Stravifloor Jackup-E

Jack-up floating floor using embedded bell-shaped housing

Stravifloor Jackup-E is a jack-up isolated floating floor system using moulded natural rubber within bell-shaped cast iron housings cast into concrete and jacked up after the concrete has cured, to provide the required void depth.

Once the concrete has cured, the isolated slab is raised off the structure to the required void depth. Stravifloor Jackup-E boxes allow for easy adjustment of the final floor height.

Stravifloor Jackup-E is a cost-effective solution with minimal risk of acoustic bridging between the floating floor slab and the subfloor.

Main Characteristics

  • Natural frequency: ≥ 9 Hz (elastomeric pads)
  • Product standard height: 85 mm
  • Minimum system height: 105 mm 
  • Minimum air gap: 20 mm

Benefits

  • Specifiers

    For Specifiers

    Guaranteed Acoustical Performance
    • Ensure that the floating floor is decoupled from the substrate
    • Natural rubber bearings provide a low, stable natural frequency over a wide load range, combining high dynamic stiffness with minimal deflection and low creep for long‑term performance
    • Jack-up floor with minimal openings in the floating slab
    • Possible to integrate insulation into the void to take care of standing waves within the void
    Design Flexibility & Adaptability to Architectural Constraints
    • Adaptable build-up height even after installation
    • Total build-up height is not dependent on the thickness of the bearing, allowing for high performance and low-profile floating floor systems
    Proven Performance (& Sustainability)
    • Acoustic laboratory test data available
    Easy to Specify
    • Easily integrate into project documentation and workflows with ready-to-use .dwg cross-sections, and BIM objects available online
    • Listed in external prediction tools, e.g., INSUL 
  • Installers

    For Contractors

    Reduced Installation Time and Labour Costs*
    • No formwork needed, limited number of components to be installed
    • Fast installation process

    • Comprehensive installation manuals and shop drawings

      *Installation services available by CDM Stravitec team, or at least installation supervision

    Simplified Logistics and Site Handling (and Reduced Waste or/and Reduced Error Chance)
    • Lower consumption of concrete than the majority of jack-up solutions available in the market, due to reduced minimum slab thickness (from 85 mm)
    • Colour coded metal plates within the bearings
    • Low number of components, reducing transport costs, simplifying on-site logistics, and minimising parts
    Flexibility in Construction Sequencing and Site Use
    • Control over jacking-up timing, allowing late-stage changes and better alignment with construction sequencing
    • Can take high loads before the slab is raised (e.g. used as a storage area during construction)

Acoustical Test Data

This solution has been tested under the setup shown alongside, among others. If you’re looking for official test reports, editable test data (.csv) and typical cross sections (.dwg) of this setup or results of other configurations, visit Stravi‑dB, our free online test library.

STRAVI-DB

  • Information Available to Download

A Practical Guide to Jack-Up Floor Insulation

This bulletin addresses a common misconception in jack-up floating floor design: that adding insulation within the jack-up cavity is not feasible. Through testing and practical case studies, it shows how proper insulation can enhance both airborne and impact sound performance without affecting the floor’s structural function. This guide serves as a reference for those designing and specifying jack-up floating floors.

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