Architectural and Engineering Glossary


T And G

Abbr.for tongue and groove.


In a perforated metal pan acoustical ceiling assembly,a metal suspension member designed to support the metal pan by engaging its flanges.


A reinforced concrete beam or rolled metal shape having a cross section resembling the letter T.



Same as bevel square.


1.In precast framing,a segment of girder crossing the top of an interior column.2.The top of a shore formed with a braced horizontal member which projects on two sides,forming a T-shaped assembly.3.In plumbing,same as curb cock.


The basic floor plan of a building having the shape of a capital letter T.


A shore having a T-head, 1.


A T-shaped wrench with a handle having a socket (either fixed or removable) which fits over a nut or bolt head.


Chinese tower structure, rectangular in plan with several receding stories. Watchtower in the Han period; earlier, a hunting or pleasure tower. 


Abbr. for tongue-and groove.

T&P Valve

See temperature and pressure relief valve.


1.A small, narrow drop curtain in a theater used to mask from view a portion of the stage. 2. A tableau curtain.3.The lower end of a shingle; the visible portion of a roof shingle that remains uncovered.


A mixture of lime and water with shells, gravel, or stones; when dry, forms a mass as hard as rock; used as a building material.


In ancient Rome, a booth, shop, or stall. 


1.A decorative niche often topped with a canopy and housing a statue. 2.A church for a large Protestant congregation.

Tabernacle Frame

The frame for a door, window, or other opening that is treated as part of a complete design with columns or pilasters and an entablature.

Tabernacle Work

A highly decorated arcade with canopies and sculpture.


 A rammed earth mixed with lime and pebbles.

Tabla House

A primitive one room house of wood frame construction sheathed with vertical cypress rough hewn planks (tablas), used by early Spanish colonists in Florida in the 16th century. Typically, had a gable roof thatched with palm leaves, a hole in the roof at the ridge to permit smoke to escape from the fireplace below, and a battened door.


In Hispanic architecture and derivatives, long, square sawn timbers.


1.A tabular surface or structure. 2.A painting or design on a part of an extended surface, as a ceiling.


1.A stringcourse or other horizontal band of some size and weight; a horizontal molding on the exterior or interior face of a wall. 2.A flat surface forming a distinct feature in a wall, generally rectangular and ornamented. 3.In medieval architecture, the frontal on the face of the altar.4.A slab set horizontally and carried on supports.

Table Saw

A circular saw which is set below the surface of a table having a slot through which the saw blade protrudes.

Table Stone

Same as dolmen.

Tableau Curtain

A curtain on the stage of a theater which pulls back as it rises, creating a single festoon on each side, giving a draped effect; may function as the act curtain.

Tabled Joint

In cut stonework, a bed joint formed by a broad,shallow channel in the surface of one stone which fits a corresponding projection of the stone above or below.


1.A regularly shaped, separate panel, or a representation thereof, often bearing an inscription or image. 2.A coping stone, set flat; also called tabling.3.A plaque, often inscribed and carved, usually affixed to a wall surface or set into the surface; sometimes used to serve as a memorial or to commemorate a special event.

Tablet Flower

In Decorated Gothic architecture, a variation of the ballflower, having the form of an open flower with four petals.


Same as tablet, 2.


In ancient Roman architecture, a large open room or apartment for family records and hereditary statues; situated at the end of the atrium farthest from the main entrance.


See archivium. 


See tachymeter. 

Tachymeter, Tacheometer, Tachometer

A surveying instrument designed for use in the rapid determination of distance, direction, and difference of elevation from a single observation, using a short base which may be an integral part of the instrument.


1.A strip of metal, usually lead or copper, used as a clip to secure the edges of metal items in roof construction, such as flashings. 2.A short, sharp pointed nail. 3.The property of an adhesive that enables it to form a bond of measurable strength immediately after the adhesive and adherend are brought into contact under low pressure.4.To glue, weld, or otherwise fasten in spots rather than in a continuous line.

Tack Coat

See asphalt tack coat.

Tack Dry

Descriptive of the stage in the drying of an adhesive at which it will adhere to itself on contact, although it seems dry to the touch.

Tack Rag

A rag impregnated with a slow drying or nondrying varnish or resin; used to wipe dust, lint, and dirt from an article before it is painted. 

Tack Range

The period of time during which an adhesive remains in the tacky dry condition after application to an adherend.

Tack Rivet

A rivet, usually temporary, to hold work during riveting; not intended as a load carrying rivet.

Tack Room

A room for holding bridles, saddles, and harnesses; usually in a stable.

Tack Strip

A variant term for tackless strip.

Tack Weld

1.A weld used for holding metal parts in position temporarily. 2.One of a series of welds applied where a continuous weld is unnecessary.

Tack-free Dry

Descriptive of the stage in the drying of a paint or varnish film at which it no longer feels sticky to the touch.

Tack-free Time

The time period during which a sealant that is molded in the field remains tacky and is not yet fully serviceable.


A mechanism for shifting, raising, or lowering objects or materials, such as a rope and pulley block or an assembly of ropes and pulley blocks.

Tackless Strip

A metal strip, beneath the edge of carpeting, which is fastened to the floor, to a stair, etc.; the strip has many small hooks which point upward and slightly toward the edge; the carpeting is stretched beyond the metal strip, allowing the hooks to secure the carpet backing and hold the carpeting in place.

Tacky Dry, Tacky

1.That stage in the drying of an adhesive at which the volatile constituents have evaporated or been absorbed sufficiently so as to leave the adhesive in a desired condition of tackiness.2.That stage in the drying of a paint at which the film appears sticky when lightly touched with the finger.

Taenia, Tenia

A narrow raised band or fillet, particularly the topmost member of the Doric architrave. Also see order.

Tafy Joint

A connection between two sections of lead pipe; the straight spigot end of one sec- tion is inserted in the flared out end of the adjoining section; the joint is then sealed with solder.


1.In roofing, a sheet-metal strip which is folded over and used as a wedge for holding metallic sheeting in a masonry joint. 2.A temporary sign, usually attached to a piece of equipment or part of a structure, to warn of existing or potential hazards.