g grating length is the external grating dimension measured in the direction of the bearing rods (this applies even in the case that the grating length is shorter than the width thereof).
Grating width
The non-bearing grating width is the external grating dimension measured in the direction of the filling rods.
Bearing rods
The bearing rods are parallel grating chords supported on both ends and used to transmit the forces induced by the grating load.
Filling rods
The filling rods are chords size