Air-Termination Rod; Discharge Of Lightning Current - dehn 105 525 Installation Instructions Manual

3.2

Air-termination rod

The tubular air-termination rod is vertically inserted into the adapter of the brace frame and the four
M8 locking screws are tightened (tightening torque of 15 Nm).
The four M8 hexagon nuts have to be tightened against the adapter (see Figure 7 on page 12).

3.2.1 Discharge of lightning current

The air-termination rod is electrically connected to the metal roof via the brace frame and the four
conductor holders / clamps. Therefore, an additional down conductor (e.g. by means of a round wire
8-10 mm) on or along the roof area is not required provided that the metal roof is integrated into the
external lightning protection system.
The metal roof is integrated into the external lightning protection system e.g. at the eaves while main-
taining the typical down conductor clearances and is thus connected to the earth-termination system.
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