2.3 – Wind loads for zintek® roof cladding – 3. Measures against lifting due to the wind forces 139 Formula to calculate the number of clips required (pieces/m²): Number of clips * = * fixing the metal clips with screws wind loads (kN/m²) pull-out strength of the clip (kN/piece) Pull-out test on solid wood board with rupture load value Pull-out test on wood-cement board with rupture load value EXCERPT
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