On some of the buildings, there are open drains that serve to drain floodwater to the main drainage channel. Thus there will be no puddles in that area. The open drains require cover so that nothing falls into them. A cover that is commonly used in open drains is cast iron grating.
Cast iron grating is a drainage component made from cast iron material through a foundry or metal casting process. Grating is used to cover the open drains around the home and in a building. So that people can cross the drains and not fall into the drains.
Cast Iron Grating Specification
Design
A grating has a rectangular design with elongated holes. These holes have a function in order that the water can flow right to the drains.
Gratings do not have a frame so the installation directly placed on a concrete foundation. To reinforce the installation of grating on the concrete foundation we can use bolts. Therefore grating will not shake when the load passed.
The size of the grating commonly customized to adjust the size of the drain that will be installed with a grating. So there is no standard size because the size of each of the drains was also different.
Type of strength
1. Medium Duty
Gratings type of medium-duty able to withstand mild to moderate loads such as motorcycles, family cars, and light freight cars. The use of medium-duty gratings usually on the drains in the area of housing, office, hotels, apartment, or other areas that no heavy loads passing.
2. Heavy Duty
While gratings type of heavy-duty is designed to be able to withstand the heavy loads like container truck and airplane. This type of grating is commonly made from a ductile iron material (FCD). Ductile iron has high ductility so it is not easy to crack even though bypassed heavy loads.
Heavy-duty gratings can also be made from cast iron (FC), but with a note that grating must be thicker than medium-duty grating type.
While the use of heavy-duty gratings is in the area that heavy loads passing such as an airport and power plant.
Installation of Cast Iron Grating
Gratings are installed side by side along the drains. So that in one area requires more than one unit to cover the entire drains. While for the installation of gratings are pairing it directly on the concrete foundation of the drains. In the installation of gratings need to pay attention to several things in order to function the efficiency of gratings.
1. Notice the top of grating (a)
You have to install the top of the grating flat with the surrounding surface. It is intended that the loads can pass-run smoothly and without shock. Furthermore, an uneven installation of gratings can cause people to stumble and crash. So the flat installation of gratings can function for safety.
2. Notice the bottom of grating (b)
The bottom of the grating should stick perfectly on a concrete foundation. While the concrete foundation must have the same width and height between the right and left sides. Besides that, you should make the concrete foundation as strong as possible in order to withstand the weight of gratings and the load through it.
3. Notice the size of concrete foundation (c)
A concrete foundation should have a maximum width. That is if we can make 10 cm width of a concrete foundation, then we just make this 10 cm width of a concrete foundation. And not recommended to make the minimum width of the concrete foundation.
Furthermore, the width size of the concrete foundation can adjust the size of gratings. If gratings have a large size, the width of the concrete foundation should also be large enough. So that the concrete foundation able to withstand the grating and its pass-through loads.
Portfolio of Cast Iron Grating of Infiniferro Company
1. Tunjungan Plaza of Surabaya
Tunjungan Plaza is one of the biggest malls in Surabaya, located on street 16-18 generals Basuki Rahmat head to street Embong Malang. The project aims to offset the rapid economic growth of Surabaya city. Also, can be one of the famous icons of the city.
On the drains of this mall using drainage components such as cast iron grating. It’s using 501 units of grating to cover the drains.
2. Stadium of Balikpapan
Stadium of Balikpapan located on street Mulawarman, Batakan, East Kalimantan. This stadium is one of the most magnificent stadiums in Kalimantan. The construction of the stadium aims to provide sports facilities for people and also as a headquarter for one of the football clubs in Balikpapan.
On the drains of stadium using 173 units of cast iron gratings.
3. Underpass of Surakarta
An underpass is a traffic lane that has the shape of tunnels under the ground or under the railway line. The construction of the underpass aims to separate the highway from the railway line. So when the train pass, there is no congestion due to vehicles waiting for the train to pass.
Underpass construction decreased or ramps make it potential to waterlogging even flooding during the rainy season. So that to avoid it needs a good drainage system. While the drainage system needs covers so that the vehicles can passing without becoming stuck in the drains.
Underpass of Surakarta using 42 units of cast iron gratings.
4. Power Plant of Banten
The power plant of Banten located in Salira village, Pulo Ampel, Serang, Banten with an area of 71 hectares. The project of the Power Plant of Banten aims to help meet the needs of electricity supply in Java and Bali. Also to help PLN suppress the ratio of fuel usage. So that with the addition of power generation capacity can avoid the threat of a blackout in Java and Bali. Considering electricity consumption in these both regions are always rising every year.
On the drains in Power Plant of Banten using 300 units of cast iron gratings.
5. I Gusti Ngurah Rai International Airport of Bali
The drainage system at the airport has an important role in flight safety, especially during take-off and landing. If there are puddles of water in the runway it could cause the wheels to slip.
The drains at I Gusti Ngurah Rai International Airport using drainage components like manhole cover and grating. While gratings that used are the heavy-duty type with the amount of 387 units.