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Term Definition
Holding Period. In the manufacture of concrete products, the period between completion of casting and the introduction of additional heat or the steam curing period.  
Holdover Tenant. A tenant that does not vacate the property at the end of a lease term.  
Hole. 1. An opening or perforation in a material. 2. A pit in the ground.  
Holiday. 1. In roofing, a skipped area of liquid applied roofing. 2. In painting, unintentional missing of an area of surface being painted.  
Hollow Block. Concrete blocks that can be filled with insulation or reinforced and grouted.  
Hollow Clay Tile. A tile building material manufactured in a variety of sizes and forms, used for both exterior walls and partitions.  
Hollow Column. A vertical column constructed so as to create an air space within.  
Hollow Concrete Masonry. Concrete masonry units that are manufactured with open cores, such as ordinary concrete blocks.  
Hollow Core Door. A flush hardwood or plywood door glued to a skeletal framework with the interior remaining void or honeycombed.  
Hollow Core Slab. A precast concrete slab element that has internal longitudinal cavities to rce its self-weight.  
Hollow Masonry Unit. A masonry unit whose net cross-sectional area in any plane parallel to the bearing surface is less than 75% of its cross-sectional area measured in the same plane.  
Hollow Metal Door. A hollow core door constructed of sheet metal that has been channel-reinforced; the core is often filled with some type of lightweight material.  
Hollow Metal Frame. A sheet metal door frame with reinforcing at the hinges and strikes.  
Hollow Wall. A wall built of solid masonry units laid in and so constructed as to provide an air space within the wall.  
Hollow-Back. Removal of a portion of the wood on the unexposed face of a wood trim member to more properly fit any irregularity in bearing surface.  
Hollow-Core Construction. A panel construction with faces of plywood, hardboard, or similar material bonded to a framed-core assembly of wood lattice, paperboard rings, or the like, which support the facing at spaced intervals.  
Hollow-Tube Gasket. sealing device made of rubber or plastic with tubular cross-section.  
Homestead. 1. A tract of land granted by the U.S. upon recording, improving, and cultivating the property. 2. A residence. 3. A home and adjoining land occupied by a family; this can be exempt from judgment up to a certain amount by filing a Declaration of Homestead.  
Hone. A honing stone.  
Honeycomb Core. A sandwich core material, for doors or building panels, constructed of thin sheet materials or ribbons formed to honeycomblike configurations.  
Honeycomb. Voids in concrete resulting from segregation and poor consolidation at the time concrete is placed.  
Honeycombing. Checks, often not visible at the surface, that occur in the interior of a piece of wood, usually along the wood rays.  
Honing Stone. A fine-grit stone for sharpening cutting tools.  
Hood, Exhaust. see Exhaust Hood.  
Hood, Range. see Range Hood.  
Hook Knife. A special curved knife used primarily for cutting resilient floor coverings; also called a Linoleum Knife.  
Hook Stick. An implement that is curved or bent for holding, catching, or pulling.  
Hook Strip. strip of wood, plastic, or metal secured to a wall surface to provide a mounting surface for hooks, such as coat hooks or key hooks.  
Hook Wire. A hook implement that is curved or bent for holding, catching, or pulling.  
Hook. A semicircular bend in the end of a reinforcing bar to develop bond, and thus anchorage.  

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