Is there a wood weight chart for Aussie tree species, I'd be psyched to see it. When I do a pick I start small, consult crane computer and wood weight chart. My tuflex slings are usually in the range of what crane capacity is anyway. I'll try a chain on my next job to see if I like it. I've never had a sling slip when doing a pick. When I use nylon I guess it's for ease of use. I've never had a crane operator question thier strength if it has a load rating on it. Im' just exploreing this idea, so go easy on me.
MB & Frans:- If you want to have fun with big cranes and huge trees go to Victoria and Tasmania, but I aint moving coz you dont like our home or trees.
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Hey ekkka,
I was not putting down your video or your use of chains. The fact is, with the size of wood you cut, chains or slings does not matter either way.
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If my bro Ekkka wants to use chains for those little lifts, more power to em. I trust my bro Ekkka cuz he's a graduate of some Aussie Tree College, so he knows what he talking aboot! And he's been in the biz for several years now, so he knows he's an expert!
I reckon slings, especially a set of spiderweb adjustable slings on a single runner are the biz for craning out awkward tops. But for me, when your lifting out big arsed chunks, a chain is always nicer. I invariably end up doing the whole tree with chains, as its what I'm used too.
If your used to slings, chains would be a bitch to handle.
probably, they might be good for the trunk. Do you worry if the load settles back on the trunk, one of the chain hooks might come undone? What size chain for a 10000lb pick. I guess you'd get huge arms slinging those around.
I just got the time to watch the video. The helmet cam is really something, really felt like I was up there above the street, dropping pieces down and watching them bounce. I also am surprised that no one has mentioned the juxtaposition of Enya playing in the background while a chainsaw rips away at an old tree. Very unique.
To beat a dead horse, the chains made me nervous as I was watching them take the load of the main trunk, but hey, if it works, and it's deemed safe, than so be it!
And here is also a point of view camera I took in the swing in my back yard. I am just holding the camera. I would love to get a helmet cam for this...
MB, you are a blackout, quick run to the powder room and get some accolades for your latest outburst. "Oooh, look at me, I'm pissing Ekkkkkka off hehehehe."
The Australian hardwood generaly ranges between 1000kg/ cubic m and 1200kg/ cubic m (green). The air dried densitiy ranges betwween 500kg and 1100kg/cubic m.
E. regnans almost halve their density when dry, however E. microcarpa has a GD of 1170kg/cubic m, and ADD of 1120kg. cubic m.
When rigging E. regnans for lifting with a crane the density also changes significantly as you progress down the trunk. The upper sections(80-200') have reduced densities, however they jump markedly when you strike the water in the trunk. The lower sections will be running water as they are lowered.
That is one wild swing. I have to say, that takes some brass ones. I thought when lucy went, and the camera was just waiting for her to return into the frame, that maybe she kept swinging........
Here's David Kirke the inventor of bungee jumping takign part in the 21st aniversary jump off the original bridge the Clifton suspension bridge in Bristol.