FicWad

The layman term for drain cover (grate) is manhole cover. Say "manhole cover" and images of spies/heros making use of the underground sewage system popping out of manhole cover in Hollywood films appear.

Historically since that time Man invented the sewage system since the Roman Times to drain water and urban waste away for sanitation purposes, manhole covers (drain covers or grates as we would like to call them) have already been invented out from the basic need to stop people from falling into underground sewage and also prevent large objects from entering the drains which cause choking which eventually can lead to flooding.

Fast forward to the modern day, the sewage system is still being used under all cities all over the world. Rather than the crude stone manhole covers the Romans used in the ancient days, nowadays we have special steel reinforced stone gratings that provide the thousand year old function of covering the inlets of our sewage system.

http://www.jonite.us than merely a cover, check out Jonite's range of drain covers (drain gratings) here: http://www.jonite.us/products/creative-grates