Rothoblaas - Wood screws and connectors Page 217
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CALCULATION EXAMPLE: FASTENING OF CONTINUOUS INSULATION WITH DGZ PROJECT DATA Roof loads Permanent load gk 0,45 kN/m2 Snow load s 1,70 kN/m2 Positive wind pressure we 0,30 kN/m2 Negative wind pressure we -0,30 kN/m2 z 8,00 m Building length L 11,50 m Building width B 8,00 m Layer slope α 30% = 16,7° Ridge piece position L1 5,00 m Ridge piece height Building dimensions Roof geometry INSULATION PACKAGE FIGURES Rafters bt x ht 120 x 160 mm Wooden planking S1 20.00 mm Tile support battens eb 0,33 m Insulation layer S2 160.00 mm Wood grain (soft) bL x hL 60 x 40 mm C24 Commercial length Battens CONNECTOR SELECTION - OPTION 1 - DGZ Ø7 GL24h spacing i 0,70 m σ(10%) 0,03 N/mm2 LL 4,00 m CONNECTOR SELECTION - OPTION 2 - DGZ Ø9 Screw under tension 7 x 300 mm 60° angle: 126 piece Screw under tension 9 x 320 mm 60° angle: 108 piece Compressed screw 7 x 300 mm 60° angle: 126 piece Compressed screw 9 x 320 mm 60° angle: 108 piece Perpendicular screw 7 x 260 mm 90° angle: 72 piece Perpendicular screw 9 x 280 mm 90° angle: 36 piece Connector placement diagram. Roof batten calculation. STRUCTURES | DGZ | 217
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