Thursday, June 14, 2012

Water Filled Barrier for Security and to Meet NCHRP-350 Crashworthy Test Requirements for TL-1, TL-2 and TL-3

The water-cable barrier system is a plastic, water filled portable longitudinal barrier used on the National Highway System to provide positive protection in the work zone. This type of barrier has several advantages over other water filled barrier products. The high level of internal impact energy attenuation requires no externally added steel. The water-cable barrier utilizes water dispersion upon impact in combination with internal molded-in steel cables. Upon impact, the plastic container ruptures and disperses the contained water. Simultaneously, the internal steel cables provide the strength to safely catch the misguided vehicle like a net preventing vehicle intrusion into the work zone.  Our water-cable barrier system is accepted as a longitudinal barrier and as a longitudinal device and meets NCHRP-350 crashworthy test requirements for TL-1, TL-2 and TL-3. This multi accepted product eliminates the identification and mislabeling of products between barrier, device, or barricade. The water-cable barrier meets all industry needs with one product for all applications at all test level speeds. There is no need to keep variants for different speed levels, sizes, or applications in inventory.

Our water-cable filled barrier system is designed to form a series of individual sections linked together to function as a portable longitudinal barrier to keep vehicles from penetrating the linked barrier sections. This barrier provides a positive separation between vehicles on the roadway and workers in the roadside work zone.

When an impacting vehicle contacts the water-cable barrier, the water and internal molded-in steel cables act together to re-direct or bring the impacting vehicle to a controlled stop. The system utilizes water dispersion upon impact in combination with internal molded-in steel cables. Upon impact, the plastic container ruptures and disperses the contained water. Simultaneously, the internal steel cables provide the strength to safely catch the misguided vehicle like a net preventing vehicle intrusion into the work zone. All sections are orange or white and contain internal molded-in steel cables. Our water-cable barrier meets all industry needs with one product for all applications at all test level speeds. There is no need to keep variants for different speed levels, sizes, or applications in inventory.

1 comment:

  1. Water Freezing Prevention

    In freezing weather conditions, allowing the water in a water filled barrier to freeze to a solid mass of ice should not be allowed. If the temperature at the site where the water barriers are expected to be used is at or below the freezing point of water, it is recommended that an additive is used to prevent the water in the plastic container from freezing.

    Common additives used to prevent water from freezing and are currently used in work zone devices under the same category as the water filled barrier include:

    SALT (Sodium Chloride)
    20% mixture by weight
    Reduces freezing down to 0 °F [ -18° C].
    Corrosive to inadequately protected steel components (Galvanizing adequately prevents corrosion)
    Recommended- premix before filling
    Prevent spilling since solution is harmful to vegetation, soils, and wildlife.
    Draining should be done in an acceptable area.

    CALCIUM CHLORIDE
    35% mixture by weight
    Reduces Freezing down to -20 °F [-29 °C] .
    Corrosive to thin zinc plated components
    Corrosive to inadequately protected steel components (Galvanizing adequately prevents corrosion)
    High tendency to stay on road surface resulting in slick road surface.
    High level of heat created when mixing it is recommended that pre-mixing is done before filling.
    Prevent spilling since solution is harmful to vegetation, soils, and wildlife. Draining should be done in an acceptable area.

    ETHYLENE/PROPYLENE GLYCOL
    50% mixture by volume
    Reduces water freezing to 0 °F [ -18° C].
    High tendency to stay on road surface resulting in slick road surface.
    Prevent spilling since solution is harmful to vegetation, soils, and wildlife. Draining should be done in an acceptable area.
    LIQUID CMA (calcium magnesium acetate)
    25% mixture by volume
    Reduces water freezing to 0 °F [ -18° C].
    Has a low environmental impact.

    LIQUID POTASSIUM ACETATE
    60% mixture by volume
    Reduces water freezing to -20 °F [-29 °C] .
    Low corrosive characteristics and has a low environmental impact.

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