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Summary: Building dictionary to explain building jargon and terminology from A - Z.
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Building dictionary for the letter H - Page 6
HEPA-filtered vacuum
A vacuum device fitted with a high efficiency particulate removal system.
Herbicide
A substance that kills plants on contact.
Herringbone bond
In masonry, a type of raking bond in which a zigzag effect is created by laying rows of headers perpendicular to each other.
Herringbone work
In masonry, the zigzag pattern created by laying consecutive courses of masonry units at alternating 45� angles to the general run of the course.
Hertz
A unit of measurement of frequency equal to one cycle per second.
Hession
A strong natural fabric made from jute.
Hewn
Roughly cut, fabricated, shaped, or dressed.
High impact polystyrene
A plastic with good toughness, moderately high heat resistance, and good resistance to stress cracking.
High density polyethylene
An extensively polymerized plastic used for pipe. Polyethylene material is highly abrasion and corrosion resistant, and thereby able to handle a wide variety of slurries and abrasive materials as well as nearly all acids, caustics, salt solutions and other corrosive liquids and gases.
High gloss
Descriptive of a substantial degree of luster or of a paint which dries with a lustrous, enamel-like finish.
High rise
(1) A building having many stories and serviced by elevators. (2) A building with upper floors higher than fire department aerial ladders, usually ten or more stories. (3) Slang for a traffic-control device consisting of a barricade with stationary flagged arms positioned at 10 o'clock, 12 o'clock, and 2 o'clock and located at each end of a construction zone.
High-bay lighting
Usually an industrial lighting system having direct or semidirect luminaires located high above floor or work level.
High-build coating
A coating composed of a series of films that are thicker than those normally associated with paints (minimum 5 mls) and thinner than troweled material.
High-carbon steel
Steel having a carbon content between .6% and 1.5%.
High-density foam
Usually a type of synthetic rubber applied as a liquid foam to the back side of carpeting. When cured, the foam is an integral part of the whole.
High-early-strength concrete
Concrete containing high-early-strength cement or admixtures causing it to attain a specified strength earlier than regular concrete.
High-strength bolts
Bolts made from high-strength steel');">carbon steel or from alloy steel that has been quenched and tempered.
High-strength steel
Steel with an inherent high yield point.
High-tensile bolt (high-tension bolt)
A bolt made from steel');">high-strength steel and tightened to a specified high tension. High-tensile bolts have replaced the use of steel rivets in steel-frame construction.
Hinge
A flexible piece or a pair of plates or leaves joined by a pin so as to allow swinging motion in a single plane of one of the members to which it is attached, such as a door or gate.
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