P definitions - Building Terms Dictionary



P definitions - Do you know architectual drafting or building terms starting with the letter "P"?

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Package fireplace:
A factory-built fireplace that is installed as a unit.

Paint:
A heavily pigmented coating applied to a surface for decorative and/or protective purposes.

Pan:
A form used to produce the cavity between joists in a one-way concrete joist system.

Panel:
A broad,thin piece of wood; a sheet of building material such as plywood or particleboard; a prefabricated building component that is broad and thin,such as a curtain wall panel, a region of truss bounded by two vertical interior members.

Panel door:
A wood door in which one or more thin panels are held by stiles and rails.

Panic hardware:
A mechanical device that opens a door automatically if pressure is exerted against the device from the interior of the building.

Parallel strand lumbr (PSL):
Manufactured wood components that are made of wood shreds oriented parallel to the long axis of each piece and bonded together with adhesive.

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Parapet:
The portion of an exterior wall that projects above the level of the roof.

Parging:
Portland cement plaster applied over masonry to make it less permeable to water.

Particleboard:
A building panel composed of small particles of wood bonded together under pressure.

Partition:
An interior nonloadingbearing wall.

Patterned glass:
Glass in which texture has been rolled during manufactue.

Paver:
a half-thickness brick used as finish flooring.

PEC:
(Pressure Equalization chamber).

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Pediment:
The gable end of a roof in classical architecture.

Pentrometer:
A device for testing the rsistance of a material to penetration,usually used t make a quick,approximate determination of its compressive strength.

Performance grade:
A rating used to indicate the relative weather resistance of a window.

Periodic kiln:
A kiln that is loaded and fired in descrete batches,as differentiated from a tunnl kiln, which is operated continuously.

Perlite:
Expanded volcanic glass.used as a lightweight agregate in conrete and plaster as an insulating fill.

Perm:
A unit of vapor permeability.

Pier:
A caisson foundation unit.

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Pilastar:
A verticle, integral stiffening rib in a masonry or concrete wall.

Pile:
A long,slender piece of material driven into the ground to act as an element of a foundation.

Pile cap:
A thick slab of reinforced concrete poured across the top of the pile cluster to act as a unit in supporting a column or grade beam.

Piledriver:
A machine for driving piles.
Pintle cap:
A metal device used to transmit compressive forces between superimposed columns in Mills construction.

Pitch:
The slope of a roof or other plane, often expressed as inches of rise per foot of run,a dark,viscous hydrocarbon distilled from coal tar, a viscous resin found or in wood.

Pitched roof:
A sloping roof.

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Pivoting window:
A window that opend by rotating around a vertical centreline.

Pliansawing:
Sawing a log into dimension lumber without regards to direction of the annual rings.

PLain slicing:
Cutting a flitch into veneers without regards to direction of the annual rings.

Planing:
Smoothing the surface of a piece of wood ,stone, or steel with a cutting blade.

Plaster:
A cementitious material,usually based on gypsum or portland cement,applied to lath or masonry in paste form,to harden into a finish surface.

Plaster of paris:
Pure calcined gypsum.

Plaster screeds:
Intermittent spots or strips of plaster used to establish the level to which a large plaster surface will be finished.

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Plasticity:
The ability to retain a shape attained by pressure deformation.

Plastics:
Synthetically produced agiant molecules.

Plate:
A broad sheet of rolled metal 1/4 inch (6.35mm) or more in thickness, a two-way concrete slab, a horizontal top or bottom member in a platform frame wall structure.

Plate girder:
A large beam made up of steel plates, sometimes in combination with steel angels, that are welded,bolted, or riveted together

Plate glass:
Glass of high optical quality produced by grinding and polishing both faces of a glass sheet.

Platform frame:
A wooden building frame composd of closely spaced members nominally 2 inches (51mm) in thickness, in which the wall members do not run past the floor framing members.

Plenum:
The space between the ceiling of a room and the structural floor above,used as a passage for ductwork,piping,and wiring.

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Plumb:
Vertical

Plumb cut:
A saw cut that produces a vertical (plumb) surface at the lower end of a sloping rafter after the rafter is in its final position.

Plumbing up:
The process of making a steel building frame vertical and square.

Ply:
A layer, as in a lyer of felt in a built-up roof membrane or a layer of veneer or veneers in plywood.

Plywood:
A wood panel composed of an odd number of layers of wood veneer bonded togeher under pressure.

Pointing:
The process of applying mortar ti=o the surface of a mortar joint after the masonry has been laid,either as a means of finishing the joint or to repair a defective joint.

Poke-through fitting:
An electrical outlet that is installed by drilling a hole through a floor,inserting the outlet from above, and bringing in the wiring from the plenum below.

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Polybutene:
A sticky,masticlike tape used to seal nonworking joints, especially beween glass and mullions.

Polycarbonate:
An extremely tough,strong, usually transparent plastic used for window and skylight glazing,loght fixture globes, door sills, and other applications.

Polyethylene:
A thermoplastic widely used in sheet form for vapor retarders,moisture barriers, and temporary construction coverings.

polymer:
A large molecule composed of many identical chemial units.

Polyproplene:
A plastic formed by the polymerization of propylene.

Polystyrene foam:
A thermoplastic foam with thermal insulating properties.

Polysulfide:
A high-range gunnable sealant.

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Polyurethane:
Any of a large group of synthetic resins and synthetic rubber compounds used in sealants,varnishes, insulating foams, and roof membranes.

Polurethane foam:
A thermosetting foam with thermal insuating properties.

Polvinyl chloride (PVC):
The thermoplastic material widely used in construction products,including plumbing pipes,floor tiles,wall coverings, and roof membranes. Called "vinyl" for short.

Portal frame:
A rigid frame,two columns and a beam attached to one another with moment connections.

Portland cement:
The gray powder used as the binder in concrete,mortar, and stucco.

Posttensioning:
The compressing of the concrete in a structural by means of tensioning high-strength steel tendons against it after the concrete has cured.

Pour:
The cast concrete; an increment of concrete casting carried out without interruption.

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Power coating:
A coating produced by applying a power consisting of thermosetting resins and pigments, adhering it to the substance by electrostatic attraction, and fusing it into a continuous film in an oven.

Powder-driven:
Inserted by a gunlike tool using energy provided by an exploding charge of gunpowder.

Predecorated gypsum board:
Gypsum board finished at the factory with a decorative layer of paint,paper, or plastic.

Preformed joint filler;
A strip of rubbery or spongelike material desighed to fit snugly into a gap between two materials.

Preformed solid tape sealant:
A sealant inserted into a joint in the form of a flexible tip of solid material.

Prehung door:
A door that is hinged to its frame in a factory or shop.

Prescriptive building code:
A set of legal regulations that mandate specific construction details and practices rather than establish performance standards.

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Pressure-equalization chamber (PEC):
The wind-pressurized cavity in a rainscreen wall.

Pressure-equalized wall designs:
Curtain wall design that utilized the rainsceen principle.

Pressure-treated lumber:
Lumber that has been impregnated with chemicals under pressure, for the purpose of retarding either decay or fire.

Prestressed concrete:
Concrete that has been pretensioned or posttensioned.

Prestressing:
Applying an initial compressive stress to a concrete structural member,either by pretensioning or by osttensioning.

Pretensioning:
The compressing of the concrete in a structural member by pouring the concrete for the member around stretched high-strength steel strands,curing the concrete, and releasing the external tensioning force on the strands.

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Prime window;
A window unit that is to be installed permanently in a building.

Priming:
Covering a surface with a coating that prepares it to accept another type of coating or a sealant.

Protected memberane roof:
A membrane roof assembly in which the thermal insulation lies above the membrane.

Punty:
A mtal rod used in working with hot glass.

Purlins:
Bams that span across the slope of a steep roof to support the roof decking.

Putty:
A simple glazing compound used to seal around a small light.

PVC:
Polyvinyl chloride.

Pyrolitic coating:
A coating applied at a very high temperature.


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