17 Down Under:
17 DOWN UNDER. "A celebration of moderate grade climbing in Victoria". 184 pages. 285 images. Father & son team, Steve & John Morris, embark on a journey to climb and photograph 50 of the best rock climbs in Victoria, grade 17 & under. Inc bookmark $50.00
On 11/04/2013 One Day Hero wrote:
>6:40.............haven't even bothered to equalise the two bolts, despite
>slacklines apparently being so "forcey" that all the ones at araps need
>to be 3x15mm monsters.
>Fuch off slackliners, you're full of shit!
Actually I think you're way off the mark. There is no equalisation to be done on the line. They are only using one bolt.
He jsut had the wrong size, is a good crack! smaller cams are needed for the top, green and red C3's are useful.
Thats a crap way of rigging the highline!! 8mm U's cant stand up to cross-loading like that, they bend!! It wasn't a super tight line so that helps lower the loads. When i rigged it we equalised both sides, and ran the back up onto some cams as well. You will see they had the line on one set, the rope on another.
Bloody oath having three bolts is justified, suggesting otherwise shows a pretty big lack of awareness of standard rigging principles, safety margins etc.
On 11/04/2013 sliamese wrote:
>Thats a crap way of rigging the highline!! 8mm U's cant stand up to cross-loading
>like that, they bend!!
So if one were to wander down to the Tote now, they will find bent bolts? Or do you mean "they could potentially bend but may not have"
>Bloody oath having three bolts is justified, suggesting otherwise shows
>a pretty big lack of awareness of standard rigging principles, safety margins
Aren't they banging in 14 or 15mm bolts? There's no way you can still be worried with 2 of those.
I have no idea, but I'm sick of people attempting to math geek things which are very easily measured, despite the measured values consistently coming in well below the geeked values. Someone will have tried a long line with a fat prick and a load cell and will have the results up on the interwebs. Go look and tell us what you find.
this is what people use for highlines, not whats in those tests generally. comparing apples with oranges aint too good...
found that, WLL of 13.4kN suggests anchors with ultimate design load of 65kn. I remember one of my friends lines was theoretically loaded to 10kN, over a 40m distance. looks to me like their testing nylon lines(cheap, for use in parks) not the longer polyester lines that a pulled much tighter.
I can show you a bent U on hobarts Organ pipes, didn't the missing link anchors get bent also? Hence my suggestion of 2xM16 studs or 3 x M12.
But your right in that your doing well to break them, and thats what the ropes for. I've only broken one tube-tape line that had 4 people on it.
On 11/04/2013 One day Hero wrote:
>On 11/04/2013 sliamese wrote:
>>Thats a crap way of rigging the highline!! 8mm U's cant stand up to cross-loading
>>like that, they bend!!
>So if one were to wander down to the Tote now, they will find bent bolts?
>Or do you mean "they could potentially bend but may not have"
No idea about the totem pole but i bent an 8mm u-bolt on the organ pipes (mt wellington) high line when it was (temporarily) on one bolt during the rigging process - it does happen
Cant comment on oversize bolts but 3 normal climbing bolts is definitely not overkill
That is kind of cool. Webbing made from Dynama/Spectra/Whatever/Ultra-high-molecular-weight-polyethylene. You pay for it though. 10 bucks a meter. Gonna need a grant to rig that line from the Bluffs to the Organ Pipes. Hell even that line from Dunes to Missing Link was at least 500.
>Aren't they banging in 14 or 15mm bolts? There's no way you can still
>be worried with 2 of those.
The ones I looked at on top of Dunes and opposite looked like 12mm rod.Mostly petzl hangers which I think are 25kn but a couple of Singing Rock ones which are 22kn.