Eave The line along the sidewall of a building formed by the intersection of the plane of the roof and the plane of the wall. Eave Height The vertical distance from finished floor to the eave. Eave Strut A structural member located at the eave of a building which supports a roof and/or wall panels. Eccentric The condition that exists when a load is applied on a line of action that does not pass through the centroid of the body it is applied to. Eccentricity The distance between a line of action of force and the centroid of the member it is applied to. Edge Angle 1) A structural angle that is connected around the edge of a joist extension or other member 2) An angle used around the sides of a floor to contain the concrete when it is being poured which is also called a Pour Stop. Edge Distance The distance from the center of a hole to the edge of a connected part. Edge Strip The width or region around the edges of a building where uplift values are higher than in the interior of the roof. Effective Depth The distance from the centroid of the top chord to the centroid of the bottom chord. Effective Length The equivalent length, KL, used in compression formulas. This method estimates the interaction effects of the total frame on a compression member by using K factors to equate the strength of a framed compression member of length L to an equivalent pin-ended member of length KL subject to axial load only. Effective Length Factor (K) The ratio between the effective length and the unbraced length of a member measured between center of gravities of the bracing members. K values are given for several idealized conditions in which joint rotation and translation are realized. Effective Moment of Inertia The moment of inertia of the cross section of a member that remains elastic when partial plastification takes place. See Moment of Inertia. Effective Width The transverse distance indicating the amount of slab that acts in conjuction with the supporting member. EJ Abbrevbation for Expansion Joint. Elastic Analysis The analysis of a member which assumes that material deformation disappears on removal of the force that produced it and the material returns to its original state. Elastic Design See Allowable Stress Design and Working Stress Design. Electrode The device through which current is conducted thru to the arc or base metal during the process of welding. Embedment A steel member such as a plate, bolt, stud, or bar cast into a concrete structure which is used to transmit applied loads to the concrete. End Bay The bay which is located from the end of a building to the first interior main frame. End Diagonal or Web The first web member on either end of a joist or joist girder which begins at the top chord at the seat and ends at the first bottom chord panel point. End Distance The horizontal distance from the first top chord panel point at the end of a joist to the first bottom chord panel point. End Lap The lap at the end of a sheet of deck which bears over the primary support (joist or beam). End Moment A moment which is generated at one end or both ends of a joist, joist girder, or beam due to continuous frame action which can be caused by wind, live load, or dead load moment. End Panel The distance from the panel point at thejoist seat to the first top chord panel point towards the interior. End Wall An exterior wall which is perpendicular to the ridge of the building. Envelope A graphical plot indicating the maximum magnitude of an internal force effect such as flexual stess, shear stress, axial stress, torsional stress, etc. due to a series of load combinations. EOD Abbreviation for Edge of Deck. EOJ Abbreviation for Edge of Joist. EOS Abbreviation for Edge of Slab. Equations of Equilibrium The equations relating a state of static equilibrium of a member or structure when the resultant of all forces and moments are equal to zero. Three equations must be fulfilled simultaneously: Sum of the forces in the X-direction must equal zero, sum of the forces in the Y-direction must equal zero, and the sum of the moments about any point must equal zero for a two dimensional structure. Equivalent Uniform Load A uniform load (in plf) derived from the maximum reaction (in lbs) or the maximum moment (in inch-lbs) of a member carrying various loads. Formula: Weq= 2 * max. reaction (in lbs) divided by length (in feet) or Weq=(8 * max. moment) divided by (lenght^2 (in feet) * 12) Erection The process of installing joists, joist girders, beams, bridging, deck, or other structural members in order to construct a structure. Erection Plan Floor or roof plans that identify individual marks, components, and accessories furnished by the joist manufactures in a detailed mannner to permit proper erection of the joist and joist girders. See Framing Plan and Placing Plan. Erector The person or company that actually does the erecting of the joist or joist girders for a job. Expansion Joint A break in construction or a special design detail to allow for thermal expansion and contraction of the materials of a structure. Extended End The extended part of a joist top chord with also the seat angles extended from the end of the jost extension back into the joist maintaining the standard 2 1/2 inch end bearing depth over the entire length of the extension.
Posted on: Mon, 02 Dec 2013 17:19:47 +0000
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