| TAENIA |
The fillet at the top of a Doric architrave. See ORDERS OF ARCHITECTURE; DORIC. |
| THUMB MOLDING |
Also known as a quirked molding. In
profile, it is part round and part elliptical. |
| TRIGLYPH |
A projecting block with three channels forming part of a Doric frieze. See ORDERS OF ARCHITECTURE; DORIC. |
| VAULT |
An arched ceiling. Prior to the coming of the steel beam, the vault of brick or stone was adopted instead of wood beams to cover a space. In the last century, a space would often be covered by several vaults sup¬ported on cast-iron beams. The illustration above shows the vault of brick and cast iron as found in the Library's basement floor, concealed by a flat plaster ceiling. |
| VAULTING |
 A method of covering space with masonry following the principle of the arch. Its great advantage prior to the use of steel and concrete was its being fire retardant and long-lasting. The illustration below shows an example of shell vaulting, which often replaced vaults of masonry. In this instance, a stucco shell is suspended by struts from beams as found on the second floor of the Jefferson Building. |
| VESTIBULE |
An anteroom, entrance hall, or foyer. |
| VOLUTE |
A spiral scroll as on an Ionic, Corinthian, or
Composite capital, or any special ornament. Also known as HELIX.
See ORDERS OF ARCHITECTURE. |
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