Workbench to cover raised step

I have got a simple design for you again which needs doing to cover a raised step.

I have a raised step/floor in one of my fabrication bays which is a safety concern. So to eliminate the health and safety issue I need a workbench design to cover the raised floor. I am attaching pictures of the raised step/floor (with dimensions) and pictures of the type of workbench we currently use (just as guide). For the workbench estimated dimension (2450 by1370by180) only estimate please design to suit.

Could you model the raised step/floor as part of the workbench please. The rest same as usual. Inventor Model, Fabrication drawing, flat pattern drawing, and a Bill of Material. Auto desk Inventor Software no Solidworks!!

Thanks and kind regards