Term | Definition |
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E Value | The ratio of stress to strain. |
Easement | A limited right, whether temporary or permanent, to use the property of another in a certain way. This may include the right of access to water, light and air, right-of-way, etc. |
EER (Energy Efficiency Ratio) | The Btu output divided by the input in watts. The higher the EER the more efficient the equipment. |
Effective Temperature | The sensation produced by the combined effects of temperature, relative humidity, and air movement. |
Efflourescence | A white soluble salt deposit on the surface of concrete and masonry, usually caused by free alkalies leached from the mortar by moisture moving through it. |
Effluent | Partially treated liquid sewage flowing from any part of a disposal system to a place of final disposition. |
Elastic Deformation | The ability of a material to return to its original position after a load has been removed. |
Elastic Limit | The greatest stress a material can withstand without permanent deformation upon the release of the stress. |
Elasticity | The property of a material that causes it to return to its original shape upon removal of a deforming load. |
Elastomer | A macromolecular material that returns to its approximate initial dimensions and shape after being subjected to substantial deformation. |
Elastomeric | Having the properties of an elastomer. |
Electric Conduction | The ability of a material to conduct an electric current. |
Electric Current | The movement of electrons in an electric conductor. |
Electric Current, Alternating | An electric current that reverses the direction of flow periodically. |
Electric Current, Direct | An electric current that does not reverse its polarity. |
Electric Power | The rate of generating, transferring, or using electric energy. It is expressed in watts (W) and kilowatts (kW). |
Elevation | The vertical distance above sea level or other known point of reference. |
Elevator | A hoisting and lowering mechanism equipped with an enclosed car that moves between floors in a building. |
Elongation | Drawing out to a greater length when under load of expansion due to temperature increases. |
Eminent Domain | The right of a government, under the police power concept, to take private property for public use. |
Enamel | A classification of paints that dry to a hard flat semigloss or gloss finish. |
Encroachment | Part of a building or an obstruction that extends into the property of another. |
Epoxy Finish | A clear finish having excellent adhesion qualities, abrasion and chemical resistance, and water resistance. |
Epoxy Resin | A class of synthetic thermosetting resins derived from certain special types of organic chemicals. |
Equilibrium | The state of being equally balanced. |
Equilibrium Moisture Content | The moisture content at which wood neither gains nor loses moisture when surrounded by air at a specified relative humidity and temperature. |
Erection Plan | An assembly drawing showing where each structural steel member is located on the building frame. |
Erosion | The process by which the surface of the earth is worn away by the action of natural elements, such as water and wind. Also referred to as Weathering. |
Escalator | A continuous moving stair used to move people up and down between floors. |
Evaporator | That part of a refrigerating system in which the refrigerant is evaporated, allowing it to absorb heat from the contactin heat source. |
Evergreen | Having green leaves throughout the year, as opposed to deciduous. |
Excavation | The digging or removal of earth. |
Expansion Joint | A joint used to separate two parts of a building to allow expansion and contraction movement of the parts. |
Expansive Soil | Clay that swells when wet and shrinks when dried. |
Exposed Aggregate Finish | A finished concrete surface in which a coarse aggregate is exposed to view. |
Exterior Insulation and Finish System | Exterior cladding assembly consisting of a polymer finish over a reinforcement adhered to foam plastic insulation that is fastened to masonry, concrete, building sheathing or directly to the structural framing. The sheathing may be cement board or gypsum sheathing. |
Extrapolate | To project tested values, assuming a continuity of an established pattern, to obtain values beyond the limit of the test results. Not necessarily reliable. |
Extruding | A process in which a billet of material is shaped into a strip having a uniform cross section by forcing the material through a die. |