Abstract: A grating clamp is for fixing grating to a support. The grating clamp comprises: a fixing member being adapted to fix the grating to the support by bearing on top of two adjacent grating beams. The grating clamp further comprises: a first clamp member bearing against the grating and bearing against the support in a direction away from the grating; and a second clamp member bearing against the support in a direction towards the grating. A method is also for fixing a grating to a support.