Polluted water diffusion prevention boom

OK Silt Fence

Outline

OK Silt Fence is a wide variety of booms do not diffuse polluted water during river or harbor construction.

OK Silt Fences prevent the diffusion of polluted water generated in civil engineering work at harbors, coasts, rivers, lakes, etc. and minimize the impact on the environment. Polyester skirts prevent the diffusion of silt (fine soil particles) that cause water pollution. There are sales and rentals, and you can choose according to the period of use.

Characteristics

OK Silt Fence fixed system suspended type

This is the most often used boom type, which is actively utilized for preventing pollution diffusion during harbor, coastline and river construction work. It is possible to select the float shapes and diameters according to the usage environment. The floats are covered with high-strength PVC tarpaulin, and a higher level of strength and durability is realized by using reinforcing belts having a low expansion and contraction ratio, reliable sewing technology, etc.

Main installation locations: Harbors, coastlines, rivers, lakes and marshes during revetment and facility construction work

In the arrangement of the floats, there are connected float types which have continuity providing a moderate wave-absorbing ability, and non-connected float types which use “openings” to disperse and reduce the pressure from tidal currents.

Skirt connection method Integrated type and separated type

OK Silt Fence fixed system self-standing type

The skirt is fixed to H-section steel on the bottom of the sea, and supports itself under the water. These booms are mainly used in civil engineering construction work at depths of 15m or greater to prevent the diffusion of pollution generated close to the sea bed. By using in combination with suspended type booms, a higher pollution diffusion prevention effect is obtained.

Main installation locations: Large harbors with water depths greater than 15m, etc.

Example of a combined installation of a fixed system self-supporting type fence and fixed system suspended type fence

OK Silt Fence float-and-sink system suspended type

By inflating and releasing the air in the rubber floats, it is possible to float and submerge the boom in a short period of time. Not only does this allow the entry and exit of construction vessels, but it protects the boom from damage by allowing it to be submerged during bad weather conditions such as typhoons.

Main installation locations: Harbors and coastlines where there is frequent entry and exit of construction vessels

Float-and-sink system suspended type

OK Silt Fence grab frame type

These silt booms are specialized for use with grab vessels utilized in dredging construction work. In addition to preventing pollution diffusion while moving the sites even for construction work extending over large areas, the booms will be effective for scouring prevention if the booms are installed around jetties or pier foundations.

Main installation locations: In harbors, coastlines, rivers, lakes and marshes, jetties, pier foundations, etc. during dredging or riprap construction work

OK Silt Fence Rental Service Information

For pollution diffusion prevention during short-period construction work, the OK Silt Fence rental service can be used.

For customers who only require the use of OK Silt Fences for a fixed construction period, MAEDAKOSEN is offering a rental service relating to the products described below. Not only does this enable limiting of the total cost compared to the case of purchasing the product, but the trouble of maintaining and administering the product after use will not be required.

  • *In principle, rental products will be delivered on vehicles. Cranes, etc. should be arranged separately.
  • *In cases such as when installation or removal work or mooring materials are necessary, separate estimates will be provided
  • Product number, Skirt, Float, Standard (No.), Material, Shape, Diameter (mm), Material, Polyester, Unconnected type, Connected type, Expanded polystyrene
Product No. Skirt Float
Standard
(No.)
Material Shape Diameter
(mm)
Material
OKS-300 300 Polyester Unconnected type ø300 Expanded polystyrene
OKS-300B 300 Connected type ø300
500
OKS-400 500 ø400
800

Click here for supplementary materials

Standard / specification

OK Silt Fence fixed system suspended type

Product No. Skirt Floats
Standard
(No.)
Tensile strength(N/3cm) Material

Shape

Diameter
(mm)
Material
OKS-300 300 3,040 or more Polyester Unconnected
float type
ø300 Expanded polystyrene
OKS-300B 300 3,040 or more Connected
float type
ø300
500 5,490 or more
OKS-400 500 5,490 or more ø400
800 8,340 or more
OKS-600 500 5,490 or more ø600
800 8,340 or more
Product No. Skirt Float cover
Standard
(No.)
Thickness
(mm)
Tensile strength
(N/3cm)
Material
OKS-300 300 0.7 to 0.9 1,350 to 1,961 or more PVC
tarpaulin
OKS-300B 300 0.7 to 0.9 1,350 to 1,961 or more
500 0.7 to 1.0 1,350 to 2,941 or more
OKS-400 500 0.7 to 1.0 1,350 to 2,941 or more
800 0.7 to 1.0 1,350 to 2,941  or more
OKS-600 500 0.7 to 1.0 1,350 to 2,941 or more
800
Product No. Connecting parts and Anchor connecting parts
(D-ring metal parts)
Tension belt
Diameter
(mm)
Tensile strength
(kN)
Thickness x width
(mm)
Tensile strength
(kN)
Material
OKS-300 Φ12 44.1 or more 3×50 47.0 or more×2strands
(Both sides)
Polyester
OKS-300B Φ19 100.0 or more 3×100 117.6 or more×2strands
(Both sides)
OKS-400 Φ19 100.0 or more 3×100 117.6 or more×2strands
(Both sides)
OKS-600 Φ25 or Φ30 176.5 or more 3×150 176.5 or more×2strands
(Both sides)
  • * An intermediate float type (OKS-300M-600M) is also available, which prevents damage to the stretched part without sagging at low tide by the action of the pressure-resistant float in the middle of the skirt.
  • * Custom-made type with higher strength (OKS-600 custom-made type, 1-point mooring method, OKS-600-800 custom-made type, 2-point mooring method) is also available.
  • * We can also respond to customer’s requesting specification and standard.

OK Silt Fence fixed system suspended type

Product No. Skirt Float
Standard
(No.)
Tensile strength
(N/3cm)
Material Diameter
(mm)
Material Cover material
(mm)
OKS-300H 300 3,040 or more Polyester ø300 Expanded polystyrene PVC
tarpaulin 0.9
Product No.

Connecting parts and Anchor connecting parts
(D-ring metal parts)

Tension belt
Diameter
(mm)
Tensile strength
(kN)
Tensile strength
(kN)
Material
OKS-300H ø12 to 19 44.1or more to 100.0 or more 50 to 117.6×2strands
(Both sides)
Polyester

OK Silt Fence float-and-sink system suspended type

Product No. Skirt Float Tension part
Standard
(No.)
Tensile strength
(N/3cm)
Material Diameter
(mm)
Material Tensile strength
(kN)
Material
OKS-400SI 500 5,490 or more Polyester ø400 Synthetic rubber 100.0 or more Synthetic rubber
800 8,340 or more
OKS-600SI 500 5,490 or more ø600 200.0 or more
800 8,340 or more
  • * OK Silt Fence float-and-sink system suspended type will only be made when receiving order.

OK Silt Fence grab frame type

Product
No.
Skirt Connecting parts and
Anchor connecting parts
(D-ring metal parts)
Reinforcing belts
Standard
(No.)
Tensile strength
(N/3cm)
Material Diameter
(mm)
Tensile strength
(kN)
Material
OKS-G 300 to 800 3,040 or more
to 8,340 or more
polyester ø12 30 to 60×
2 strands
(Bothsides)
polyester
OKS-Pi
  • * OKS-G is for grab frame, OKS-Pi is for pier
  • * OK Silt fence grab formwork is a made-to-order product.

Related products / construction methods

/ / /