Prefabricated wood elements

Roof, floor and wall elements

Kerto® LVL (laminated veneer lumber) is a perfect product to be used as a component for roof, floor and wall elements.

Pre-fabricated roof, floor and wall elements facilitates quick assembly and reduced project costs. The loadbearing structure of these composite elements typically consists of solid sections, usually allowing free spans up till ca. 9 meters for rood and floor elements. Utilizing the excellent technical performance of Kerto® LVL in the loadbearing structure will result in lesser material spend, lower weight, stronger and more stable elements and even enables longer spans.

Roof and floor elements for longer spans

Kerto-Ripa® is an enhanced design system for roof- and floor elements, developed by Metsä Wood. Based on Kerto® LVL  S-beam & Kerto® LVL Q-panel loadbearing components and  structural gluing it enables the elements very long spans, up to 20 meters, making it possible for structural designers to remove columns and increase design flexibility.

Kerto-Ripa designed elements can be of both open and closed structure and insulated to match every unique buildings exact requirements.

Advantages and facts about Kerto-Ripa designed wood elements:

  • Kerto-Ripa design combines Kerto® LVL Q- panels and Kerto® LVL S-beams as glued element
  • For spans 9 to 20 meters – Max length is 25 meters.
  • For roofs and intermediate floors
  • Quick construction process: Pre-fabricated element can include ready ceiling surface, thermal insulations and roof covering
  • Short assembly time - up to 1500m2 of weather protection in one day
  • Kerto-Ripa box slab is five times lighter in weight than the TT concrete slab  
  • Kerto-Ripa enables the main frames in smaller size and a lighter foundation
  • Next phases of construction can continue immediately, in dry conditions
  • Fire resistance up to REI90 and A1-s1,d0 reaction to fire classification
  • Thermal and moisture behavior of the structures are carefully tested by the Technical University of  Tampere, Finland 
  • Kerto-Ripa element has the European technical approval ETA-07/0029 and CE marking
  • Environmentally friendly
  • Kerto-Ripa design system can be utilized by anybody who enters into a partnership agreement with Metsä Wood. Including a license agreement to manufacture the elements as verified by the local authority according to ETA requirements.
Related documents
Tehcnical documents

Open Source Wood initiative

Open Source Wood: an open platform for innovative wood construction

In June, Metsä Wood launched its Open Source Wood project, where architects, designers and engineers are invited to join forces to innovate and share information relating to construction based on wood elements.

This project is a continuation of the Plan B campaign, and is aimed at expanding the market for urban wood construction by combining expertise from different countries. Metsä Wood is promoting element design by offering EUR 30,000 in prize money for element-based designs that make innovative use of Kerto LVL.

Read more and join the initiative

Applications for Kerto® LVL

References related to  wood elements

  • Hurlingham Racquet Centre

  • Viikki wooden apartment buildings

  • DB Schenker wooden terminal building

  • Mega Market commercial building

  • Metsätapiola - wooden office building

  • Tommi Mäkinen Racing building

  • Edinburgh Center for Carbon Innovation

  • Daycare Omenapuisto

  • Karisma shopping centre

  • Diesel Benelux headquarters

  • Le Pavillion wooden office building

  • Rakuunantie extention storey

  • Extension to a building in Paris

  • Östermalm’s temporary market hall

  • Dome of Visions 3.0

  • Esperi Kapteenska assisted living facility

  • School centre dining hall in Schwäbisch Gmünd