Architectural and Engineering Glossary

P

Pole Type Transformer

A transformer suitable for mounting on a pole or similar structure.

Pole Wall

A type of wall constructed of a series of vertical wood poles.

Pole-platform Construction

A pole foundation structure in which the tops of the poles extend above the surface of the ground and support a platform;this platform acts as the base for a building superstructure.

Polish

In plastering,to give a sheen or gloss to the finish coat.

Polished Finish

In stonework,a finish so smooth that it forms a reflecting surface;usually obtained by chemical treatment and prolonged mechanical buffing of a stone surface on which there are no voids.

Polished Plate Glass

Plate glass that has been ground and polished on both sides.

Polished Work

Stonework that has been polished to a mirror like finish with an abrasive. 

Poll

The broad end or striking face of a hammer.

Polyamide

A polymer;the most widely known in this group is nylon.

Polychromy

The practice of decorating architectural elements,sculpture,etc.in a variety of colors.

Polyethylene

A thermoplastic material often used in electrical insulation or in sheet form for dampproofing.

Polyfoil

Same as multifoil.

Polygonal Masonry

Masonry which is constructed of stones having smooth polygonal faces.

Polymer Concrete

Concrete in which an organic polymer is used as the binder.

Polymerization

A chemical reaction in which the molecular weight of the molecules formed is a multiple of that of the original substances.

Polypropylene

A plastic polymer of propylene;a tough material having good resistance to heat and chemical action.

Polystyle

Composed of many columns. 

Polystyrene Foam

See foamed polystyrene. 

Polystyrene Resin

A  synthetic resin which is formed by the polymerization of styrene upon heating;uses include paint for concrete.
 

Polysulfide Rubber

A synthetic polymer that is resistant to light,oils,and solvents;particularly useful as a sealant.

Polythene

Same as polyethylene.

Pommel,pomel

A rounded finial.

Pony Wall

Same as dwarf wall.

Pool

See swimming pool.

Poor Lime

Lime containing a significant proportion of material that is insoluble in acids;not a pure lime.
 

Pop-up Rod

A metal rod on a washbasin which controls the raising and lowering of the drain stopper.

PORC

On drawings,abbr.for “porcelain.”

Porcelain

A glazed or unglazed vitreous ceramic whiteware used for electrical,chemical,mechanical,structural,or thermal components.

Psi

Abbr.for “pounds per square inch.

Psia

Abbr.for “pounds per square inch absolute.”

Psychrograph

A self recording psychrometer,providing simultaneous readings of dry bulb and wet bulb thermometers.

Psychrometer

An instrument used to measure humidity in the atmosphere from two thermometers which are similar except that the bulb of one is kept wet,the bulb of the other being dry.

Psychrometric Chart

A chart showing the relationship between dewpoint temperature,drybulb temperature,wet bulb temperature,humidity ratio,and relative humidity.

Psychrometry

The study of moist air.

PT

1.On drawings,abbr.for “part.”2.On drawings,abbr.for “point.”

Pteroma

In Classical architecture,the enclosed space of a portico,peristyle,or stoa,generally behind a screen of columns.

Pteron

1.In a Classical temple,the passage way between the walls of the cella and the columns of the peristyle.2.The side of a Classical temple or the row of columns along one side of the temple.

PTN

On drawings,abbr.for partition.

Public Area

Any area which is free and open to the general public at all times.

Public Conveniences

Facilities for public use,such as drinking fountains,restrooms,telephones,and internet connections.

Public Corridor

A corridor or enclosed passageway connecting a room or suite with a stairway,fire tower,or other designated exit,but intended to serve only the occupants of the floor on which it is located.

Public Garage

Garage for temporary parking or storage of motor vehicles.Usually excludes repair and maintenance of such vehicles.

Public Hall

A hall,corridor,or passageway within a building but outside all apartments or suites of private rooms.

Public House

Same as tavern.

Public Housing

Low cost housing,owned,sponsored,or administered by a municipal or other governmental agency.

Public Liability Insurance

Insurance covering liability of the insured for negligent acts resulting in bodily injury,disease,or death of others than employees of the insured,and/or property damage.

Public Nuisance

See nuisance.

Public Sewer

A common sewer directly controlled by the public authority.

Public Space

1.An area within a building to which there is free access by the public,such as a foyer or lobby.2.In some codes,an area or piece of land legally designated for public use.

Public System

A water or sewerage system which is owned and operated by a local governmental authority or by a local utility company controlled by a governmental authority.