O

Wood which has been worked previously and is reused.

A lightweight,high strength,long chain polymeric material having very good abrasion resistance;especially used in indoor outdoor carpeting.

A natural resin containing essential oils;used in adhesives,varnishes,and various compounds.

A varnish consisting of a drying oil compounded with a hardening resin.

Same as olive knuckle hinge.

Same as olive knuckle hinge.

A paumelle hinge with knuckles forming an oval shape.

Architecture of the most ancient civilization of Mesoamerica (1500–400 B.C.) usually characterized by:a north south orientation of the ceremonial center,stepped pyramids,sloping walls,ceremonial courtyards,and platforms on which to construct temples.

A microphone which is equally sensitive in all directions.

Maintenance of machinery when condition monitoring equipment indicates that a mechanical failure is about to occur.

Same as center to center.

Decorations executed with enamel on ceramic glaze and then fired in a kiln in which heat alone,not flames,is permitted to enter.

1.Directly on the ground.2.At ground level.

In a fire protection system,a sprinkler similar in performance characteristics to a conventional sprinkler but having the additional feature of closing when the temperature drops to a preselected value.

Same as observation of the work.

Any arch struck from a single center,such as a round,segmental,or horseshoe arch.

An adhesive that sets without the addition of a catalyst or hardener.

A batch of concrete that is completely poured at a single time.Compare with two pour system.

A cottage having a one room plan,usually with a loft space above.

The earliest and simplest floor plan for a dwelling, especially used in 17th century and beyond; consisted of a single room,usually called a hall or keeping room,that served as a combination living room, dining room,kitchen,and workroom;cooking was done in a large fire place set into a massive chimney. In some regions, the front door of the house opened into a small vestibule called a porch,but in other regions, the door opened directly into the hall;access to a loft above was provided either by a staircase in the vestibule or by a ladder in the hall.Many such houses were enlarged by the addition of a second room at ground level,called the parlor,giving rise to the hall and parlor plan;the parlor served as a combination living room and sleeping room for the parents.Also see one over one, 1.
 
 

A school in which all elementary grade students were once taught in a single room.Such schools were common in sparsely populated areas before the 20th century;many had a bell at the ridge of the roof for summoning students at the start of the school day.

A connection of one structural member to a second which is not symmetrical about the component part of the member being connected.

Same as nonrenewable fuse.

In reinforced concrete,a system of steel reinforcement within a slab that is assumed to bend in one direction only.

See story and a half.

Same as three quarter Cape Cod house.

A one story house having a loft space between the ceiling of the first floor and the roof directly above;windows in the gable end walls and/or dormers provide light and ventilation in this loft space,providing the additional half story.

A representation of an electrical system by means of single lines and graphic symbols showing the major components of the system.

1.A two story cottage having two rooms,one directly over the other;usually the result of the expansion of a cottage having a one room plan by the addition of a floor above it.2.A term descriptive of a double hung window having one pane in the upper sash and one pane in the lower;see pane.

A heating system in which a centrally located heater distributes hot water serially to individual heaters in a home or office building.
 

A plumbing system in which a single pipe carries both soil and waste.

A type of framing system for floors or roofs in a concrete building;consists of a series of parallel joists which are supported by girders (perpendicular to the joists) between columns.

A rectangular reinforced concrete slab which spans a distance very much greater in one direction than the other;under these conditions,most of the load is carried on the shorter span.

A supply grille that deflects the outgoing air in one direction only.

In Russian Orthodox church architecture,a bulbous dome which terminates in a point and serves as a roof structure over a cupola or tower.

An onion dome placed on a tower whose height is large compared to its diameter;once a characteristic of Baroque church architecture in southern Germany,where one onion dome was sometimes placed atop another.

A banded,varicolored form of quartz,closely related to agate;cut into slabs,polished,and used for decorative building stone.

A granular limestone,each grain of which is more or less spherical and made up of concentric coats of carbonate of lime formed around a nucleus.

A type of limestone characterized by minute spherical calcareous particles. 

In a classical temple,a cavity which receives a roof beam.
 

The quality of being opaque,as the capacity of a paint to cover or obliterate a back ground over which it is applied.

1.In ancient Rome and Greece,an opening (as in a roof) for smoke to escape.2.In Greek architecture,a lacunar.

A hydrous form of silica containing 2 to 10% combined water;reacts with cement alkalies and may be highly detrimental as an aggregate in concrete.

A diffusing glass of milk white appearance formed by incorporating material of high refractive index in the glass to scatter light. 

A bulb in which part or all of the glass envelope has a white,highly diffuse finish.

glaze A glaze having a milky appearance.

A multicolored iridescent glass first used by the painters Louis Comfort Tiffany (1848–1933) and John La Farge (1835–1910) in the late 19th century;now often referred to as Tiffany glass.

that is principally or entirely of opal.
 

Impervious to the transmission of visible light.

A facing tile whose surface faces are covered by an inseparable fire-bonded,opaque,colored ceramic glaze of bright satin or glass finish.