WELCOME TO OUR Building dictionary : H moulding to hammer drill PROJECT
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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 1
H-moulding
An H-shaped trim piece used in a butt joint assembly. The two channels of the \"H\" hold the members in place.
H-pile
A type of steel beam driven into the earth by a pile driver.
Hack
(1) To cut or strike at something irregularly or carelessly, or to deal heavy blows. (2) A person who lacks, or does not apply, knowledge or skill in performing his job.
Hacking
(1) Striking a surface with a special tool so as to roughen it. (2) A style of brick-laying in which the bottom edge is set in from the plane surface of the wall. (3) In a stone wall, the breaking of a single course into two or more courses, sometimes for effect but usually because of the scarcity of larger stones.
Hacksaw
A lightweight, metal-cutting handsaw having a narrow, fine-toothed blade retained in an adjustable metal frame.
Hairline cracks
Very fine, barely visible random cracks appearing on, but not penetrating, the finish surface of materials such as paint and concrete.
Half baluster
An engaged baluster having an outward protrusion equal to approximately half its diameter.
Half bat (half brick)
A half-brick produced by cutting a brick in two, across its length.
Half header
Half of a brick or concrete block made by cutting the unit longitudinally through its faces. Half headers are used to close the work at the end of a course.
Half round
(1) Moulding having one flat side and one rounded side, making it semicircular in profile. (2) Veneer produced by slicing a flitch or log that has been sawn into two equal halves.
Half turn
Describes a stair making a 180 degree turn or two 90 degree turns at each landing.
Half-face respirator
A respirator that covers only the nose and mouth.
Half-life
The period of time that the level of radioactivity for a substance decays by 50%.
Half-round file
A file having one side in the shape of a segment of a circle and the other flat.
Halide lamp
See metal halide lamp
Hall
(1) A large room in which people assemble for entertainment or meetings. (2) A small entrance room or corridor. (3) A term often used in the proper names of public or university buildings.
Hallway
A passageway providing access to various parts of a building.
Halon fire extinguisher
A suppressing system for use on all classes of fires. Its extinguishing agent is bromotrifluoromethane, a colorless, odorless, and electrically nonconductive gas of exceptionally low toxicity. Considered to be the safest of the compressed gas fire-suppressing agents. Although often used in computer equipment rooms, the use of halon is severely restricted because of its properties (which destroy the ozone layer).
Hammer
A hand tool with a handle perpendicular to its head, for driving nails or other applications involving pounding or striking.
Hammer drill
A pneumatically powered mechanism using percussion to penetrate rock.
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