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Any sand or gravel with layer thickness presented in table 4 of EN 1176-1 is suitable when the particle size distribution D60 / D10 < 3.0.
- The D60 is the particle size below which 60% of the material is. Respectively, D10 is the particle size below which 10% of the material is.
- For example, sand which has D60 grain size of 6.01 mm and a D10 grain size of 2.39 mm has a particle size distribution D60 / D10 of 2.51 (6.01 / 2.39 = 2.51). Since this is less than 3.0, the material can be used as safety sand.
PATH
Safe to Play Book
3. Technical production3.3. Impact attenuation3.3.1. Evaluation criteria of impact attenuation3.3.1.2. EN 1176-1 table 4