Part 1: Architect’s Guide 1 - 38 Fixing on steel purlins with self-drilling or self-tapping screw Fixing on wood purlins 1 Screw hook 1 Fixing without cover piece Figure 5.11 Types of fixings 4 1 3 2 5 6 1 Sealant coating 2 Rigid insulation 3 Insulation connection 4 Steel sheet 5 Screw on beam 6 Beam Figure 5.12 Typical view of a flat roof Figure 5.13 Corner of façade and roof – On site view
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