The extension connector makes it possible to achieve any length with the ‘Plus’ joist profiles. This is mounted as follows:
The extension is inserted into both adjoining joist, approx. halfway in each case
This is followed by the screw connection; this takes place from the outside through the joist into the connector. It is also advisable to pre-drill the screw connection points. This makes the screw connection much easier.
The following picture shows the installation:
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