4
Material (a)
Description
Minimum
depth (b)
maximum free height of fall
mm
mm
mm
Turf / topsoil
-
-
≤ 1000
Bark
20 to 80 particle size
200
≤2000
300
≤3000
Woodchip
5 to 30 particle size
200
≤2000
300
≤3000
Sand / gravel
0.25 to 8 grain size
200
≤2000
300
≤3000
Other materials and
depths
As tested according to EN1177
Critical fall height as tested
(a) Where the installed surfacing is verified (e.g. sieve test) as being in accordance with this table or carries a
test report according to EN1177, no additional testing is required
(b) For loose particulate material, add 100 mm to the minimum depth to compensate for displacement
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