H definitions - Building Terms Dictionary

H definitions - Do you know architectual drafting or building terms starting with the letter "H"?

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Hammerhead Boom Crane:
A heavy-duty lifting device that uses a tower-mounted horizontal boom that may rotate only in a horizontal plane.
A very dense panel product,usually with at least one smooth face, made of highly compressed wood fibers.

A square piece of sheet metal with a perpendicular handle beneath, used by a plasterer to hold a small quantity of wet plaster and transfer it to a towel for application to a wall or ceiling.

lintel; band joist; a joist that supports other joists; in steel construction a beam that spans between girders; a brick or other masnory unit that is laid across two wyths with its end exposed in the face of the wall.

Head Joint:
The vertical layer of mortar between ends of masonry units.

The noncombustible floor area outside a fireplace opening.

The dead wood cells in the center region of a tree trunck.

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To join by softening or melting the edges with heat and pressing them together.

Heat of hydration:
The thermal energy given off by concrete or gypsum as it cures.

Heat-strengthened Glass:
Glass that has been strengthened by heat treatment, though not to as great an extent as temered glass.

The forcing upward of ground or buildings by the action of frost or pile driving.

High-lift GROUTING:
A method of constructing a reinforced masonry wall in which the reinforcing bars are embedded in grout in story-high increments.

A sealant that is capable of a high degree of elongation without rupture.

High-strength Bolt:
A bolt designed to connect steel members by clamping them together with sufficient force that the load is transferred between them by friction.

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The diagonal intersection of planes in a hip roof.

Hip Roof:
A roof consisting of four slopping planes that intersect to form a pyramidal or elongated pyramid shape.

Hollow Concrete Masonry:
Concrete masonry units that are manufactured with open cores, such as ordinary concrete blocks.

Hollow-core Door:
A door consisting of two face veneers seperated by an airspace, with solid wood spacers around the four edges. The face veneers are usually connected by a grid of thin spaces within the sirspace.

Holow-core slab:
A precast concrete slab element that has internal longitudinal cavities to reduce its self-weight.

A semicircular bend in the end of a reinforcing bar, made for the purpose of anchoring the end of the bar securely into the surrounding concrete.

Hopper Window:
A window whose sash pivots on an axis along or near the sill, and that opens by tilting toward the interior of the building.

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Horizontal Face:
A force whose direction of action is horizontal or nearly horizontal. ( see also LATERAL FORCE.)

Hose Test:
A standard laboratory test to determine the relative ability of an interior building assembly to stand up to water from a fire hose during a fire.

Hot-rolled Steel:
Steel formed into its final shape by passing it between rollers while it is very hot.

Hydrated Lime:
Calcium hydroxide produced by burning clacium carbonate to form calcium oxide (quick lime), then allowing the calcium oxide to combine chemically with water.

A process of combining chemically with water to form molecules or crystals that include hydroxide redicals or water of crystallization.

Hydronic Heating System:
A system that circulates warm water through convectors to heat a building.

Hydrostatic Pressure:
Pressure exerted by standing water.

Readily absorbing and retaining moisture.

Hyperbolic Paraboloid Shell:
A concrete roof structure with a saddle shape.

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