Step grate

a form of grate for holding fuel, in which the bars rise above one another in the manner of steps.

See also: Step

References in periodicals archive ?
Raw sewage is supplied to the expansion chamber from sewage pumping station and sewage pumping station, then after pre-treatment on the step grate, they are discharged into vertical sand traps
In a recent photo shoot for Northern Ontario Business, Macnaughton noticed the outside steel-grey staircase at the main public entrance had no contrasting strips on each step and her walking cane easily caught on the step grates.