Structural grating has traditionally been made of steel, but composite grating is an alternative. This fibergrating is an advantage in applications where the lower weight and non-corrosive properties are ideal.
Common applications for grating are elevated platforms and walkways. The decking for these structures need to support human loads at a minimum, and additional loads depending upon application. One safety concern would be that of impact loads. Heavy loads falling onto the grating have a high potential to cause damage.
There are lots of people that believe in steel as being the strong alternative. Fiberglass can be superior.
As you can see, a drop test is performed in similar fashion on both steel and fibergrating. The fibergrating is superior to steel grating for this test.