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
