Checkerplate, also sometimes known as Diamondplate, metal with that funny
criss-cross pattern of raised sections. Checkerplate
increases traction and hence is widely used for metal
walkways, you'll see it somewhere in just about any
industrial area. Another place you'll see it is on trucks
for the side steps. Metal grills are another good option
when traction is required and allow liquids to easilly
drain. However
they tend to be difficult to clean, hence the use of
checkerplate in places were cleanliness is important such
as food processing plants.