Jump to content

Log in or register to remove this advert

Old Growth fir topping


RC0
 Share

Recommended Posts

24 minutes ago, AHPP said:

Good video as always. Thanks for putting them up.

Did you consider boring it? Small saw with a 16" bar maybe. Obviously far harder for the gob but a much more manageable saw for a bore. Maybe on a shallow lean, the 30" bar, take the sides in and fast back cut is the way but on a hard lean the scales could tip in favour of boring. Thoughts?

The canopy weight on the fall side was enormous, loaded with 8 inch 25 ft limbs. A bore cut would work fine, no doubt. Consider though, if you thing it's safe to position yourself on the underside of that lean cutting away at the holding wood with a lititle saw. Let's say that goes ok and it's time to evenly create a hinge across 30 in with a 16 in bar without the top releasing prematurely. Having a saw that cuts and closes the gap fast enough to keep up with the pull of gravity in such situations is critical. That's a ported 372 with  brand new chain. I knew I could cover that ground fast with enough bar length to span the dia meter required. On the ground it's different, you can run off in the worst case scenario. Up there you're stuck. If an internal split is pre-existing, or develops during such a situation, itd be hard pressed to extent to the outside and barberchair because the side cuts have already released the tension. But listen, I'm not a teacher:), don't take my word for anything. Every individual should just do what they feel is best. If in doubt, climb higher.

  • Like 4
Link to comment
Share on other sites

Log in or register to remove this advert

The canopy weight on the fall side was enormous, loaded with 8 inch 25 ft limbs. A bore cut would work fine, no doubt. Consider though, if you thing it's safe to position yourself on the underside of that lean cutting away at the holding wood with a lititle saw. Let's say that goes ok and it's time to evenly create a hinge across 30 in with a 16 in bar without the top releasing prematurely. Having a saw that cuts and closes the gap fast enough to keep up with the pull of gravity in such situations is critical. That's a ported 372 with  brand new chain. I knew I could cover that ground fast with enough bar length to span the dia meter required. On the ground it's different, you can run off in the worst case scenario. Up there you're stuck. If an internal split is pre-existing, or develops during such a situation, itd be hard pressed to extent to the outside and barberchair because the side cuts have already released the tension. But listen, I'm not a teacher[emoji4], don't take my word for anything. Every individual should just do what they feel is best. If in doubt, climb higher.

 

It’s largely academic. I’d have wanted the big saw rather than spiking around to match cuts (unless it was a truly exceptional lean/weight - or I’d just go higher).

I don’t follow what you’re saying about the side cuts. I use them to make the back cut faster and prevent barber chairs that way. If you cut slowly, surely you still risk barber chairing, the crack starting in the narrow rectangular bit and then spreading to the full width.

adce067e8bead6d487fe7093038a8ecc.jpg

Or is it that the sides of the stem contain the inner stem that might want to chair?

3202c678069a0eccd55e5c7965f1f8ed.jpg

 

Link to comment
Share on other sites

  • 1 month later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  •  

  • Featured Adverts

About

Arbtalk.co.uk is a hub for the arboriculture industry in the UK.  
If you're just starting out and you need business, equipment, tech or training support you're in the right place.  If you've done it, made it, got a van load of oily t-shirts and have decided to give something back by sharing your knowledge or wisdom,  then you're welcome too.
If you would like to contribute to making this industry more effective and safe then welcome.
Just like a living tree, it'll always be a work in progress.
Please have a look around, sign up, share and contribute the best you have.

See you inside.

The Arbtalk Team

Follow us

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.