Column - a long, relatively slender, supporting pillar. A column is usually loaded axially in compression.
Beam - A horizontal structural member, such as a girder, rafter, or purlin, that transversely supports a
load and transfers the load to vertical members, such as columns and walls.
Girder - A large principal beam of steel, reinforced concrete, wood, or a combination of these, used to
support other structural members at isolated points along its length.
Joist - A piece of lumber two or four inches thick and six or more inches wide, used horizontally as a
support for a ceiling or floor. Also, such a support made from steel, aluminum, or other material.
Load- Bearing Wall - A wall specifically designed and built to support an imposed load in addition to its
own weight.
Anchor Bolt - A threaded bolt, usually embedded in a foundation, for securing a sill, framework, or
machinery.
Envelope - A term used to denote the extreme outside surface and dimensions of a building.
Wythe - Each continuous vertical section of a wall one masonry unit in thickness.
Tilt- Up - A method of concrete construction in which members are cast horizontally at a location
adjacent to their eventual position and tilted into place after removal of forms.
Metal Framing - Metal framed partitions commonly used for fire-rated construction around columns and
at beams.
, Dampproofing - An application of a water-resisting treatment or material to the surface of a concrete or
masonry wall to prevent passage or absorption of water or moisture. Can also be accomplished by using
an admixture in the concrete mix.
Air Barrier - A component of the building envelope system that prohibits air leakage into a building and
reduces the risk of condensation build up. House wrap and fluid- applied air barriers are examples.
Sheathing - Plywood, waferboard, oriented strand board, or lumber used to close up side walls, floors,
or roofs preparatory to the installation of finish materials on the surface. The sheathing grades of
lumber are also commonly used for pallets, crates, and certain industrial products.
Flashing - A thin, impervious sheet of material placed in construction to prevent water penetration or
direct the flow of water. Flashing is used especially at roof hips and valleys, roof penetrations, joints
between a roof and a vertical wall, and in masonry walls to direct the flow of water and moisture.
Vapor Barrier - Material used to prevent the passage of vapor or moisture into a structure or another
material, thus preventing condensation within them.
Bond Breaker - A material used to prevent adhesion between freshly placed concrete and the substrate.
Storefront Sash - An assembly of light metal members that form a frame for a fixed-glass storefront.
Curtain Wall - The exterior closure or skin of a building. A curtain wall is nonbearing and is not supported
by beams or girders.
Veneer - A masonry facing attached to the backup, but not so bonded as to act with it under load.
Lintel - A horizontal supporting member, installed above an opening such as a window or a door, that
serves to carry the weight of the wall above it.
Procurement and Contracting Requirements - Masterformat (2004) Division- 00
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