FWPA Building Innovations

Lignatur Floor/Ceiling Plate System

Lignatur is a hollow box system forming a timber equivalent of pre-cast concrete planks about 1.0m wide. Planks can be joined together to form floor/ceiling plates but evenso, the system is essentially a hollow plank, one way spanning system. There are several variants of the system – mainly concerning the shape and form of the top and bottom diaphragm layers of the system which influence noise, fire, thermal and structural performance. Depths vary to suit spanning requirements and will comfortably cope with domestic construction applications, plus much longer spanning situations.


The hollow multibox cross section with regularly spaced bulkheads is structurally efficient with good material use - spanning ability is very good. The hollow sections provide space for noise and thermal insulation, and can also accommodate services pipe and wiring (though this is clearly easier in the spanning direction than the perpendicular direction). It is likely the units could be locally manufactured with better quality Radiata or Hoop Pine though sophisticated manufacturing processes will likely impact on cost. Lignatur planks could have a role as horizontal structural elements with conventional wall frames.


The system is less massive than concrete and therefore the acoustic and insulation performance is lower than concrete. Its best application is likley to be in multi-storey applications.




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Forest and Wood Products Australia Limited (FWPA), a not for profit company, is the Australian forestry and wood  products industry’s service provider, investing in research and development, and providing research results and generic promotions to the Australoian industry. FWPA aims to improve the competitiveness and sustainability of the Australian forest and wood products industry through innovation, investment in effective and relevant R&D and communication of the results to stakeholders. Read more about FWPA at www.fwpa.com.au

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