Posted By Ron Hunter x2 was the figure quoted by HSE, and I'm sure it's in their guidance somewhere. I would add the caveat that this approach can only be considered as an interim (short-medium term) pending first-hand commissioning or researching of real time data already conducted by others from reputable/trustworthy source.

Posted By jasonT Our firm was issued with an Vibration Improvement Notice last year. We added 20% to the manufacturers ratings and adopted the Traffic Light System. The Hse were more than happy with this, please also ensure staff have regular medicals in place, since the notice 7 people have been diagnosed with Hav's Jason

Posted By SCN x2 did come from a HSE circular as they reckon and quite rightly so that the data stated was from ropey sources such as medium breakers being tested in buckets of ball bearings ! However a long chat with our local HSE man and a representative of a hire company that rhymed with Impeedy or Seedy (you know who I am on about) sorted the position. They were getting their kit tested by some boffins at Loughborough for accurate readings. The HSE chap was more than happy to accept the Seedy data as acceptable and no multiplier needed. This was 16 or so months ago and it was in the NW of England so cant comment on rest of country but may be worth a sit down chat with them Of course if you buy your kit or use a different supplier then safer to go with x2