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Posted By GeoffB4
Is there any printed literature available providing 'trigger ratios' for equipment such as strimmers, hedge trimmers, chainsaws, stone saws etc?
I'm trying to find out, for example, if someone was using a strimmer for two hours, how long typically would he/she be actively using the strimmer over that time as distinct from the equipment idling and/or the operative resting.
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Posted By FAH
HSE web-site Geoff; check that against the info provided by the manufacturers of the tools.
I would also advise on building in a safety factor to cater for ranges of vibration as a consequence of different materials, methods of use etc.
Frank Hallett
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Posted By GeoffB4
Thanks Frank but done all that.
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Posted By Coshh Assessor
This may sound simplistic, but - ask the operator?
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Posted By SteveD-M
Geoff drop me an email I have a table that may help.
Have you checked the manufacturers instructions (Before anyone asks Yes I know that some don't put the right measurements down ...but it's a start...)
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Posted By GeoffB4
COSHH, I was looking to see if there were any national accepted figures I could use as a guideline.
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Posted By Ron Hunter
Geoff, I'm not aware of any benchmark figures either, however I would have to suggest that part of your risk management strategy should involve a bit of "time and motion study" of the people involved.
The important thing is to get everyone educated and onboard from the outset, otherwise you'll get seriously skewed data. Operatives will most often grossly exagerrate trigger times in an attempt to justify their time. From local experience, quoted figures of "4 hours a day" can actually equate to as little as half an hour HAVs exposure.
Do your toolbox talks first. From the equipment you list, strimmers are usually the biggest problem -these often have high vibration figures (far in excess of those quoted by the supplier), they tend to be over-used (where other mechanised options are available) and frequently abused by less-skilled operatives.
Bring back the scythe!
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Posted By Zman I've been doing some work on HAVS recently and would suggest you look at the following; www.brandonhire.co.uk for their Vibration Safety Guide www.gap-group.co.uk for their Hand Arm Vibration Safety Guide and do a search for "HAVS_Levels_Database", it's somewhere on the HSFB website and the search will find it for you. I found the information very useful.
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Posted By GeoffB4
Just what I was looking for. I knew it was somewhere.
Many thanks Zman,
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