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 side of a cutout, and extending neither above nor below the bearing bars.
Load Carrying Band
– A band used to transfer load between bearing bars.
Trim Band
– A band which carries no load, used primarily for appearance and closing open ends.
Bearing Bars
– Load-carrying main elements made from steel, aluminum or stainless steel, extending in the direction of the grating span
Bearing Bar Centers
– The distance center-to-center of the bearing bars.
Carriers
– 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 in rectangular gratings, or between a bent connecting bar and a bearing bar in a riveted grating.
Cross Bars
– The connecting bars which extend across the bearing bars, usually perpendicular to them. The may be bent into a corrugated or sinuous pattern and, where they intersect the bearing bars, are welded, forged or mechanically locked to them.
Pressure-Locked Grating
-Pressure-locked means bearing bars are locked in position by cross bar deformation instead of riveting or welding. Several proven methods include:
• Expansion of an extruded or drawn tubular cross bar;
• Extruded cross bar deformed or swaged between bearing bars;
• Press assembly of rectangular cross bars into slotted bearing bars.
Radially Cut Grating
– Rectangular grating which is cut into panels shaped as annular segments, for use in circular or annular areas.
Reticuline Bar
– A sinuously bent connecting bar extending between two adjacent bearing bars, alternately contacting and being riveted to each.
Rivet Centers
– The distance center-to-center of rivets along one bearing bar.
Riveted Grating
– Grating composed of straight bearing bars and bent connecting bars, which are joined at their contact points, by riveting.
Serrated Grating
– Grating which has the top surfaces of the bearing bars or cross bars, or both, notched.
Cross Bar Centers
– The distance center-to-center of the cross bars.