Depending on where you are from, different countries have different terms for "storm drain".
Accordingly to Wikipedia, a storm drain is largely a tunnel that carry runoffs (rain) from urban areas. For a layman, it helps to think along the line of sewage system that functions beneath our cities.
In america, this is commonly known as "storm drain" or "storm sewer".
In the UK, this is typically referred to as "surface water drain" or "surface water sewer".
In Australia and New Zealand, it is also known as "stormwater drain".
And there it is, the very next time you hear someone mentioning "storm drain", "storm sewer", "surface water drain","surface water sewer" and "stormwater drain", congratulations, you know they refer to exactly the same thing.
Functions of storm drain include draining excess water (rain or storm water) and ground water from pavement, streets and carparks into rivers and streams to protect yourself from flooding.
Although round drain grate perform a amazing job of draining excess water from the urban areas, the inlets are essentially openings where left uncovered can pose a danger to pedestrians. Left uncovered, rubbish will go into the storm drains and cause choking which might eventually end up with flooding.
To make sure storm drains serve their purposes while minimizing the potential risks posed to pedestrians and to prevent choking of the drains, drain covers (gratings) are widely-used to cover the inlets (openings) of the storm drains to achieve the two purposes.
At Jonite, we concentrate on steel reinforced drain covers (gratings) that cover your storm drains while preserving the aesthetic components of the architecture around the drain covers.