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CEA UNIT 3 TERMS & DEFINITIONS

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BEAM A structural member, usually horizontal, that carries a load that is applied transverse to its length.

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COLUMN An upright structural member acting primarily in compression.

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CURTAIN WALL An exterior building wall that is supported entirely by the frame of the building, rather than being self-supporting or load bearing.

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DEAD LOAD The weight of the building or building components.

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DEFLECTION The distance a beam or structure deforms under loading, typically due to bending in a beam.

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FREE-BODY DIAGRAM A diagram used to isolate a body from its environment, showing all external constraints and forces acting upon it and all geometric measurements necessary to model the body.

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GIRDER A horizontal beam that supports other beams; a very large beam, especially one that is built up from other sections.

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LIVE LOAD The weight of movable objects such as people, furnishings, machines, vehicles, and goods in or on a building.

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LOAD BEARING WALL A structural wall that carries loads other than its own weight.

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NON-LOAD BEARING WALL A wall that does not carry vertical load other than its own weight.

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REINFORCED CONCRETE Concrete into which steel reinforcing bars have been embedded to impart tensile strength to the construction.

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SAFETY FACTOR A factor intended to compensate for uncertainties in design and analysis by reducing the theoretical strength of a member for use in design.

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SEISMIC LOAD A load on a structure caused by movement of the Earth relative to the structure during an earthquake.

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SPAN The distance between supports for a beam, girder, truss, or other horizontal structural member; to carry a load between supports.

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STRENGTH The capacity of a structure to resist the effects of loads.

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TRIBUTARY AREA The area of floor or roof representing the surface area from which an applied uniform load is assumed to transfer to a supporting structural member.

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TRIBUTARY WIDTH The width of floor or roof along the length of a beam, measured perpendicular to the beam, representing the portion of surface from which an applied uniform load is assumed to transfer to that beam.

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TRUSS An assembly of structural members joined to form a rigid framework, usually connected to form triangles.

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WIND LOAD Pressure from the wind that can cause lateral loads as well as uplift on the roof or downward pressure.

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