The layman term for drain cover (grate) is manhole cover. Say http://zurvantechnologies.com/jonite-stone-reinforced-gratings/ cover" and images of spies/heros using the underground sewage system popping out of manhole cover in Hollywood films appear.
Historically from the time that 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 prefer to call them) have been invented out of the basic need to avoid people from falling into underground sewage and also to prevent large objects from entering the drains which cause choking which eventually could lead to flooding.
Fast forward to the modern day, the sewage system is still employed under all cities around the world. As opposed to the crude stone manhole covers the Romans used in the ancient days, today we have special steel reinforced stone gratings that provide the thousand year old function of covering the inlets of our sewage system.
More than simply a cover, check out Jonite's range of drain covers (drain gratings) here: http://www.jonite.us/products/creative-grates
Historically from the time that 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 prefer to call them) have been invented out of the basic need to avoid people from falling into underground sewage and also to prevent large objects from entering the drains which cause choking which eventually could lead to flooding.
Fast forward to the modern day, the sewage system is still employed under all cities around the world. As opposed to the crude stone manhole covers the Romans used in the ancient days, today we have special steel reinforced stone gratings that provide the thousand year old function of covering the inlets of our sewage system.
More than simply a cover, check out Jonite's range of drain covers (drain gratings) here: http://www.jonite.us/products/creative-grates
