Glossary 329
Progress Schedule A diagram, graph or other pictorial or written schedule showing proposed and
actual of starting and completion of the various elements of the work.
Project Cost Total cost of the project including construction cost, professional compensation, land
costs, furnishings and equipment, financing and other charges.
Projection A technique for showing one or more sides of an object to give the impression of a draw-
ing of a solid object.
Project Manual The volume(s) prepared by the architect for a project which may include the bidding
requirements, sample forms and conditions of the contract and the specifications.
Projector The theoretical extended line of sight used to create a perspective or view of an object.
Purlin A horizontal roof member that is laid perpendicular to rafters to help limit deflections.
Quarry Tile An unglazed, machine made tile.
Quick Set A fast-curing cement plaster.
Rabbet A rectangular groove cut on the edge of a board.
Rafter A sloping or horizontal beam used to support a roof.
Radius A straight line from the center of a circle or sphere to its circumference or surface.
Rake Joint A recessed mortar joint.
Ramp A walking surface which has a running slope greater than 1:20.
Readily Accessible Describes areas of the subject property that are promptly made available for
observation by the field observer at the time of the walk-through survey and do not require the removal of
materials or personal property, such as furniture, and that are safely accessible in the opinion of the field
observer.
Record Drawings Construction drawing revised to show significant changes made during the con-
struction process, usually based on marked-up prints, drawing and other data furnished by the contracts to
the architect. Preferable to as built drawings.
Reference Designation A combination of letters and numbers to identify parts on electrical and
electronic drawings. The letters designate the type of part, and the numbers designate the specific part.
Example: reference designator R-12 indicates the 12th resistor in a circuit.
Reference Numbers They consist of numbers used on a drawing to refer the reader to another
drawing for more detail or other information.
Reference Plane The normal plane that all information is referenced
Register An opening in a duct for the supply of heated or cooled air.
Relative Humidity The amount of water vapor in the atmosphere compared to the maximum possi-
ble amount at the same temperature.
Release of Lien Instrument executed by a person or entity supplying labor, materials or professional
services on a Project which releases that person’s or entity’s mechanic’ lien against the Project property.
Remaining Useful Life (RUL) A subjective estimate based upon observations, or average esti-
mates of similar items, components, or systems, or a combination thereof, of the number of remaining
years that an item, component, or system is estimated to be able to function in accordance with its intended
purpose before warranting replacement. Such period of time is affected by the initial quality of an item, com-
ponent, or system, the quality of the initial installation, the quality and amount of preventive maintenance
exercised, climatic conditions, extent of use, etc.
Removed Section A drawing of an object’s internal cross section located near the basic drawing of
the object.