Glossary: E


E ValueThe ratio of stress to strain.
EasementA 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 TemperatureThe sensation produced by the combined effects of temperature, relative humidity, and air movement.
EfflourescenceA 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.
EffluentPartially treated liquid sewage flowing from any part of a disposal system to a place of final disposition.
Elastic DeformationThe ability of a material to return to its original position after a load has been removed.
Elastic LimitThe greatest stress a material can withstand without permanent deformation upon the release of the stress.
ElasticityThe property of a material that causes it to return to its original shape upon removal of a deforming load.
ElastomerA macromolecular material that returns to its approximate initial dimensions and shape after being subjected to substantial deformation.
ElastomericHaving the properties of an elastomer.
Electric ConductionThe ability of a material to conduct an electric current.
Electric CurrentThe movement of electrons in an electric conductor.
Electric Current, AlternatingAn electric current that reverses the direction of flow periodically.
Electric Current, DirectAn electric current that does not reverse its polarity.
Electric PowerThe rate of generating, transferring, or using electric energy. It is expressed in watts (W) and kilowatts (kW).
ElevationThe vertical distance above sea level or other known point of reference.
ElevatorA hoisting and lowering mechanism equipped with an enclosed car that moves between floors in a building.
ElongationDrawing out to a greater length when under load of expansion due to temperature increases.
Eminent DomainThe right of a government, under the police power concept, to take private property for public use.
EnamelA classification of paints that dry to a hard flat semigloss or gloss finish.
EncroachmentPart of a building or an obstruction that extends into the property of another.
Epoxy FinishA clear finish having excellent adhesion qualities, abrasion and chemical resistance, and water resistance.
Epoxy ResinA class of synthetic thermosetting resins derived from certain special types of organic chemicals.
EquilibriumThe state of being equally balanced.
Equilibrium Moisture ContentThe moisture content at which wood neither gains nor loses moisture when surrounded by air at a specified relative humidity and temperature.
Erection PlanAn assembly drawing showing where each structural steel member is located on the building frame.
ErosionThe 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.
EscalatorA continuous moving stair used to move people up and down between floors.
EvaporatorThat part of a refrigerating system in which the refrigerant is evaporated, allowing it to absorb heat from the contactin heat source.
EvergreenHaving green leaves throughout the year, as opposed to deciduous.
ExcavationThe digging or removal of earth.
Expansion JointA joint used to separate two parts of a building to allow expansion and contraction movement of the parts.
Expansive SoilClay that swells when wet and shrinks when dried.
Exposed Aggregate FinishA finished concrete surface in which a coarse aggregate is exposed to view.
Exterior Insulation and Finish SystemExterior 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.
ExtrapolateTo project tested values, assuming a continuity of an established pattern, to obtain values beyond the limit of the test results. Not necessarily reliable.
ExtrudingA process in which a billet of material is shaped into a strip having a uniform cross section by forcing the material through a die.