PAQE key terms

The pre-design phase in which the architect documents the client's goals, functional requirements, space needs, occupancy counts, and budget constraints, producing a written program that guides all later design decisions.

The usable floor area of spaces that directly serve building occupants, such as offices, labs, and classrooms, excluding circulation, mechanical, and structural zones. It is the basis for space-program area totals.

A grid that rates the desired proximity or separation between each pair of programmed spaces, helping the designer test bubble diagrams and stacking options against functional relationships before laying out rooms.

A schematic vertical organization showing which programmed space groups occupy each floor of a multi-story building, used to test core placement, structure, and vertical circulation before floor plans are drawn.

The ratio of a building's total gross floor area to the area of its lot. Zoning codes use it to cap building bulk, and it directly determines how many floors a given footprint can support.

The minimum horizontal distance a building must be held back from a property line, street, or other reference line, established by zoning to protect light, air, and privacy.

In zoning, the three-dimensional volume within which a building may rise, defined by setbacks, height limits, and sky-exposure planes. It is distinct from the envelope assembly of walls and roof.

The overall three-dimensional form and bulk of a building, including its height, width, roof shape, and articulation. Massing studies test how a volume meets zoning limits and fits its context.

The relationship of a building's facades and openings to the path of the sun, used to place glazing, shading, and occupied spaces where solar heat gain and daylight are most beneficial.

A polar chart plotting the sun's altitude and azimuth for a given latitude across the year, letting designers predict shadow patterns, overheating risk, and shading needs for each facade.

Designing fenestration, room depth, and surface reflectance so that natural light provides usable illumination for occupants, reducing electric lighting demand while controlling glare and heat gain.

The area of glass in a wall assembly divided by the gross wall area, used in energy codes to limit heat loss, solar gain, and peak loads attributable to fenestration.

The overall rate of heat transfer through an assembly per unit area and temperature difference, expressed in units such as Btu/h·ft²·°F. Lower values indicate better insulating performance.

A path of high-conductivity material, such as a steel stud or slab edge, that bypasses insulation and increases heat flow through an assembly, degrading its effective thermal performance.

Rigid insulation placed outboard of the structure and framing, uninterrupted by studs or other conductive elements, to control thermal bridging and improve envelope performance.

A material of low permeance installed to limit moisture vapor diffusion through an assembly, positioned according to climate so that condensation does not form within the wall or roof.

A continuous, sealed layer that resists uncontrolled air leakage through the envelope. It is distinct from the vapor retarder, though a single material may serve both functions.

A diagnostic test that pressurizes a building with a calibrated fan and measures leakage, expressed as air changes per hour at a reference pressure, to verify envelope airtightness.

A wall strategy in which an outer cladding layer sheds most rain while a drained and vented cavity behind it manages any water that penetrates, protecting the backup weather barrier.

The regular spacing of columns and beams that establishes bay sizes and load paths, coordinating with parking modules, room layouts, and mechanical distribution in the planning process.

The distance between adjacent column lines in either direction, which sets the clear span available for parking, offices, or equipment and strongly influences structural cost and layout flexibility.

The continuous route by which gravity, wind, and seismic forces travel from the point of application through structural members down to the foundation and the ground.

The structural elements, such as shear walls, braced frames, or moment frames, that resist wind and seismic forces and control building drift and torsion.

A seismic strategy in which flexible bearings separate the superstructure from the foundation, lengthening the building's period and reducing the accelerations transmitted during an earthquake.

The clear width of corridors, stairs, and doors required to carry the occupant load out of a building, calculated from the number of occupants served and the code's capacity factors.

The number of persons a space is calculated to hold, derived from its floor area and use-based density factors. It drives egress width, exit count, and plumbing fixture counts.

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

A corridor segment with only one direction of travel to an exit, permitted only up to a limited length because occupants could be trapped if fire blocks the single path.

The measured length of the egress path from the most remote point in a space to the nearest exit, limited by code according to occupancy and whether sprinklers are provided.

A continuous, unobstructed path connecting accessible elements and spaces, meeting limits on slope, width, surface, and change in level so that a wheelchair user can travel independently.

The minimum unobstructed area, typically a rectangle sized for a wheelchair, required at fixtures, controls, and doors so a user can approach, use, and turn around.

The diameter of the circle a wheelchair needs to reverse direction, commonly 60 inches for a full turn, governing the size of vestibules, toilet rooms, and dead-end conditions.

The written portion of construction documents describing materials, workmanship, and quality standards, organized by division and coordinated with the drawings to define the contract scope.

A specification that states required results, such as fire rating or thermal performance, and leaves the means of achieving them to the contractor, rather than naming a specific product or method.

A document recording the assumptions, codes, loads, and performance criteria underlying the design, giving reviewers and bidders a verifiable record of what the design must achieve.

A quality-assurance process that verifies building systems are installed, tested, and operating according to the owner's requirements and the basis of design before occupancy.

The degree of skill and care that a reasonably competent architect would exercise under similar circumstances, which defines the benchmark for judging professional negligence.

The written description of work the architect will perform, including phases, deliverables, and exclusions, forming the basis for fees and for limiting responsibility.

The exposure of a design professional to claims for economic loss or injury caused by negligent performance, typically insured by errors and omissions coverage rather than general liability.