Welcome Guest! The IOSH forums are a free resource to both members and non-members. Login or register to use them

Postings made by forum users are personal opinions. IOSH is not responsible for the content or accuracy of any of the information contained in forum postings. Please carefully consider any advice you receive.

Notification

Icon
Error

Options
Go to last post Go to first unread
Admin  
#1 Posted : 10 December 2004 09:47:00(UTC)
Rank: Guest
Admin

Posted By Gordon Thelwell

Found this today by the HSC:

http://www.hse.gov.uk/re...sl_pdf/2003/hsl03-09.pdf
Admin  
#2 Posted : 10 December 2004 11:25:00(UTC)
Rank: Guest
Admin

Posted By Sean Fraser
and you point is, caller?
Admin  
#3 Posted : 10 December 2004 11:46:00(UTC)
Rank: Guest
Admin

Posted By Gordon Thelwell
A: That truth is no stranger to the teacher of madness

B: That no man is wise at all times

C: That competence without knowledge is a qualification in ignorance.

Take your pick.
Admin  
#4 Posted : 10 December 2004 14:13:00(UTC)
Rank: Guest
Admin

Posted By Peter MacDonald
Excellent posting.

Have passed on the link to our Working At Height Group.

Peter
Admin  
#5 Posted : 10 December 2004 17:19:00(UTC)
Rank: Guest
Admin

Posted By Gordon Thelwell
anytime Peter.
Admin  
#6 Posted : 10 December 2004 19:59:00(UTC)
Rank: Guest
Admin

Posted By Stuart Nagle
And this today from the HSE (Via Croners alert service) which I find a touch mystifying.... If a person is required to wear a harness, by not attaching either end of the lanyard, or only one end (not to the harness)...how is the harness supposed to be effective in incidents where persons fall (e.g. in aresting a fall)?

Read for yourself.... as below. or am I misunderstanding this - explainations please:

The Health and Safety Executive (HSE) has issued a warning about the importance of following manufacturers’ instructions on the use of fall arrest equipment, and in particular systems based on twin-tailed energy-absorbing lanyards.

The warning follows a recent incident in Australia, where a worker was killed when his lanyard failed.

An energy-absorbing lanyard is a line for connecting a full-body harness to an anchorage point, with an inbuilt in-line device that reduces the impact of a fall. Twin-tailed lanyards enable users to move freely whilst remaining clipped on at all times.

Martin Holden, Principal Specialist Inspector with the HSE’s Construction Division Technology Unit, said it is vital that everyone using fall arrest systems based on twin-tailed lanyards understands and follows the manufacturer’s instructions.

He stressed that when one of the lanyard legs is connected to the anchor point, the second leg should not be attached to the user’s harness, or to a belt or other item of clothing, as this could limit the extension of the energy absorber in the event of a fall.

Mr Holden said that if this happened, excessive arrest forces would be applied to both the user and to the system, which could lead to equipment failure with potentially fatal consequences.

Unless the harness has been provided or retro-fitted with lanyard “parking” points, which are specifically designed to break away in the event of a fall, the second leg should be left to hang free. Alternatively, the HSE says, on this and only this specific type of lanyard, the second leg can also be connected to the anchor point.

The HSE stressed that employers must have formal procedures in place to ensure that equipment is used correctly, and workers must know how to use lanyards properly and should check them regularly before use.
Admin  
#7 Posted : 13 December 2004 10:45:00(UTC)
Rank: Guest
Admin

Posted By Peter MacDonald
My take on this:

One harness jhas two lanyards.

The point of wearing a double lanyard is that you can always be clipped on even when removing a clip on point. You only clip on one lanyard at a time but if you wish to transfer yourself from one clip-on point to another you can use the free lanyard to attach yourself safely until such time you have readjusted your original lanyard. Of course you have the option to retain the second attachment and leave the first unattached. This is opposed to removing your only single lanyard to move position and not being tied on at all.

If the lanyard you are wearing is an energy absorption type (it gradually slows you down by pulling a folded section of lanyard out of a restraining pocket) it is calibrated for a certain weight of user (usually 80kg to 100kg). If you have two of these on at the same time of the same length then you will not generate enough energy to activate the system and you will come to an immediate body jarring halt.

Does that make any sense??


Peter
Admin  
#8 Posted : 13 December 2004 13:00:00(UTC)
Rank: Guest
Admin

Posted By steve e ashton
Stuart,

think of the device as a letter 'Y'. the shock absorber is the upright - the lanyards are the two 'arms' of the Y. the reason for having twin lanyards is to enable the user to be clipped on at all times even when transferring between attachment points.

The problem with attaching the 'loose' lanyard to the body harness or other clothing is that the fall distance will then be restricted to the combined length of the twin lanyards. The shock absorber won't be able to 'stretch' to its full extent. In a fall the user will be brought to an abrupt halt reducing or defeating the margin of safety provided by the absorber.

Hope this helps understanding

Steve
Admin  
#9 Posted : 14 December 2004 08:41:00(UTC)
Rank: Guest
Admin

Posted By Jim Gostick
Gordon the HSE info is very informative thanks. As work at height is growing in profile I wonder if companies will improve the design of harnesses? whilst they are very good at preventing a person hitting the floor, there is still a secondary issue of the > 10 - 15 min hanging time. Where blood flow is reduced at the femoral archeries. Whilst lone working should always be avoided and there are now winch harness available - there must still be concern in relation to the speed of which a can be recoverd.
Admin  
#10 Posted : 14 December 2004 15:23:00(UTC)
Rank: Guest
Admin

Posted By Robert K Lewis
But the HSE advice is confusing if there are 2 separate landyards and not the Y formation. On the first type there is NO disadvantage to clipping back to the harness as each has an independent shock absorber. There is however the possibility of lack of deployment if both are clipped on to the anchor point.

Ther emphasis is Know Your Harness

Bob

Admin  
#11 Posted : 14 December 2004 16:47:00(UTC)
Rank: Guest
Admin

Posted By Peter MacDonald
Suspension trauma is always a hazard that should be considered as part of the safe system when working at height. In our line of work we would tend to have a MEWP or crane and man basket available to "rescue" and make safe before the emergency services arrived. When working off scaffolding there are various off the shelf systems for either lowering or raising people to a point of safety such as the Spanset Gotcha system.

Peter
Admin  
#12 Posted : 15 December 2004 09:17:00(UTC)
Rank: Guest
Admin

Posted By Gordon Thelwell
Jim,

An excellent point that I hoped someone would mention. Our work involves high level tasks within the structure of pallet racking, an environment that would not cater for readily available MEWP access. Having a MEWP ‘just in case’ is not seen as reasonably practicable and would price us out. So what could we do? I’m open to any suggestions.

Many thanks,

Gordon.
Admin  
#13 Posted : 15 December 2004 14:48:00(UTC)
Rank: Guest
Admin

Posted By Peter MacDonald
The Spanset system and others like it could be your answer to rescue at height. If you have clip on points for harnesses then you can use it. Its basically a system that comes in a bag (about the size of a rolled up sleeping bag) that can be set up quickly by an individual using clamps and an extending pole to locate a connection point on the victims harness. This is easier when the victim is still conscious but it is designed for when they are not. Once connected you can lower or raise the victim to a point of safety. The equipment and training is relatively cheap

Peter
Admin  
#14 Posted : 15 December 2004 14:55:00(UTC)
Rank: Guest
Admin

Posted By Gordon Thelwell
Fantastic!

Many thanks!
Admin  
#15 Posted : 15 December 2004 16:27:00(UTC)
Rank: Guest
Admin

Posted By Jim Gostick
Gordon, there could be a separate posting forming here! What manufacturers could design is a wider/cushioned harness that spreads weight around the thighs and groin areas to reduce the blood restriction. Maybe even a suit that could be worn. - akin to a wet suit for example that would be suitable/comfortable and robust for say construction work.

(Remember Ar*o you saw it here first!! 20% royalties please hahaha)
Users browsing this topic
Guest
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.