ANCHOR A device by which grating is attached to its supports.
BAND A flat bar welded to the end of a grating panel, or along the line of a cutout, and extending neither above nor below the bearing bars.
BEARING BARS Load-carrying bars made from steel strip or slit sheet or from rolled or extruded aluminum and extending in the direction of the grating span.
BEARING BAR CENTERS The distance center to center of the bearing bars.
CARRIERS / END PLATES Flats or angles which are welded to the grating panel and nosing of a stair tread and are bolted to a stair stringer to support the tread.
CLEAR OPENING The distance between faces of bearing bars.
CROSS BARS The connecting bars, made from steel strip, slit sheet, rolled bars, or from rolled or extruded aluminum, which extend across the bearing bars, usually perpendicular to them. They may be bent into a corrugated or sinuous pattern and, where they intersect the bearing bars, are welded, forged, or mechanically locked to them.
CROSS BAR CENTERS The distance center to center of the cross bars.
CURVED CUT A cutout following a curved pattern
CUTOUT An area of grating removed to clear an obstruction or to permit pipes, ducts, columns, etc. to pass through the grating.
END DIMENSION The distance from an end of grating to center of first cross rod.
FINISH The coating, usually painted or galvanized which is applied to the grating.
FLUSH TOP GRATING A type of pressure-locked grating in which the cross bars and bearing bars are in the same plane relative to the top surface of the grating.
GRATING An open grid assembly of metal bars, in which the bearing bars, running in one direction, are spaced by rigid attachment to cross bars running perpendicular to them or by bent connecting bars extending between them.
HINGED PANELS Grating panels which are hinged to their supports or to other grating parts.
I-BAR An extruded aluminum bearing bar having a cross sectional shape resembling the letter “I”.
INTERLOCKING GRATING Plank Grating – Snap Lock Plank grating with male and
female sides that lock together.
INTERSECTION AREA The point where the bearing bar and cross bar intersect or cross. In heavy duty grating with a rectangular cross bar; an intersection has four (4) sides.
LENGTH The dimension of a grating panel measured parallel to the bearing bars. Also referred to as span.
NOSING A special L-section member serving as the front or leading edge of a stair tread, or of grating at the head of a stair.
PRESSURE-LOCKED GRATING Grating in which the cross bars are mechanically locked to the bearing bars at their intersections by deforming or swaging the metal.
RADIALLY CUT GRATING Rectangular grating which is cut into panels shaped as annular segments, for use in circular or annular areas.
SERRATED GRATING Grating which has the top surfaces of the bearing bars or cross bars, or both, notched.
SKEW CUT A fabricated diagonal cut.
SPAN OF GRATING The distance between points of grating support, or the dimension of the bearing bars in this direction.
STRAIGHT CUT That portion of the cut edge or cutout of a grating which follows a straight line.
SWAGING A method of altering the cross-sectional shape of a metal bar by pressure applied through dies.
TOE / KICK PLATE A flat bar attached against the outer edge of a grating and projecting above the top surface of grating or tread to form a lip or curb.
TREAD A panel of grating having carriers and nosing attached by welding and designed specifically to serve as a stair tread.
WELDED GRATING Grating in which the bearing bars and cross bars are joined at all of their intersections by either a resistance weld or conventional hand welding.
WIDTH The overall dimension of a grating panel, measured perpendicular to the bearing bars, and in the same direction as the cross bars.
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