;providing distance guards to ensure that the hazard zone cannot be reached the length of the
distance guard [tunnel guard, see ISO 14120:2015, 3.2.2) shall be at least 550 mm (forearm length
according to ISO 13857:2008, Table 3) [see ISO 13857 as appropriate for the type of safeguarding)
My understanding is when the openings are larger than those allowed for in the tables, etc. for reaching through either; close guarding can be installed with the appropriate sized mesh or similar, or distance guards installed to prevent a person from being able to reach into the "danger zone" from behind the guard.Taking that clause to mean we are to apply ISO 13857(equivalent to AS/NZS4024.1801), Table 3 states the 550mm distance referenced is only applicable for openings <120mm (square, round, or slot). From Table 5, openings larger than 180mm slot or 240x240 square or round will allow whole-body access. — James
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