WELCOME TO OUR Building dictionary : Haunch to heat exchanger PROJECT
To promote your business on this page, click here to find out more!
Summary: Building dictionary to explain building jargon and terminology from A - Z.
Share and bookmark DIY Doctor
|
Building dictionary for the letter H - Page 4
Haunch
(1) A bracket built into a wall or column to support a load falling outside the wall or column, such as a hammer brace in a hammer-beam roof. (2) Either side of an arch between the crown, or centrestone, and the springing, or impost. (3) A thickening of a concrete slab to support an additional load, as under a wall.
Haunched floor
A floor slab thickened around its perimeter.
Haunched beam
A beam or similar member broadened or thickened near the supports.
Hazardous area
(1) The part of a building where highly toxic chemicals, poisons, explosives, or highly flammable substances are housed. (2) Any area containing fine dust particles subject to explosion or spontaneous combustion.
Hazardous substance
Any substance that, by virtue of its composition or capabilities, is likely to be harmful, injurious, or lethal.
Hazardous waste
A material defined by any of several statutes and regulations, usually characterized by a propensity to cause an adverse health effect to humans.
Head
(1) The top of almost anything, such as the head of a nail or a window head. (2) In roofing, a tile of normal width but only half the normal length, and used in constructing the eaves course. (3) The horizontal member across the top of a window or door between the jambs, sometimes offering structural support for construction above it. (4) The measure of the pressure of water, expressed in feet of water. One psi equals 2.31 feet of water.
Head flashing
In a masonry wall, the flashing over a projection, protrusion, or window opening.
Head jamb
The horizontal member which constitutes the doorhead or top of a door opening.
Head room
(1) The vertical distance, or space, allowable for passage, as in a room or under a doorway. (2) The space between the top of one's head and the nearest obstacle above it, as inside a vehicle. (3) The unobstructed vertical space between a stair tread and the ceiling or stairs above. (4) The distance between the top of the finished floor to the bottom of the finished ceiling.
Header
(1) A rectangular masonry unit laid across the thickness of a wall, so as to expose its end(s). (2) A lintel. (3) A member extending horizontally between two joists to support tailpieces. (4) In piping, a chamber, pipe, or conduit having several openings through which it collects or distributes material from other pipes or conduits. See also manifold. (5) The timber surrounding an area of asphaltic concrete paving.
Header course
In masonry, a course comprising only headers.
Headstone
Any principal stone in masonry construction, such as the stone');">keystone in an arch or the cornerstone of a building.
Headwall
The wall, usually of concrete or masonry, at the outlet side of a drain or culvert, serving as a retaining wall, as protection against the scouring or undermining of fill, or as a flow-diverting device.
Hearth
The floor of a fireplace and the adjacent area of fireproof material.
Hearthstone
(1) A large stone used as the floor of a fireplace. (2) Other naturally occurring or synthetic materials used to construct a hearth. (3) Figuratively, the fireside.
Heartwood
The core of a tree, which is no longer vital to the life growth of the tree and which is often darker and of a different consistency than the growing sapwood.
Heat
The form of energy inherent in the motion of atoms or molecules, measured in British thermal units, and transferred automatically (wherever temperature differences exist) from warmer to cooler bodies, areas, or elements by conduction, convection, or radiation.
Heat absorbing glass
Slightly blue-green tinted plate glass or float glass designed with the capacity to absorb 40% of the infrared solar rays and about 25% of the visible rays that pass through it. Cracking from uneven heating can occur if the glass is not exposed uniformly to sunlight.
Heat exchanger
A device designed to transfer heat between two physically separated fluids. The fluids are usually separated by the thin walls of tubing.
| BACK TO MAIN LIST |
Was this project useful?
Much more construction information is available in our bookstore. All the tools and fittings you need in the toolstore.
