Grating

Claim 1

Grating for covering openings, wherein grate bars are held in spaced relationship by carrier bars extending transversely of their longitudinal direction, the grate bars (5, 25) consisting of profiled rails which have a laterally directed angled portion (9) above their fastening (7, 27, 37) to the carrier bars (6, 26, 36), the angled portions (9) of all the grate bars (5, 25) extending in the same direction, the angled portion (9) of the grate bars (5, 25) adjoining a foot portion (8) at an obtuse angle, the thickness of the angled portion (9) being the same as the thickness of the foot portion (8), the part of the angled portion (9) which is directed away at an obtuse angle from the foot portion (8) being connected at an acute angle with a nose (10), the nose (10) extends at a right angle to the foot portion (8), the free end of the nose (10) being in the same plane as the lateral surface of the foot portion (8) away from which the angle portion (9) is directed, the profiled rails constituting the grate bars (5, 25) having toothings (11) on the lateral surfaces of their foot portions (8), while linking pieces (7, 27, 37) fastened (50, 51) thereto have retaining slots (13) with correspondingly matched toothings (12), the toothings (11, 12) being capable of being positively latched to one another, the toothings (11, 12) having a saw-tooth profile, each tooth having one steep flank and one gently inclined flank, the steep flanks in the retaining slots (13) being directed towards the base of the slot and those on the foot portions (8) being directed away from the end of the foot, characterized by the fact that the profiled rails constituting the grate bars (5, 25) are anchored by way of their foot portions (8) to said linking pieces (7, 27, 37) which rest positively by means of rearward retaining shoes on cut-back ledges extending longitudinally of carrier bars (6, 26, 36).