Lift slab floating floor systems that incorporate spring isolator assemblies to decouple four inch thick concrete slabs from non-isolated structural floors are used where vibration and impact are critical and of greater concern than airborne noise transmission.
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Adhere resilient interface (PPI by KNC) to all penetrations and perimeters. PPI prevents sound vibration from transferring from the isolated slab to the non-isolated structure.
Cover entire floor with bond breaker (Poly Sheeting by KNC). This ensures that the isolated slab can be lifted into place.
Place Canisters with Wooden Lid per engineered shop drawings (by KNC or KNC Representative). Caulk or tape to bond breaker, preventing concrete from leaking beneath Canister.
Install concrete reinforcement per project drawing and design specifications.
Pour concrete and allow to cure. Remove and discard wooden lid and screws.
Grease Lifting and Leveling Screws. Place Spring Assembly into cavity per engineered shop drawings. Balance Steel Lid on Leveling Screw, insert and engage (do not tighten) Lifting Screws.
Drive Lifting Screws two or three turns for each isolator in sequence until floor is raised. Trim perimeter bond breaker and remove PPI tear strip. Apply sealant in gap.
Our shop drawings include coordination of the live and dead loads, a dimensioned isolator layout with capacities, acoustical information capacities, acoustical information including deflection of individual isolators, as well as project specific and general installation guidelines for the contractors.
The timely gathering of essential information makes difference in our turnaround time. A guide for helpful information can be found here.
As isolated slabs are by their nature non-structural, they typically reside in the Architectural Plans.
Ensure that the structural slab has the proper depression to include the isolated slab as well as the airspace created after the slab is lifted. Structural slab stiffness and capacity considerations must be made relative to the activity of the floor (e.g. if the floor activity is to include the drop of heavy, a stiffer structural slab is required). The existing floor should be flat as the isolators can only mirror the floor on which they are resting. If there are seismic concerns, designing a curb capable of restraining the isolated slab will eliminate the cost of using in-slab restraints.
If your project isn’t employing a structural engineer of record, then slab design should go to an independent third party firm to avoid any potential conflict-of-interest with isolator layout. Kinetics maintains relationships with independent structural engineering firms experienced in isolated slab design who can seal the reinforcement design in all fifty states.
Kinetics selects spring capacities and isolator spacing based on many factors, including but not limited to, even deflection between adjacent isolators, (limits concrete slab stress) the type of activity that will be occurring on the isolated slab, as well as the total live and dead loads that will be on the slab. In some cases the slab may need to be raised above the room threshold, but will settle to proper height once all the loads are added.
Accommodates changes in building design for isolated slab location(s)
Based on requirements, determines need for isolated slab(s)
Made aware that depressed slabs are part of the project
Approve or Advises on depressed slab depths and locations; offer specifications
Ensures that structure has capacity/stiffness for isolated floor
As required (not-typical unless design is complex)
Approve or Mark-up KNC Drawings
Approve or Mark-up KNC Drawings
Works to obtain design information
Assist/Supervise as needed
Produce Shop Drawings (10-15 days typical)
Manufacture and ship
product (10-15 days typical)
Works with KNC local rep to provide information for shop drawings
Proven effective for intense impact applications ranging from floors for sensitive lab measuring equipment (e.g. metrology and surgical labs) to sports floors over retail/commercial spaces.
Spring isolators natural frequencies (fn) of 3.13 Hz for 1" rated deflection springs and 2.21 Hz for 2" rated deflection spring. Other rated deflection springs are available.
Factory-engineered shop drawings detail consider spacing, spring load/deflections and structural floor flatness requirements.
Rubber cap assembly protects against resonant frequencies.
In-slab or perimeter seismic restraint elements available where required.
Springs ship in ready-to-install sub-assemblies.
Castings are stocked ready to ship.