Schraubenpressklebung mit Nagelschrauben

Screw-press-bonding with nail screws.

The screw-press-bonding is a method to manufacture glued wooden joints. This technology is regulated in the new revised standard DIN 1052:2008 (which is based on the Eurocode 5). In practice it is only allowed to use self-drilling screws with partial thread to generate the required (contact) pressure. Based on different experiments the nail screw was tested as an alternative method. Three adhesives in all were used to make bonding between glued-laminated timber (BSH) and solid wood (VH), plywood (SH) and also laminated veneer lumber (LVL). Altogether, there were tested 932 specimens on their bonding strength on the basis of DIN EN 392:1996.
The results of this experiments show that bonded joints, which were manufactured with nail screws, generate enough strength to make a screw-press-bonding on the basis of DIN 1052:2008.