Ascentree rope friction

[David Humphries]

Just a heads up.

 

Trying to gain a bit of background before contacting Petzl.

 

 

 

We mainly use the double handed ascender as part of our initial srt access backed by hc & hitch.

Before moving over to Drt to work. (leaving the patron in place as a secondary emergency access line)

 

The ascender gets changed around each and every time to make sure that both sides get used.

The wear is on bothsides.

 

I had to pop up to the top of the oak we were tickling recently & noticed that the patron was getting glazed by the bottom of the right hand side yellow plastic hand grip on the Ascentree.

 

Has anyone (if used) noticed this themselves?

 

We're going to go down the route of not using the central krab hole (as It looks as if this is the cause of squeezing the rope on to the plastic) and using the two alternative holes instead with krabs or mailons.

 

Thoughts please?

 

 

 

.

[David Humphries]

Having had a look at the ascentree manual it appears to show the central hole as the main connection point in the illustrations.

 

 

Also the TCIA SRT best practice booklet shows the same connection point being used.

 

 

http://pdf.directindustry.com/pdf/petzl-securite/technical-notice-multilanguages-ascentree/8817-152751.html

 

.

[David Humphries]

In the long term I think we will start using the two side attachment holes(probably a couple of tapes & mailons) but in the short term will just alternate with a single rh & single lh ascender.

 

 

If you look at the both the lh & rh single petzl hand ascenders (which in essence the double handed one is) the main attachment hole is machined in a different position.

 

 

 

.

[Marc]

Most of my ascendors have this wear, it just seems normal wear and tear to the handle plastic.

[David Humphries]

Most of my ascendors have this wear, it just seems normal wear and tear to the handle plastic.

 

But this creates wear/glazing on the line

 

Have you noticed any on yours?

 

.

[nathan marshall]

surely the line is seing glazed more by the moving hitch rather than the handle.

one of my lines ha more damage though the toothed spikes on the cam rather than heavy glazing.

 

 

how bad is the glazing.

[Marc]

But this creates wear/glazing on the line

 

Have you noticed any on yours?

 

.

 

Nope and trust me my regular access line is donkeys years old, can you post pics of the glazing?

[David Humphries]

how bad is the glazing.

 

Not enough to retire the line/fail Loler examination, but enough (from the perspective of this semi retired climber) to warrant investigating a potential design issue that places the rope against an abrasive surface & puts wear on the life line of my teams climbers.

 

 

 

 

.

[David Humphries]

Nope and trust me my regular access line is donkeys years old, can you post pics of the glazing?

 

In meetings all day tomorrow but will try and get some shots up over the weekend

 

 

 

.

[Marc]

In the long term I think we will start using the two side attachment holes(probably a couple of tapes & mailons) but in the short term will just alternate with a single rh & single lh ascender.

 

 

If you look at the both the lh & rh single petzl hand ascenders (which in essence the double handed one is) the main attachment hole is machined in a different position.

 

 

 

.

 

Well it looks like you have not used the single ascender much in time you may notice the same wear on these to, and maybe not depending on how you push up the ascendor.