Spring Lift Slab Floor Mount
Need to isolate a concrete slab exposed to significant vibration and impact activities such as experienced in a fitness space, basketball court, generator room, or bowling center? Consider LSM spring isolator assemblies, a viable product solution for addressing vibration and impact, especially when noises generated by these activities are deemed more problematic than airborne noise transmission.
Tongue & Groove Wood Flooring
4" Isolated Concrete Slab
LSM with 2" Air Space (vented)
6" Structural Slab
Shredded Rubber Flooring
4" Isolated Concrete Slab
LSM with 2" Air Space (vented)
6" Structural Slab
Click on image to enlarge. Download multiple files by checking boxes next to desired files then click EXPORT.
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.
Contacting your Local Representative is a good place to start. You may find the Design Phase Timeline below helpful as an overview of typical activities.
Our shop drawings include coordination of the live and dead loads, a dimensioned isolator layout with capacities, acoustical information including loading of individual isolators (with deflection curves), as well as project specific and general installation guidelines for the contractors.
The timely gathering of essential information makes a 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.
Fabricated, made-to-spec housings permit flexible isolation system design for a range of slab thicknesses, air cavities, and applied loads. Your acoustical design team can assist you with your specific requirements.
Required deflection and corresponding natural frequency for the floor isolators can be determined using one inch (1") or two inch (2”) rated coil springs. Ask us about options for the airspace between the isolated (lifted) slab and the structural slab.
Factory-prepared shop drawings detail spacing, spring load/deflections, and structural floor flatness requirements. Our Project Coordinators and Professional Engineers are ready to assist you with your specific design questions.
Rubber cap assembly protects spring coils against resonant or “ringing” frequencies.
Based on your floor system requirements, in-slab or perimeter seismic restraint elements as well as Coulomb Dampers and other damping components are easily designed.
LSM can ship in ready-to-install sub-assemblies. For instance, canister assemblies and related accessories can ship ahead of the spring assemblies based on pour schedule requirements. Spring assemblies can follow once the slab is cured to strength and ready to be raised helping eliminate “missing parts” just when you are ready to lift.