Plastic drainage trays are installed in hard-surfaced channels to collect melt and rainwater and discharge them into the storm sewer. They are mounted flush with the ground and are covered with gratings that prevent branches and debris from entering the cleaning system. The device of storm water inlets of this type is made of separate elements that are tightly joined together.
Scope and device of plastic drainage trays with a grid
Drainage systems made of plastic modules are installed in country cottages, along pedestrian zones, at sports and playgrounds. The main condition is a low weight load per unit area. This is the main disadvantage of plastic trays: weight restrictions. By installing modules, buried basements are protected from flooding.
Polypropylene and polyethylene are used for the manufacture of the gutter. Fillers with a mineral base are added to their composition. This increases the resistance of the material to aggressive compounds dissolved in rainwater. The trays operate in a wide temperature range, ranging from -50 to +120 degrees. The measured length of the products is 1 m.The height varies from 6 to 79 cm, and the width from 9 to 50 cm.
The niche of the element can be U-shaped, square and rectangular. Lattices for strong adhesion to the main structure are complemented by locking mechanisms.
Types of plastic trays for water drainage
Manufacturers conditionally subdivide products into several types:
- high-strength with stiffening ribs - used in areas with moving ground and heavy traffic;
- wear-resistant - an anti-vandal coating is added;
- deepened - the passage of water increases due to the depth;
- universal - increase in cross-section due to expansion.
The latter two types have a high carrying capacity, which makes it advisable to use them in areas with increased precipitation.
The main difference between plastic stormwater inlets lies in a large assortment of standard sizes, which allows you to make the best choice without the need to dig deep trenches.
Specifications
Polypropylene trays have a melting point of 160 degrees, frost resistance is maintained up to -54 degrees, density is 889 kg / m3. The weight of the modules reaches 9-14 kg.
Polypropylene is a synthetic substance obtained from the synthesis of propene. It has increased strength and elasticity, does not absorb moisture, pushing it away from the surface, which increases the throughput of the modules. The material is resistant to most chemical compounds, non-toxic, mixes easily with dyes. The use of plastic products allows you to minimize labor and material costs, which is reflected in their cost.
Criterias of choice
The gratings bear the main load. For their manufacture, steel, cast iron and polymers are used. The strength class is measured depending on the raw material. It ranges from the A19 with a corresponding 1,500t weight load to the F900 for heavy duty vehicles.
The greatest weight up to 25 tons is easily carried by cast iron products. The strength of steel gratings depends on the manufacturing technology: cast ones have the lowest class up to 1.5 t; but welded ones can withstand 12.5 tons, so they are installed in car parks.
The grilles are of different designs: from simple slotted and cellular, to skillfully crafted braids and ornaments, which give residential quarters a unique look. The colors are chosen to match the roadway: black, gray and metallic. Colored plastic products can be ordered on request.
The type of trays is chosen depending on the strength class and the appropriateness of use. Concrete elements have the highest strength class, but their installation is unlikely to be appropriate in the country, and the plastic will quickly collapse in the production area.
Recently, new composite materials have appeared, from which storm water inlets are made. Polymer concrete elements have high strength and durability. Their weight is much lighter than concrete products. They are not afraid of temperature extremes and are inert to chemicals. Due to the smooth surface, their self-cleaning ability is increased. They are connected with each other using a sealant. The service life exceeds 30 years, and the weight loads are 25 tons. The products have a strength class from A15 to C250.
Polymer sand products are conglomerates of epoxy or polyester resins that bind quartz sand or granite fine chips. The strength of the modules is increased, and the weight of the products is lower than that of concrete. The service life is 50 years.
Installation features
At the joints of channels from storm water inlets at an angle of 90 degrees, it is necessary to provide on top of the device of plugs. The dimensions of the plastic trays can be easily adjusted on site. Their smooth inner surface allows water to flow unhindered into the cleaning system.
Installation of trays is carried out with a slope of 1 cm per linear meter. A sand cushion is poured into the dug trench, which compensates for the pressure from the water freezing under the pipeline, leading to the protrusion of the buried pipes. Before installing the trays, the bottom and walls of the trench are poured with liquid concrete to form a barrier. Experts recommend, if possible, to add gravel and crushed stone to the sand for filling in order to level the heaving. For loose soils, support elements are installed in the form of metal wire or rods.
Trays are mounted, their junction is covered with a sealant. The grates are securely fixed in order to avoid displacement and debris getting into the rainfall. The lid should be just 3-5 cm below the surface.
Advantages and disadvantages of plastic trays
- durable (50 years) and durable;
- are lightweight;
- do not require heavy forklifts for installation;
- profitable from a financial point of view.
Rain trays are laid on sidewalks, near buildings and structures, on sites and sites. They do not interfere with the work of communications. For their functioning, no special slopes are performed that supply water to storm water inlets. A surface drainage system requires a small investment. Installed flush with the ground, they do not interfere with the movement of people and vehicles.
Maintenance of plastic trays is much easier than closed-type devices.
Cost of drainage elements
A seemingly simple design requires thoughtful engineering solutions and the use of high-quality materials in long-term operation conditions.
Prices for plastic drainage trays with gratings depend on the load class and material. AQUA-TOP drainage tray with dimensions of 135mm / 100mmm class A (1.5 t) with a plastic grate will cost 500-600 rubles. a piece. In the same price category, the S'Park set of class A with the same width and height of 90 mm (weight 0.76 t) with a plastic grill. The products are popular with owners of small areas where there are no increased load requirements.
The Gidrolica Sport tray, load class A, LV-10.14.5.13.5 and dimensions L / W / H 119/28/14 with a galvanized steel grating costs 1800 rubles. The modules have increased wear resistance and a large selection of cross-sections.
Rain-receiving products are designed to protect land plots from erosion, to preserve buildings and technical structures from destruction. The most reasonable prices, from the point of view of an ordinary consumer, are plastic kits. Their cost ranges from 300 to 500 rubles.
