| National Institute for Occupational Safety and Health.
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| see Bushed Nipple.
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| see Offset Nipple.
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| short length of pipe with male threads on both ends.
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| National Institute of Standards & Technology.
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| Used extensively in making lacquer, is prepared from cellulose (cotton linters) by treatment with chemicals; see Cellulose Nitrate.
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| Mildly poisonous gas (NO2) often found in smog and automobile exhaust fumes.
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| The National Lumber Grades Authority.
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| Any gaseous element of a group that almost never combine with other elements, consisting of helium, neon, argon, krypton, xenon, and radon; also called the Inert Gases or the Rare Rases.
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| A concrete mixture in which only the coarse gradation (3/8 to 3/4 inch normally) of aggregate is used.
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| National Oak Flooring Manufacturers Association.
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| Low-temperature refrigerator cabinet in which no frost or ice collects on freezer surfaces or materials stored in cabinet.
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| The filling of brick between the roof rafters from the wall plate to roof boards for making the building wind tight.
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| Pipe usually manufactured of cast iron, which is fabricated without hubs and coupled together by a fastener of stainless steel and rubber.
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| A by-product in worsted yarn manufacture, consisting of short wool fibers, less than a determined length, which are combed out.
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| A relative numerical expression of the ability of a material to absorb sound.
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| 1. The rction in sound pressure level caused by making some alteration to a sound source. 2. The difference in sound pressure level measured between two adjacent rooms caused by the transmission loss of the intervening wall.
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| Any undesired sound.
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| systematic naming; the terminology of a science.
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| 1. The named size; compare with Actual Size. 2. An approximate rough cut dimension assigned to a piece of material as a convenience in referring to the piece, such as 2 by 4 or 500 pound. 3. The stated size of a piece of lumber; its actual size is smaller. 4. A dimension greater than a specified masonry unit dimension by the thickness of a mortar joint. 5. This is the approximate facial size or thickness of tile, expressed in inches or fractions of an inch, for general reference, such as a "4 by 4" tile. 6. Tubing measurement which has an inside diameter the same as iron pipe of the same stated size.
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| The named size, for example the nominal size of a wood stud is 2- by 4- inches while the actual size is less. The nominal size of a concrete block is 4- by 8- by 16-inch while the actual size is less.
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| A graphic representation consisting of three or more lines calibrated to scale and arranged so that a straightedge connecting known values on two lines will intersect unknown values on one or more other lines.
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| A truck mounted unit for transporting ready- mixed concrete short distances, not equipped to provide agitation (slow mixing) during delivery.
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| Non-automatic means that the implied action requires personal intervention for its control; see Automatic; as applied to an electric controller, non- automatic control does not necessarily imply a manual controller, but only that personal intervention is necessary.
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| In a direction not parallel to the long axis of a structural member.
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| A partition which extends from floor to ceiling but which supports no load other than its own weight.
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| A wall that carries no superimposed load; it could be removed without any structural effect on the remaining building.
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| Not carrying a load.
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| Functional refrigerating system installed where there are no local state or national refrigeration codes in force.
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| Any material which will neither ignite nor actively support combustion in air at a temperature of 1200° F. when exposed to fire.
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