A grating comprising a plurality of grating parts each formed by a plurality of spaced longitudinal and transverse strips intersecting one another, said grating parts being connected with one another by connecting means at least one slot being provided in the end portions of two grating strips of adjacent grating parts facing each other and being substantially in alignment with each other, each slot having a projection gripping into a slot or recess of a connecting means, which is provided with at least one slot, a locking means being provided which prevents the connecting means from moving out of the slots.
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