Radially Cut Bar Grating Rectangular grating which is cut into panels shaped

Press-Locked A method for manufacturing grating where the bearing bars are locked in position by a specialized press fit with cross bar deformation instead of riveting or welding.

Radially Cut Bar 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.

Reversible Grating Grating so constructed that it may be installed either side up, with no difference in appearance or carrying capacity.

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 notched for slip resistance.

Span of Grating The distance between points of grating support, or the direction of this dimension. It must always be measured parallel to the bearing bars.

Straight Cut That portion of the cut edge or cutout of grating which follows a straight line.

Swage-Locked Grating manufactured by altering the cross sectional shape of a metal cross bar by applying pressure through dies.

Toeplate A flat bar attached flat against the outer edge of a grating panel or rear edge of tread, and projecting above the top surface of grating or tread to form a lip or curb.

Tread A panel of grating having carrier end 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 bars are joined at their intersections by resistance welding or conventional hand welding. A resistance weld is obtained by the heat produced by the resistance of the material to the flow of electric current causing the material to become plastic. At this point, the pressure on the cross bar is rapidly increased causing the cross bar to penetrate the bearing bar so that they are fused together.

Width The overall dimension of a grating panel, measured perpendicular to the bearing bars