, protection, and life safety in existing and new buildings, covering hazardous materials, fire apparatus access, and fire protection systems.

A standardized set of construction requirements drafted by a national organization for voluntary adoption by jurisdictions, which then enforce it as law with possible amendments.

A jurisdiction-specific change to an adopted model code, such as revised height limits, snow loads, or permit thresholds, that supersedes the model text within that jurisdiction.

The formal steps a jurisdiction takes to make a model code legally enforceable, typically including public review, a legislative vote, an effective date, and any amendments.

The organization, office, or individual responsible for approving equipment, materials, installations, or procedures and for enforcing code requirements in a given area.

The grouping of a building or space by its intended use, such as assembly, business, educational, factory, or residential, which determines allowable height, area, and fire protection requirements.

The computed number of persons a space is designed to hold, calculated from floor area and use-based factors, and used to size exits and egress components.

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

The portion of a means of egress that leads from an occupied space to an exit, including aisles, corridors, and the travel distance within the space served.

The portion of a means of egress between the termination of an exit and a public way, such as an exterior door, exterior ramp, or open yard.

The clear width provided along an egress path, determined by multiplying occupant load by a use-specific capacity factor, with minimums for corridors, stairs, and doors.

The measured length of the path a building occupant must follow from the most remote point in a space to an exit, limited by occupancy and sprinkler protection.

The period, in hours or minutes, that a building assembly resists fire exposure under a standardized test, used to size structural protection and separation between areas.

The distance measured from the building exterior wall to the lot line, adjacent building, or centerline of a street, used to set allowable openings and exterior wall fire ratings.

A fire-resistance-rated wall assembly, continuous from floor to roof deck, designed to restrict the spread of fire and typically supporting the roof structure.

A fire-resistance-rated interior wall assembly that separates spaces within a floor, such as dwelling unit separations or corridor walls, but does not necessarily support structural loads.

A network of piping and heat-activated heads that discharges water to control or extinguish a fire, often allowing reduced fire ratings, longer travel distances, or increased building area.

A fixed piping arrangement with hose connections at various levels, allowing building occupants or firefighters to attach hoses and deliver water to fight fires inside a building.

An interconnected set of initiating devices, notification appliances, and controls that detects fire conditions and alerts occupants, often required by occupancy and building height.

The AHJ's examination of submitted construction documents before permit issuance to verify that proposed work complies with the applicable code and approved standards.

A written authorization issued by a jurisdiction allowing specified construction work to proceed, contingent on plan review, fee payment, and compliance with code requirements.

An on-site verification by the AHJ that construction matches approved plans and code requirements at defined stages, such as foundation, framing, and final completion.

A document issued by the AHJ confirming that a completed building or space complies with applicable codes and may lawfully be occupied for its intended use.

Code requirements stated as fixed, measurable rules, such as a specific nail spacing or stud size, that can be applied without engineering analysis or alternative design.

An alternative compliance method in which a design is shown by engineering analysis or fire modeling to meet stated safety goals rather than following fixed prescriptive rules.

A code provision allowing approval of designs, products, or construction methods not specifically prescribed, provided the AHJ finds them equivalent in quality, strength, and safety.

A building containing two or more occupancy classifications, requiring either separated occupancies with fire-rated assemblies or nonseparated analysis of height and area.

A single unit providing complete, independent living facilities for one or more persons, including permanent provisions for living, sleeping, cooking, and sanitation.

A street, alley, or other parcel of land open to the outdoors and permanently appropriated to public use, serving as the destination of an exit discharge.

A continuous, unobstructed path connecting accessible elements and spaces that meets dimensional requirements for width, slope, and surface, allowing use by people with disabilities.

A classification of building construction based on the fire resistance of structural elements, such as structural frame, bearing walls, and floor assemblies, ranging from fire-resistive to combustible.

The maximum floor area permitted per story for a building, determined by occupancy classification, construction type, frontage, and whether automatic sprinkler protection is provided.

An external technical document, such as a testing or installation standard, that a model code incorporates by citation and thereby makes part of its enforceable requirements.

A designated representative of the jurisdiction who administers and enforces code provisions, reviews plans, conducts inspections, and issues permits and occupancy certificates.