In order to prevent rainwater flooding of the property and the associated property damage, rainwater drainage should be planned via a linear drainage system. This applies to any property, especially with a large area of impermeable surface (concrete, paving stones). For flat surfaces such as pavements and driveways, linear drainage is most commonly used.
Linear property drainage - mode of operation
External linear drainage most often consists of a channel and a grate protecting it. Its primary purpose is to intercept rainwater and discharge it into sewers, underground reservoirs, drainage ditches, absorption wells or drainage systems. When locating linear drainage channels, the relief of the terrain should be taken into account. Linear dewatering will work best in depressions in the terrain, draining runoff into them and preventing it from backing up.
The gutters can be made of:
- polymer concrete (a mixture of resin, granular quartz and concrete) - providing durability, resistance to chemicals and low temperatures,
- concrete - such gutters are much heavier than polymer concrete, but also more resistant to pressure, e.g. a concrete gutter Betomax with grate D400,
- plastics (PE, PP, PVC), e.g. gutter PP A15 - providing low weight for easy transport and uncomplicated assembly.
The gutters are connected to each other at an appropriate gradient so that the rainwater drains away by gravity in the desired direction.
How to choose a linear drain
There are several selection criteria to consider when choosing a linear drainage system:
1. strength class of the linear drainage system
The most important technical criterion to start with when selecting a gutter is its strength class. The strength class is a standardised indicator of the static pressure resistance of a material, from which the permissible applications of the products are derived.
We offer linear drainage channel systems in the following strength classes:
- Class A15 - This is the lowest strength class on the scale. Class A15 products are safe for use on roads and pavements with pedestrian and cycle traffic. NOTE: Class A15 does not include vehicle traffic. When using Class A15 products in areas where there is vehicle traffic such as garages, driveways and car parks, you risk damaging the product and voiding the manufacturer's warranty.
- Class B125 - are products for individual building applications, e.g. in garages, gardens, parks.
- Class C250 - includes products designed for low-volume passenger vehicle traffic. Products in this class are ideal for driveways, car parks and garages.
- Class D400 - The products are designed for use in heavily trafficked roadways, car parks or manoeuvring areas where heavy traffic takes place.
Concrete gutter - the most robust
2. height of linear drainage troughs
The height of the channel in a linear drainage system is influenced by two factors: the capacity of the channel and the way it is installed. In most cases, the height of the channel links directly to its capacity and the deeper the channel, the higher the maximum capacity. However, in certain situations, especially in works carried out on existing car parks and driveways, it is not always possible to install a channel with a standard height. If the insertion of the channel involves digging a groove in which to install it in concrete or asphalt, or if it is not possible to excavate to the required depth, flattened channels are used (e.g. 'T' channels). Linear dewatering gutter with PP grid A15 1000x130x55 mm ). Such gutters allow the installation of a linear drainage system even if the available installation depth is small.
3. Aesthetics and material of the grates
As the grates of linear drainage gutters are visible on the surface of pavements or driveways, their colour and material of construction should be considered. The most robust gutters we offer have grates made of cast iron, but in the case of class A15 gutters there is a choice between galvanised steel grates and black polypropylene grates. All of the gratings we offer are protected against corrosion. An additional advantage of plastic grates is that they are resistant to chemicals that can damage metal grates.
Example of a trough in black PP
Connection of the linear dewatering unit to the rainwater collector
In order for a linear drainage system to work popranie, it must be connected to a rainwater collector.
The receiver function can be:
- Green areas below the surface where the linear drain has been installed
- Rainwater and combined sewer systems
- Drainage and drainage systems
We can drain water from the linear drainage troughs using:
- Side spigot - (or channel end with spigot). In the case of side branches, there are side branches or spigots as part of the channel end. Usually, the spigot needs to be opened with a hole saw or other tool. This is done before connecting it to the sewer pipes leading to the receiver.
- Lower spigot - Each trough also has the option of draining rainwater downwards. In some cases, it is necessary to purchase additional components to channel rainwater in this direction. In the case of concrete troughs, special troughs with an outlet must be selected. If you choose plastic troughs, you may need to purchase mounting stubs to connect the sewer pipe to the bottom of the trough.
- From the yard manhole - Another option is to use a yard manhole. Yard manholes can be combined with a linear drainage system as an intermediate connection to the rainwater collector. The yard manhole requires installation at a greater depth than gutters, but its use provides additional advantages. The sump provides additional volume to the system to intercept heavy rainfall and also helps to treat rainwater flowing into the receiver.
Linear drainage can be supplemented wipers (in the form of a box covered by a grate and connected to a drainage pipe) or a yard drain, located at the end of the channel, under a gutter or garden tap.
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