Fig. 7
From: Laboratory tests to understand tephra sliding behaviour on roofs
Mean sliding angles and range of values for tilt tests with 10–30 cm of pumice, scoria and ash on metal sheet, fibre cement and tile roofing. Dry deposits were tested on dry and wet roofs; wet deposits were tested on wet roofs. Dry deposits of 10 and 20 cm of pumice and scoria were also tested on dry weathered metal and fibre cement. In the key the hyphenated symbol descriptions refer to the state (dry or wet) of the deposit-roof. All results are available in Supplementary material