Critical Fall Heights

Determination of Critical Fall Height (CFH) is determined by a series of impacts being conducted in accordance with the requirements of the Head Injury Criterion (HIC) method.

Rapra Technology Limited was requested to conduct Critical Fall Heights on various depths of MONKEY PROOF® wet pour safety surfaces in accordance with the requirements of BS EN1177:1998, Impact Absorbing Playground Surfacing – Safety Requirements and Test Methods. The results obtained indicate that the impact absorbing safety surfaces achieve the following CFH values when tested on the sub-bases as indicated:

Concrete
35 MM SAMPLE CFH OBTAINED OF 1.40 M
45 MM SAMPLE CFH OBTAINED OF 1.48 M
55 MM SAMPLE CFH OBTAINED OF 1.65 M
65 MM SAMPLE CFH OBTAINED OF 1.77M
75 MM SAMPLE CFH OBTAINED OF 2.35 M
90 MM SAMPLE CFH OBTAINED OF 2.79 M
100 MM SAMPLE CFH OBTAINED OF 3.23 M

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MOT STONE
35 MM SAMPLE CFH OBTAINED OF 2.84 M
45 MM SAMPLE CFH OBTAINED OF 2.92 M
55 MM SAMPLE CFH OBTAINED OF 3.10 M

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