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Ecomerchant AquaCrate Attenuation & Soak-away Crate 20 tonne to 50 tonnes loading capacity

Ecomerchant AquaCrate Attenuation & Soak-away Crate 20 tonne to 50 tonnes loading capacity

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Ecomerchant Aquacrate water management system is made from100% recycled Polypropylene can be assembled to form large structures and is suitable for installations beneath drives and car parks. Ideal in amenity areas, for emergency access and other load bearing trafficked areas, Ecomerchant Aquacrate is able to take normal traffic loading

Ecomerchant Aquacrate is designed for the storage (attenuation) of stormwater in both attenuation and infiltration schemes. Buried 0.5m below the surface connections of any diameter can be made to the system. Ecomerchant Aquacrate is a geocellular high-quality synthetic rectangular box. The standard loading capacity of 400 kN/m2 is sufficient for most situations.

Each crate is 1,000mm(W) x 1,000mm(L) x 400mm (H)

There are 6 crates per pallet which equates to 2.4m3 per pallet each crate has a storage capacity of 400 litres (95.5% void ratio).

Price is per crate

For ultimate peace of mind call us for an installed price - our approved installers can install anywhere in the UK:  price includes all materials, delivery, installation, on site testing and Certificate of Conformity. 

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Made in the UK

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The Ecomerchant AquaCrate storage tank has been designed specifically to meet the needs of sustainable construction as advocated by the UK Government and provides the means for rainwater collected from roofs and pavements to be infiltrated into the soil. The infiltration of relatively clean water directly into the soil alleviates pressure on the sewage system and drying out of the sub-surface can be prevented.

Ecomerchant AquaCrate is an extremely strong modular water-permeable polypropylene unit with a large storage capacity. With each unit capable of holding 160 litres Ecomerchant AquaCrate is ideal for the rapid construction of large storage capacities whilst retaining the flexibility required by many schemes. Installed units are capable of withstanding very high loadings making it the ideal choice for retaining stormwater for SUDS applications.

The Principle

These underground storage units are wrapped in an 180gsm non- woven, needle punched geotextile to allow water discharge to the subsurface, but may not allow any soil or sand particles to go through. The box has a high bearing capacity and can easily be expanded in all directions.

For permeable infiltration schemes, AquaCrate units should be wrapped in a non-woven needle punched geotextile which allows water discharge through the subsurface whilst preventing the ingress of soil or sand particles. For water storage, a impermeable geo-membrane is used between the geotextile and the crate assembly

Why use Ecomerchant AquaCrate?

  • Prevents extreme peak flows to main drainage and water purification systems;
  • Rainwater is “cleaned” by geotextile surround;
  • Decreases inconvenience of flooding during heavy rain falls;
  • Promotes the balance in the groundwater position;
  • Decreases environment problems caused by development.

PRODUCT DATA

 AQUACRATE

Nominal Size

1,000mm(W) x 1,000mm(L) x 400mm (H)

Coverage Rate

2.5 crates per m3

Capacity (per crate)

250 Litres

Unit Weight

 AquaCrate 400 -  16Kg

 AquaCrate 410 -  17Kg

 AquaCrate 414 -  20.1Kg

 AquaCrate 440 -  22Kg

Void Ratio

 AquaCrate 400 -  95.5%

 AquaCrate 410 -  94.5%

 AquaCrate 414 -  94.5%

 AquaCrate 440 -  94.2 %

Compressive Strength

 AquaCrate 400 -  >200kN/m^2  

 AquaCrate 410 -  >300kN/m^2

 AquaCrate 414 -  >300kN/m^2 + lateral strength >100kN/m^2

 AquaCrate 440 -  >500kN/m^2

The above data indicates typical values – comprehensive independent physical test data on the structural and hydraulic properties of the system is available on request.

Ecomerchant AquaCrate is ideal for bulk storage of stormwater in both attenuation and infiltration schemes. Buried 0.5m below the surface connections of any diameter can be made to the system. Ideal in amenity areas and even under car parks and other load bearing areas, the new Ecomerchant AquaCrate is able to take normal traffic loading.

Design

Following assessment of the required water to be stored (see CIRIA C522, R156 & BRE 365) the total number of  AquaCrate units can be calculated using 2.5 /m3 (1000 litres). Decide on the best configuration for the characteristics of the site in question and create the "box" accordingly using the length and width dimensions allowing for a 95% void ratio.

Ecomerchant AquaCrate suitable for landscaped and car park areas as well as general duty use, as a guide units require approx 0.5m of cover in landscaped areas and 0.75m cover in vehicular areas with a 75mm sharp sand base.

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For attenuation systems: position the inflow and outflow connections level with the base of the AquaCrate structure.

For infiltration systems: position the inflow connection at the top of the AquaCrate structure.

Installation Instructions:

  1. Excavate to the required length, width and depth and level the base. Make sure that the area is enough to allow plant access around sides to compact the backfill material (500mm minimum and 750mm minimum if HGVs being used over the tank).

  2. Ensure the base is smooth and level with no sharp protrusions. Check that the slopes are cut back to a safe angle or adequately supported and that a safe access is possible to allow site personnel to enter the excavation.

  3. Inspect the base for soft spots and if any are present, excavate and replace with compacted granular fill material.

  4. Lay 75mm sharp sand bedding layer to the base of the excavation and level off. Lay the geotextile protection fleece (180g non woven, needle punched type GT1900), ensuring a minimum 150mm overlap. This is required for both attenuation and infiltration structures.

  5. Lay the geomembrane (if tank is for water storage) over the geotextile and sand bedding layer and up the sides of the excavation. Examine the geomembrane for damage and test all welds if apparent.

  6. Assemble the AquaCrate units (1m x 1m x 0.4m High) and install within the void in accordance with the installation schedule for correct positioning. Special clips are provided to join the units to prevent displacement (single clips for adjacent units (3 per unit) and double clips for all multi layer applications (1per unit).

  7. Complete the geotextile and/or geomembrane encapsulation to the sides and top of the installation, ensuring that the protection fleece (if attenuation) has sufficient to overlap by 150mm minimum. The geomembrane should be welded with double seams and inspected for damage, testing the welds as required.

  8. Connect the drainage connections to the installation using proprietary adaptors. Alternatively for infiltration systems use flange adaptors and attach them to the AquaCrate units with self tapping screws. For attenuated systems, it is recommended that all connections and air vent installations are achieved using sealed drainage connections into a preformed socket using proprietary seals “top hats” available to order. 

  9. Backfill around the installation with Type 1 or 2 sub base, compacting in 150mm layers, in accordance with the Specification for Highway Works.

  10. Place a 75mm sharp sand protection layer if required over the top of units and continue to backfill as follows:

                      For trafficked areas (car parks etc):

  •  
    • Type 1 or 2 sub base material compacted in 150mm layers in accordance with the Specification fo
    • Highway Works. Compaction equipment on top of the system not to exceed 2,300kg per sq.metre

                      For landscaped and non-trafficked areas:

  •  
    • Selected “as dug” material with a unit size no more than 75mm compacted to 90% maximum dry density.
    • Compaction equipment on top of the system not to exceed 2,300kg per sq.metre. 

        11. Finalise the pavement construction / landscaping over the Aquacrate system.

 

For attenuation systems: position the inflow and outflow connections level with the base of the AquaCrate structure.

 

For infiltration systems: position the inflow connection at the top of the AquaCrate structure.

 

Installation Instructions:

 

1.      Excavate to the required length, width and depth and level the base. Make sure that the area is enough to allow plant access around sides to compact the backfill material (500mm minimum and 750mm minimum if HGVs being used over the tank).

 

2.      Ensure the base is smooth and level with no sharp protrusions. Check that the slopes are cut back to a safe angle or adequately supported and that a safe access is possible to allow site personnel to enter the excavation.

 

3.      Inspect the base for soft spots and if any are present, excavate and replace with compacted granular fill material.

 

4.      Lay 75mm sharp sand bedding layer to the base of the excavation and level off. Lay the geotextile protection fleece (180g non woven, needle punched type GT1900), ensuring a minimum 150mm overlap. This is required for both attenuation and infiltration structures.

 

5.      Lay the geomembrane (if tank is for water storage) over the geotextile and sand bedding layer and up the sides of the excavation. Examine the geomembrane for damage and test all welds if apparent.

 

 

6.      Assemble the AquaCrate units (1m x 1m x 0.4m High) and install within the void in accordance with the installation schedule for correct positioning. Special clips are provided to join the units to prevent displacement (single clips for adjacent units (3 per unit) and double clips for all multi layer applications (1per unit).

 

7.      Complete the geotextile and/or geomembrane encapsulation to the sides and top of the installation, ensuring that the protection fleece (if attenuation) has sufficient to overlap by 150mm minimum. The geomembrane should be welded with double seams and inspected for damage, testing the welds as required.

 

8.      Connect the drainage connections to the installation using proprietary adaptors. Alternatively for infiltration systems use flange adaptors and attach them to the AquaCrate units with self tapping screws. For attenuated systems, it is recommended that all connections and air vent installations are achieved using sealed drainage connections into a preformed socket using proprietary seals “top hats” available to order.

 

9.      Backfill around the installation with Type 1 or 2 sub base, compacting in 150mm layers, in

10.  accordance with the Specification for Highway Works.

 

11.  Place a 75mm sharp sand protection layer if required over the top of units and continue to backfill as follows:

 

12.  For trafficked areas (car parks etc):

a.      Type 1 or 2 sub base material compacted in 150mm layers in accordance with the Specification for

b.      Highway Works. Compaction equipment on top of the system not to exceed 2,300kg per sq.metre.

c.       For landscaped and non-trafficked areas:

d.      Selected “as dug” material with a unit size no more than 75mm compacted to 90% maximum dry

e.      density. Compaction equipment on top of the system not to exceed 2,300kg per sq.metre.

 

13.   Finalise the pavement construction / landscaping over the Aquacrate system.

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