Architectural and Engineering Glossary
R
In surveying,a trial line toward a fixed terminal point which is invisible from the initial point.
A type of noise comprised of transient disturbances which occur at random times;its instantaneous magnitudes are specified only by probability distribution functions which give the fraction of the total time that the magnitude lies within a specified range.
Paving using irregularly shaped stones.
Same as random work.
Same as rubblework.
One of many shingles of uniform length,but of any width.
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One of many slate shingles installed in irregular pattern,using varying sizes.
See random work.
Boards,lumber,shingles,etc.,of nonuniform widths.
1.Random stonework.2.Masonry of rectangular stone not laid in regular courses,but broken up by the use of stones of different heights and widths,fitted closely.
1.In masonry,a row or course,as of stone.2.A line of objects in direct succession,as a range of columns.
A latrine having a number of seats.
An open metal enclosure over cooking surfaces through which air is drawn in from the surrounding spaces,entraining grease,heated air,and odors.
See coursed ashlar.
A pile which serves as a guide for locating other piles.
Same as range rod.
A wood,fiberglass,aluminum,or steel lining pole used by surveyors as a sighting rod for locating points or directions of lines in marking alignment;approx.1 in.(2.5 cm) thick and 6 to 10 ft (approx. 2 to 3 m) long;usually painted with alternate red and white bands.
A trial and error procedure for placing a surveyor’s instrument on a previously established line.
Same as rubblework.
Same as wale.
Masonry in which the stones are of equal height within each course,but all courses need not be of the same height.
In masonry,a chain bond formed by small strips of wood at the face of the wall,commonly laid in the joints,and projecting slightly to provide a nailing surface for battens,furring,etc.
Same as range rod.
Liquid asphalt composed of asphalt cement and a naphtha or gasoline type diluent of high volatility.
Same as rapid curing asphalt.
A fluorescent lamp designed for operation with a ballast having a low-voltage winding for preheating the electrodes and for initiating an arc;may be operated on preheat fluorescent circuits;does not require a starter or the use of high voltage.
A coarse file having its surface dotted with protruding pointed teeth.
In masonry wall construction,a barrier to prevent rats from burrowing down along the exterior of a foundation wall.
A modification of Flemish bond with the stretchers laid on edge.
A brace,3 with a ratchet driven chuck,permitting its use in confined spaces where complete circular sweeps of an ordinary brace would be impossible.
A hand-driven drill,1 which has a ratchet-driven chuck;used in confined spaces.
See spiral ratchet screwdriver.
Same as decay rate.
Same as growth rate.
The current that an electrical device can carry,under specified conditions,without resulting in overheating or mechanical overstress.
Of an engine or prime mover,the maximum horsepower that can be provided under normal,continuous operation.
1.The average life of a lamp of a given type,as determined from a large sample operated under laboratory conditions;the average life of a group of lamps which are operated under variable conditions may not equal the rated lamp life.2.For lamp types whose luminous output drops to a very low value before the lamps cease to operate:the time when the out put of a large sample of lamps under controlled laboratory conditions reaches a specified fraction of the initial output.
In vertical transportation,the load in pounds or kilograms which an elevator,lift,dumbwaiter,or escalator is designed to lift at its rated speed.
The speed in feet (or meters) per minute at which a device,apparatus,conveyance,elevator,etc.,is designed to operate in the upward direction with the rated load.
A primitive fort in Ireland,many of which still exist today;the defensive structure includes ramparts of stone or earth as well as some rudimentary form of housing.
The fraction by which the rated electrical load or current must be multiplied to obtain the appropriate figure to estimate the total load for design purposes.
See reduction ratio.
In fortifications,a projecting outwork forming a salient angle.
In asphalt pavement,the progressive disintegration by the dislodgement of aggregate particles,from the surface downward or from the edges inward.
An unfired brick,before it has been inserted in a kiln.
Linseed oil which has been refined but has not undergone further treatment,such as boiling,blowing,or bodying.
Untreated sewage.
1.In ice making,any water used for ice making except distilled water.2.Water,from any source,that requires treatment before it can be used,e.g.,as in steam generation.
A proprietary name for a concrete insert.
See medullary ray.
