Glossary of Terms
- Anchor - A device by which grating is attached to
its supports
- Band - A flat bar welded to a side or end of a
grating panel, or along the line of a cutout, and extending neither above nor
below the bearing bars
- Load-Carrying Band: A band used in a cutout,
to transfer the load from unsupported bearing bars in the cutout to the
supported bearing bars.
- Trim Band: A band which carries no load, but is
used chiefly to improve appearance.
- Bearing Bars - Load-carrying bars extending in the
direction of the grating span
- Bearing Bar Centers - The distance to the center of
the bearing bars
- Carriers (Punched Plate) - Flats 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 in a rectangular grating, or between a bent connecting bar in a
riveted grating
- Cross Rods - The connecting bars which extend across
bearing bars, perpendicular to them
- Cross Rod 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
- Finish - The coating, usually paint or galvanizing,
which is applied to the grating
- Grating - An open grid assembly of metal bars, in
which the bearing bars, running in one direction, are spaced by rigid cross
rods attached to them
- I-Bar - An extruded aluminum bearing bar having a
cross sectional shape resembling the letter "I"
- Length (span) - The dimension of a grating panel
measured parallel to the bearing bars
- 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.
Usually manufactured of a checkered plate, cast iron or aluminum abrasive
material.
- Press-locked Grating - Bearing bars are locked in
position by cross rod deformation instead of riveting or welding
- Radially Cut Grating - Rectangular grating
which is cut into panels shaped as annular segments, for use in circular or
annular areas
- Reticuline Bars - A sinuously bent connecting
bar extending between two adjacent bearing bars, alternately contacting and
being riveted to each
- Reversible Grating - Grating so constructed that it
may be installed either side up, with no difference in appearance or carrying
capacity
- Serrated Grating - Grating which has the top
surfaces of the bearing bars notched by punching
- Span of Grating - The distance between points of
grating support, or the direction of this dimension
- Straight Cut - That portion of the cut edge or
cutout of a grating which follows a straight line
- Swaged - A method of altering the cross-sectional
shape of a metal bar by pressure applied through dies
- Toeplate - A flat bar attached flat against
the outer edge of a grating or rear edge of a tread, and projection above the
top surface of grating or tread to form a lip or curb
- Tread - A piece of grating having carrier plates and
nosing attached by welding, and designed specifically to serve as a stair
tread
- Welded Grating - Grating in which the bearing bars
and cross rods are joined at their intersections by resistance welding
- Width - The overall dimension of a grating piece,
measured perpendicular to the bearing bars
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