WELCOME TO OUR Building dictionary : Effective age to elastomer PROJECT
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Summary: Building dictionary to explain building jargon and terminology from A - Z.
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Building dictionary for the letter E - Page 3
Effective age
The estimated age of a structure based on observed physical condition determined by the degree of maintenance and repair.
Effective area
(1) The net area of an air inlet or outlet system through which air can pass. The effective area equals the free area of the device multiplied by the coefficient of discharge. (2) The cross-sectional area of a structural member, calculated to resist applied stress.
Effective depth
The depth of a beam or slab section as measured from the top of the member to the centroid of the tensile reinforcement.
Effective height
The height of a brick
Effective length
The distance between inflection points in a column when it bends.
Effective opening
The minimal cross-sectional area of the opening at the point of water supply discharge, expressed in terms of the diameter of a circle. The diameter of a circle of equivalent cross-sectional area is given in instances where the opening is not circular.
Effective span
The centre-to-centre distance between the supports of a beam, girder, or other structural member.
Effective temperature
A single-figure index reflecting the combined effects of temperature, humidity, and air movement on the sensation of warmth and/or cold felt by the human body. Numerically equivalent to the temperature of still, saturated air, which produces an identical sensation.
Efficiency
The ratio of actual performance to theoretical maximum performance.
Efflorescence
(1) A whitish powdery deposit, sometimes formed on the surface of clay bricks, caused by soluble salts in the clay being carried to the surface by moisture during drying or during kiln firing. (2) A mass of organic matter that floats on the surface of sewage. (3) A film of impure matter that forms on the surface of a body of water.
Effluent
(1) In sanitary engineering, the liquid sewage discharged as waste, as in the discharge from a septic tank. (2) Generally, the discharged gas, liquid, or dust by-product of a process.
Eggcrate louver
A louvre whose rectangular openings resemble the dividers used in some egg cartons.
Egress
An exit or means of exiting.
Ejector
(1) A pump for ejecting liquid. (2) In plumbing, a device used to pump sewage from a lower to a higher elevation.
Elastic
Refers to any material that can return to its initial state after having been deformed by an outside force.
Elastic constant
A constant or coefficient that expresses the degree to which a material possesses elasticity. In an elastic material that has been subjected to a strain below its elastic limit, the elastic constant is the ratio of the unit stress to the corresponding unit strain.
Elastic design
An analytical design method in which the design of a structural member is based on a linear stress-strain relationship that assumes that the active stresses are equal to only a fraction of the given material's limit of elasticity.
Elastic limit
The maximum amount of deforming stress a material can sustain and still return to its initial shape without having incurred any permanent deformation.
Elasticity
The ability of a material to return to its initial state after having been deformed by some outside force.
Elastomer
A term descriptive of various polymers which, after being temporarily but substantially deformed by stress, will return to their initial size and shape immediately upon the release of the stress.
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