Ensure the maintenance of electrical functionality on wooden components according to DIN 4102 Part 12

Building with wood and still ensuring the best-possible fire protection: This actually becomes possible through the knowledge and the product portfolio of OBO Bettermann.

Ever more construction projects are being performed with wood, because the material is sustainable, cleaner and considerably lighter than other materials, such as reinforced concrete. However, besides these benefits, there is a huge disadvantage: Wood can burn. Thus, it seems something of a paradox to create buildings with complex fire protection with wood.

In particular in public buildings, safe fire protection is guaranteed: To allow evacuation in case of fire, escape routes must remain safely accessible and technical equipment, such as fire alarm systems, smoke extraction systems or emergency lighting, must continue to function.

However, the trend towards wooden construction must not be impeded by fire protection. Although wood as a material is one of the combustible materials, its properties in the event of fire are more beneficial. A layer of charcoal forms on the surface facing the fire, protecting the wood below against oxygen and thus preventing further burning. The remaining unburned residual cross-section in the wooden component can be determined, taking the combustion rate and other factors into account. The residual cross-section varies depending on the wooden component and the length of exposure to fire.

Safe fastening on wooden construction components, in conjunction with maintaining electrical functionality according to DIN 4102 Part 12

However, the trend towards wooden construction must not be impeded by fire protection. Although wood as a material is one of the combustible materials, its properties in the event of fire are more beneficial. A layer of charcoal forms on the surface facing the fire, protecting the wood below against oxygen and thus preventing further burning. The remaining unburned residual cross-section in the wooden component can be determined, taking the combustion rate and other factors into account. The residual cross-section varies depending on the wooden component and the length of exposure to fire.

Wooden components, unprotected in a fire protection sense, must fulfil some basic requirements so that cable support systems with the maintenance of electrical functionality can be installed in them:

  • The component must be made of solid wood (wood glue, laminated wood).
  • Calculatory proof for the basic state of use must be provided. This means that the component has sufficient static dimensions for the building.
  • A further calculatory method, so-called "hot measurement" (determination of carrying capacity of support structures in the event of fire) must clarify the extent to which the component must be dimensioned beyond the basic state of use so that the core of the burnt item can support the intended load in case of fire.

If the requirements for the wooden component have been fulfilled, the type of cable support system must be specified. OBO offers a product portfolio for the maintenance of electrical functionality, which has been tested and continuously expanded over time.

Safe installation on non-fire-protected wooden components takes place with screws specially approved for connection in wood. OBO wood screws are the ideal solution for reliable fastening on wood, meaning that maintaining electrical functionality according to DIN 4102 Part 12 is guaranteed.

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