Design & Planning

Fixing Types

To fix the flange to the wall, take the following into account:

The fixing screws of size ≥ M8 or through wall anchors must have a Fire Safety Certification and should be fitted at a distance of 100 mm to ensure its impermeability to smoke. In addition, the fire protection bulkheads are covered with silicone glue to counterbalance any potential unevenness in the wall or ceiling. When selecting a appropriate approved fixing method, a few points need to be remembered and ascertained in advance:

  • Manufacturer Fire Safety Certification
    Often, not all sizes of the dowels or anchors in a product line possess the general building authority approval, even if the product documentation and labels list “general building authority approval” and “fire protection”. In some cases, limitations are listed with respect to substrate and the type and height of the permitted load.
  • Fixing
    Not all dowels or anchors are certified for all common anchoring materials.
  • Edge distance to the breach
    In order to prevent the material from breaking in the area of the connection, dowel and anchor manufacturers specify edge distances of between 50 and 100 mm, depending on the load. In general, we design with an edge distance of 50 mm between the breach and hole circle, since the force per dowel or screw is less than 0.25 kN for screw distances of approx. 100 mm. All screws support only the weight of the expansion joint or membrane, and must ensure a reliable seal against the wall or ceiling.
  • Material of the fixing screws
    We recommend using galvanized steel in covered buildings and stainless steel fasteners outdoors.