BEARING:
In a bolted connection, limit state of shear forces transmitted by the bolt to the connection elements.
BEARING TYPE CONNECTION:
Bolted connections where shear forces are transmitted by the bolt bearing against the connection element.
An essential vertical truss system that provides resistance to lateral forces and provides stability to the structural system
Limit state of sudden change in the geometry of the structure or any of its elements under a critical loading condition.
Nominal strength for buckling or instability limit states
Curvature fabricated into a beam or truss so as to compensate to deflection included by loads.
Exterior cover of structure
Shape manufactured by press-braking blanks sheared from sheets, cut lengths of coils or plates, or by roll forming cold- or hot-rolled coils or sheets; both forming operations being performed at ambient room temperature, that is, without manifest addition of heat such as would be required for hot forming.
Groove weld in which weld metal extends through the joint thickness, except as permitted for HSS connections
Cutout made in a structural member to remove a flange and conform to the shape of the intersecting member.
Plate added to, and parallel with, a beam or column web to increase resistance to concentrated forces.
Lateral Deflection of Structures
Length of the fillet weld that continues around a corner in the same plane
Generic term for bolts, rivets or other connecting devices
Limit state of crack initiation and growth resulting from repeated application of live loads.
Contact surface of connection elements transmitting a shear force.
Metal or allow to be added in making a welded joint.
Plate used to build up the thickness of one component.
Buckling mode in which a compression member deflects laterally without twist or change in cross-section shape.
Buckling mode in which a compression member bends and twists simultaneously without change in cross sectional shape.
Resultant of distribution of stress over a prescribed area
Connection capable of transferring moment with negligible rotation between connection members
Narrow piece of sheet steel used as a fill between the edge of a deck sheet and the flange of a girder in a composite floor system constructed using a formed steel deck.
Horizontal structural member that supports wall panels and is primarily subjected to bending under horizontal loads, such as wind load
Relatively smooth surface groove or cavity resulting from plastic deformation or removal of material.
Thickness of material through which a bolt passes
Plate, Angle or other steel shape in a lattice configuration, that connects two steel shapes together
Limit state of large deformation of a flange under a concentrated tensile force.
Limit state of buckling of a compression element within a cross section.
Limit state of local failure of web plate in the immediate vicinity of a concentrated load or reaction.
Yielding that occurs in a local area of an element.
Oxide surface coating on steel formed by the hot rolling process
Surface that has been machined flat by a mechanically guided tool to a flat, smooth condition.
Connection that transmits bending moment between connected members.
Framing system that provides resistance to lateral loads and provides stability to the structural system, primarily by shear and flexure of the framing members and their connection
Designated or Theoretical dimension, as in the tables of section properties
Inspection procedure wherein no material is destroyed and integrity of the material or component is not affected
Limit state of a beam-column bent about its major axis while lateral buckling or lateral Torsional buckling is not prevented by lateral bracing.
PARTIALLY RESTRAINED MOMENT CONNECTION:
Connection Capable Of Transferring Moment With Rotation Between Connected Members That Is Not Negligible.
PERMANENT LOAD:
Loads in which variations over time are rare or of small magnitude are permanent load. All other loads are variable loads.
POST-BUCKLING STRENGTH:
Load or force that can be carried by an element, member or frame after intial buckling has occurred.
PRE-TENSIONED JOINT:
Joint with high-strength bolts tightened to a specified minimum pretension.
REENTRANT:
In a cope or weld access hole, a cut at an abrupt change in direction in which the exposed surface is concave.
ROOT OF JOINT:
Portion of a joint t be welded where the members are closest to each other.
SAFETY FACTOR:
Factors that accounts for deviations of the actual strength from the nominal strength, deviations of the actual load from the nominal load, uncertainties in the analysis that transforms the load into a load effect, and for the manner and consequences of failure.
SHEAR BUCKLING:
Buckling mode in which a plate element, such as the web of a beam, deforms under pure shear applied in the plane of the plate.
SHIM:
Thin layer of material used to fill a space between faying or bearing surfaces.
SIMPLE CONNECTION:
Connection that transmits negligible bending moment between connected members.
SLIP:
In a bolted connection, limit state of relative motion of connected parts prior to the attainment of the available strength of the connection.
SLIP CRITICAL CONNECTION:
Bolted connection designed to resist movement by friction on the faying surface of the connection under the clamping forces of the bolts.
SNUG TIGHTENED JOINT:
Joint with the connected plies in firm contact
SPLICE:
Connection between two structural elements joined at their ends to form a single longer element.
STABILITY:
Condition reached in the loading of a structural component, frame or structure in which a slight disturbance in the loads or geometry does not produce large displacement.
STIFFENER:
Structural element, usually an angle or plate, attached to a member to distribute load, transfer shear or prevent buckling.
STRESS:
Force per unit area caused by axial force, moment, shear or torsion.
THERMALLY CUT:
Cut With Gas, Plasma or LASER
TRANSVERSE STIFFENER:
Web stiffener oriented perpendicular to the flanges, attached to the web.
TURN OF NUT MEATHOD:
Procedure whereby the specified pretension in high strength bolts is controlled by rotating the fastener component a predetermined amount after the bolt has been snug tightened.
UNFRAMED END:
The end of a member not restrained against rotation by stiffener or connection elements.
WEATHERING STEEL:
High strength, low-alloy steel that, with suitable precautions, can be used in normal atmospheric exposures (not marine) without protective paint coating
WEB BUCKLING:
Limit state of lateral instability of a web.
WEB COMPRESSION BUCKLING:
Limit state of out-of-plane compression buckling of the web due to a concentrated compression force.
WEB SIDEWAY BUCKLING:
Limit state of lateral buckling of the tension flange opposite to the location of a concentrated compression force.
WELD METAL:
Portion of a fusion weld that has been completely melted during welding, Weld metal has elements of filler and base metal melted in the weld thermal cycle.
YIELDING:
Limit state of inelastic deformation that occurs after the yield stress is reached.
BIAXIAL BENDING:
Simultaneous bending of a member about two perpendicular axes
BRITTLE FRACTURE:
Abrupt cleavage with little or no prior ductile deformation
CYCLIC LOAD:
Repeatedly applied external load that may subject the structure to fatigue
FATIGUE THRESHOLD:
Stress range at which fatigue cracking will not initiate regardless of the number of cycles of loading.
FLEXIBLE CONNECTION:
Connection permitting a portion, but not all, of the simple beam rotation of a member end
UNDERCUT:
Notch resulting from the melting and removal of base metal at the edge of a weld
COATED FAYING SURFACE:
A faying surface that has been primed and painted or protected against corrosion, except by hot-dip galvanizing
ENGNEER OF RECORD:
The party responsible for the design of the structure and for the approvals that are required in this specification
FAYING SURFACE:
The plane of contact between two plies of a joint
SNUG TIGHTENED JOINT:
A joint in which the bolts have been installed in accordance with section 8.1.. The snug tightened condition is the tightness that is attained with a few impacts of an impact wrench or the full effort of an iron worker using an ordinary spud wrench to bring the plies into firm contact.
BENDING MOMENT:
The internal load generated within a bending element whenever a pure moment is reacted, or a shear load is transferred by beam action from the point of application to distant points of reaction (or) The algebraic sum of all the moments of forces acting on one side of a section through a beam
A system of internal forces whose resultant is a force acting along the longitudinal axis of a structural member or assembly.
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