Underpinning knowledge for the medium fell assessment.

Having just completed the audio programme for underpinning knowledge for small fell, in this episode we'll take a look at the guidance given for the Level 3 Award for Felling & Processing Trees Over 380mm.

There is some overlap between the 'small' fell and the 'medium / large' fell assessments, and as before I've left gaps of a few seconds between the different criteria in the assessment. You can download the qualification guidance directly from NPTC.

Here it is...

Medium / Large Fell: space available.

There is a space available on the medium / large fell course at Sparsholt College.

The course, which runs in January from the 27th-31st used to be the old CS32, but is now the Level 3 Award in Felling and Processing Trees Over 380mm.

In this course, you'll learn a variety of different cuts and deal with winching operations, as well as legal and environmental considerations and health & safety issues.

To find out more, you can visit the NPTC website where you  can find details of the assessment requirements at http://www.nptc.org.uk/qualificationschemedetail.aspx?id=352 or contact Sparsholt College at 01962 797213 (Gill Yeeles).

Back To The Future: Bore Cuts (2)

Now that I've started on this route, I guess I'd better finish it! So here is the second 'bonus' posting - but only because I didn't get to finish it all of in the first posting about bore cuts! In this article we'll have a look at the second of the bore cuts that you'll need to be able to demonstrate and use for the CS31, and quite likely for the CS30 too. That's CS30 as well, as opposed to CS32... just sayin'. That second bore cut is the vertical bore cut, and I feel that it's appropriate to let you know hat this one has the potential to be very dangerous, as you'll be cutting very close to the kickback zone and even with it. Be careful with this one. Find out more after the jump...

Why would we use a vertical bore cut? Easier to watch a demonstration than listen to an explanation, but I'll give it a go... Look at the image at the top of this page, you can see that the underside of this piece of timber is not touching the ground and yet there was not enough room to get the bar and chain under the timber, without the chain running into the ground. In this case, with the compression cut already made on the top of the timber, we needed to cut from under the timber, back up to meet the compression cut.

To get over this problem of a lack of space, we can bore into the timber and then cut downwards and out of the bottom, as there is enough space for the chain to pop out from under the timber without striking the ground.

The other thing that you can see from this image is just where the bar and chain are positioned - note that the cut will be started slightly behind the kickback zone, and not on it.

Ensure that the saw is running at full speed whilst you do this cut, it's actually safer, and also make sure the saw is sharp. But perhaps the best advice for this cut is keep your head out of the line of the bar. Start the cut and allow the saw to cut a little way in, before levelling the saw out and pushing through the timber completely. Now you can come out of the bottom of the timber, before cutting up to the compression cut (in this case).

Try to do this in one fluid movement, saw at full speed and head out of the way - it doesn't bear thinking about what would happen if you had kickback... Also, be confident with this cut and hold the saw securely and comfortably.

I will be revisiting bore cuts, especially as now that I've started to write about them, the more I can think of to tell you!

Keep safe.

Back To The Future: Bore Cuts (1)

This is a bit of a bonus posting, as I've got 10 minutes free to quickly add an article! And so, in this post we're going to go back to the future and look at bore cuts. Why 'back to the future'? Well, bore cuts currently form part of the CS30 chainsaw maintenance course, but are heavily used during the CS31 (and CS32) felling courses; because of this, it'll be useful to both groups of people - those undertaking CS30 and those doing CS31. I'll try to put together a short video of completing a bore cut as it's much easier to see it, rather than describe it, but for now you'll have to make do with text! Find out more after the jump...

There are two types of bore cut: horizontal and vertical. The image at the top of the screen shows the horizontal bore cut, and is used a lot in conjunction with felling techniques (rear-weighted, forward weighted, medium and large fell). The vertical bore cut is used to cross-cut timber, especially where there is not enough room under the timber to physically fit the bar and chain, and you want to cut upwards; although there is enough room to bring the chain out of the bottom of the timber without it hitting the ground.

The Horizontal Bore Cut

The horizontal bore cut is slightly safer than the vertical bore cut, but is perhaps more difficult to get all the levels correct. You will need to keep the saw level from the tip of the bar back to the rear handle, as well as keeping it flat from side-to-side.

This is easily achieved by positioning your hands correctly on the handle; remembering that your thumb on the left hand must remain around the handle (see the Bad Habits: Thumbs Up! post). First off, getting it level from side-to-side is just a matter of moving your left hand right around the handle as far as practicable, this will automatically put the saw in the correct position. Easy!

Now for getting the saw level front-to-back. Many operators continue to hold their right hand in the same position (finger on the throttle) and twist their wrists to account for using the saw on its side. However, this often results in the rear handle being held higher than the tip of the bar and so the saw is not level. Instead, as you twist the saw on to its side, getting it ready for the horizontal cut, allow the rear handle to move around in your right hand; you should find that you can operate the throttle with your thumb.

Stand so that the underside of the nose of the bar will be introduced into the timber, then cut down to about where the nose sprocket rivets are. At this point, keep the nose of the bar in the same place and swing the rear handle around so that the saw is now directly pointing into the timber. Now push. Not too hard, and keep the saw running at full power until you have bored through to the required depth.

Allow the chain to stop in the bore cut before pulling it out of the wood (it might be wise to flick the chain brake on too at this point). Now, we are going to need to refine this a little bit but that'll be what the video is for... I just need to shoot it first ;0)

I reckon my 10 minutes is definitely up, and I'll leave vertical bore cuts for another post...

Latest Update On Assessments

As I mentioned way back in my last blog article, the chainsaw certification process is to be changed at some point in the future, and I had some doubt as to what the changes would be. However, NPTC had made the proposed schedules available and after reading through them and forwarding on my comments before the consultation period ended, I think (on the whole) the changes would be good. Find out more after the jump...

So what are the changes? Firstly they are proposing to amend the actual structure of the certification, as well as changing the schedules. Here, in brief, is a summary of those changes...

• The risk assessment, emergency planning and various other knowledge elements are to be brought together and made in to a 'knowledge unit' that is to form part of the foundation certificates. The CS30 is the other foundation course and, by and large, remains similar to the existing one.


• The CS31 small fell is to include rope / winch work (winching is currently part of CS32).


• The CS32 (medium fell) is to now include the felling of weighted trees. This is a major change and one which makes some sense as although the same cuts are used as small fell, the method of achieving them is different.


• The climbing and aerial rescue course is to be called CS38 (as it used to be!) and some major changes are being proposed for this; including... a tree identification element where the student will have to recognise 10 different tree species. The aerial rescue will also have to include a pole rescue as well as a 'tree' rescue. I think this is to be applauded and definitely a move in the right direction.


• The CS39, using a chainsaw from a rope and harness, is to have additional cuts added to the schedule. This will result in the student having to complete both horizontal and vertical cuts, which is basically simulating the cuts required for dismantling.


The above summary of changes is only a proposal at the moment, and I'm not sure that anything will happen until LANTRA get the National Occupational Standards approved - which could take some time.

For now, the courses and assessment schedules remain as they are - so I can get back to creating some new videos and writing some more about chainsaw maintenance and cross-cutting.