Fig. 8
From: Laboratory tests to understand tephra sliding behaviour on roofs
Impact of key factors (shown in Fig. 1) on mean sliding angles for tilt tests, a deposit thickness: 10, 20 30 cm, b grain size: coarse-grained, fine-grained (defined in Fig. 3), c tephra type: pumice, scoria, ash, d presence of water: dry tephra on dry roof, dry tephra on wet roof, wet tephra on wet roof. Plots show results on three roof materials: metal sheet, fibre cement sheet and tiles