lowering device

[bob]

i dont doubt for a minute that your not one , had i gone down the route of contract lifting with the crane company then yes i would have a qualified appointed person on site , so where did you do the training for that then bob ??? im interested

 

i did mine with a firm in suffolk and the course was filled with tree bods and aimed just at tree work

will try to look out details

[Tommy_B]

the device in mention was not made by some pratt in a garden shed,it has been made by a professional,someone with serious, engineering skills and welding to match ,take it from me,whoever buys one will not be dissapointed,id rather take my chances with this device,than rapping a rope over a branch and using the trunk as a brake.

 

Was the lowering device the same one that I put a link to? You never answered me earlier.

[Rupe]

these are the factors of which you devide the MBS

 

Metal work divide by 5

Rope by 10

Textiles by 7

 

Good enough, but for easy maths replace 7:1 with 10:1 and metals for ppe should be 10:1 also.

 

My previos calc was wrong then you were right swl 600kgs for that thing. Still a bit high IMO.

 

Anyway of you go by the straps 10% of the MBS would do. For the money it looks good to me, I've used home made stuff, still have one somewhere and never worried about SWL and stuff much, just use your common. Sound liek brian is still goign to be natural crotchign anyway so that takes alot of the strian away form the device and into the rope which will probably break before the bollard does.

[Marc]

the device in mention was not made by some pratt in a garden shed,it has been made by a professional,someone with serious, engineering skills and welding to match ,take it from me,whoever buys one will not be dissapointed,id rather take my chances with this device,than rapping a rope over a branch and using the trunk as a brake.

 

Made by a professional with many years arb experience who knows how this type of kit is applied in tree work?? He could build space rockets, if he's never seen snatching operations how can he design a tool for such use? its easy to copy a design but unless you understand the dynamics the device will be subject to its very easy to get it very wrong.

 

When you buy a device from Greg Good, Reg Coates or ISC and Buckingham your buying from those who know how to make devices specific for our work.

 

No offence i'd rather take a wrap round the trunk at least I wouldn't be worrying about a steal tube shooting up the tree towards me. For girly lowering though it'll be fine:001_tongue:

[dangerous brian]

to tommy b no the one i have is a lot more heavyduty than the one you showed,and the guy who built had long background i tree surgery.

[skyhuck]

to tommy b no the one i have is a lot more heavyduty than the one you showed,and the guy who built had long background i tree surgery.

 

Have you an item number?, so we can take a look

 

Or does the groundie have it??

[Tommy_B]

to tommy b no the one i have is a lot more heavyduty than the one you showed,and the guy who built had long background i tree surgery.

 

Thank you for getting back to me Brian.

 

Can you stick some pictures up of it?

 

Cheers

 

Tom

[Mark Bolam]

Why don't you fellas save yourselves a few quid?

 

Employ a fat groundie.

[Robert_S]

or just cut and chuck the lot and the groundie clears everything up for when you come down:001_smile:

 

Has anyone seen a mig/arc weld tear off one of these devices as that must be some force?

[Dean Lofthouse]

 

Has anyone seen a mig/arc weld tear off one of these devices as that must be some force?

 

That might be more to do with the person who welded it rather than the actual weld or force applied