Reinforcement of notched purlins

Notched purlins are frequently encountered in wooden construction, and reinforcement may be essential to inhibit cracking in the grain direction.

This is where System WT can offer advantages which make all the difference. Thanks to the double threads, the critical forces can be spread and the problem zones de-stressed.The hidden fasteners also add aesthetic appeal and increase fire resistance.

WT fasteners are inserted directly without pre-drilling. Thanks to the precise head-profile, they can be easily counter-sunk into the wood.

That means they can be inserted at more or less any depth; i.e. where the forces need to be taken up.

They can also be inserted from the "blind side". System WT fasteners produce secure, precise bonds without glue; avoiding potential health and safety issues. Ease of application increases security and speeds up the job. "Win/win" with WT.

We recommend the power drill BO 1050 or a commercial drill with an equivalent RPM and power rating for easy fastener insertion

Using the WT-T40 preparation tool enormously simplifies the insertion process.



Insertion below flush is achieved using a T40 bit available from SFS intec in lengths up to 350 mm.