Composition of Raised Floor for Interiors
The raised floor is a technological system composed of five main elements
• supporting structure
• surface layer
• perimetral edge
• backing layer
The combination of the horizontal and vertical parts supports the raised floor panel so it can be raised up higher than the building’s floor slab and be set level. The structure is in galvanized steel to prevent corrosion and consists of columns, crosspieces and gaskets
1 Pedestal: has a stem, base and head and is the vertical, load-bearing part.
2 Gaskets: fitted between the panels and the stringers are designed to reduce noise and provide an air seal.
3 Stringer: is the horizontal, modular part that links the columns and was designed to improve the stability and rigidity of the structure, the system’s load capacity and its overall seal.
4 Thermal/acoustic insulation: insulating panels in thermobonded polyester fibre (supplied on request)
5 Impact noise insulation: multilayer backing membrane made of reticulated polyethylene and rubber (supplied on request)
Types of Support Structure
Different types of load bearing structure are possible by combining the various parts based on the load bearing needs and the layout of services and cables. Marazzi Engineering has focused on the development of high-performance solutions that have helped it expand the variety normally available on the market:
The TKS structure (no stringer): consisting of pedestal with 8-spoke radial head, where the panels are placed directly; a plastic gasket is fitted for less noise. Since there are no stringer, the columns in this type of structure are bonded to the sub-floor slab with specific glue.
The TKL structure (with stringer): the 8-spoke radial head pedestal are shaped so the 28 x 18 mm C-section stringer can be snapped into place. The snap-fastening instantly forms a solid link between the parts and speeds up the installation. Diagonal reinforcement stringer can also be added, if necessary, thanksto the special shape of the head.
The TKM structure (with medium stringer): pedestal with 8-spoke radial heads, shaped so the 28 x 38 mm C-section load-bearing stringer can be snapped into place. Again, the head of the columns allows for the addition of diagonal reinforcement crosspieces.
The TKC Structure (with heavy, closed overhead passing stringer): the pedestal have a cross-head with screws to lock the load bearing stringer in place using pressure. The load bearing stringer, where the heads of the columns rest, have a 50 x 25 mm rectangular section and various lengths: the side frames are 1800 or 3600 mm.
Core of the Raised Floor
This is the central part of the raised floor and it can be of two basic types depending on the construction material:
• In wood and resin chipboard featuring high density and high mechanical strength, with nominal thickness of 38 mm (type L38). This material has excellent properties in terms of low weight, economy, and ease of handling; in addition, it is in the lowest formaldehyde release class (E1).
• In inert material (anhydrous calcium sulphate) reinforced with high strength cellulose fibre, with nominal thickness of 30-34 mm (type K30-K34). The physical-mechanical characteristics and absolute safety in terms of the release of volatile substances make this material the best product for raised floors.
• Marazzi Engineering also offers a third solution: the Encapsulated Panel. This type of panel (23/29 mm thickness) consists of a calcium sulphate core – reinforced with cellulose fibres or with wood and resin chipboard – encapsulated in a hot-galvanized steel sheet coating which, by means of a double fold at the edge, increases the load capacity. The encapsulated panel is a technologically advanced system with high mechanical strength. It is very light and tough and
supports self-laying floor coverings.
The upper coating applied to the core comprises the floor surface and defines the floor’s aesthetic appearance. Marazzi Engineering can supply any material for this purpose, from the most classic to the most innovative: porcelain stoneware, resilient materials (rubber, linoleum, PVC), plastic laminates, natural stone or stone composites and real wood. Porcelain stoneware is the most suitable material for the panels’ surface finish thanks to its special resistance and excellent technical characteristics. Marazzi offers the widest range of porcelain stoneware surfaces that are perfectly suitable for the creation of raised floors, including in areas with heavy traffic.
Accessories are available to interface the raised floor with its immediate surroundings and exploit its features fully.
• Indoor and outdoor ramps
• Indoor and outdoor steps
• Partition walls for sound-proofing, fire prevention or
• Front curtain walls
• Grills and perforated panels for ventilation
• Panels with grommets for electric wiring and data
• Grommet hatches
• Raised or flush outlet boxes with electric sockets or
• Expansion joints
• Suction caps for lifting the panels
• Lateral finishes with contrasting strip for connection
to the wall
• Structural Bridges