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About Husqvarna
The
Husqvarna Group is the world's largest producer of chainsaws,
lawn mowers and other petrol-powered garden equipment such as trimmers
and leaf blowers, as well as one of the world's largest producers
of garden tractors. Husqvarna is also one of the world's largest
producers of cutting equipment for the construction and stone industries.
The product offering comprises equipment for both consumers and
professional users.
Husqvarna Outdoor Products,
PO Box 76-437, Manukau City, Auckland
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Back to basics − thinning techniques
Harriet Palmer
New
Zealand Tree Grower November 2008
The latest Wellington branch field day – Thinning: back to basics − was
organised and hosted by Dave Gratton at his Upper Hutt property. As
ever when Dave is our host, safety and good
working practices were a key component of the day. Dave has been the
NZFFA’s national Health and Safety representative for many years, a
role he is about to retire from.
Felling techniques
After a
discussion about tools and safety, we headed out into the
trees. We talked about the reasons for thinning. Then it was time for a
demonstration of some felling techniques, including safe removal of
lower branches, and directional felling of both small and larger trees.
The distinction is that smaller trees generally can be felled with one
cut, without taking out a scarf or wedge-shaped piece.
We discussed the importance of assessing the tree lean, tree size and
crown weight, and prevailing wind direction before starting work. Dave
felled several trees as a demonstration, and then branch members had a
chance to put their skills to the test.
Needless to say, the best way to learn how to thin well, which includes
tree selection and accurate directional felling, is to get out there
and get lots of practice, preferably under the supervision of an expert
like Dave Gratton.
Later on in the day we looked at an area which had been damaged by the
recent wind storms in the region, and talked about options and
techniques for safe salvage of wind-thrown trees. A highlight of the
day was a prize draw for some high-vis fleeces and T-shirts kindly
donated by ACC.
Read the literature
The field day was extremely valuable for everyone who
attended, and
Dave had also prepared a folder for people to take away. There is
plenty of good literature about safe chainsaw use, chainsaw techniques,
and good working practices. Examples include ACC Forest Safety Guidance
leaflets −
The whole leaflet series is
here
In addition there are the OSH/Dept of Labour booklets −
Tools for thinning
- A chainsaw, maintained in good working order with a correctly
sharpened and fitted chain, air filter clean, chain brake working, stop
lever working and spark arrester in place.
- A felling wedge and hammer a felling lever and not forgetting a
full
fuel can and oil can filled.
- Personal safety equipment.
- Safety chaps or safety trousers, a helmet with visor or safety
glasses, ear muffs, steel toe-capped boots, a first aid kit and a cell
phone.
- OSH also advocate the use of hi-vis clothing while working in the
forest. Anyone working in the forest should also ensure they
keep well hydrated. Drink plenty of water throughout the day, and take
regular rests, especially if you are a weekend warrior, and not used to
long stints of manual labour.
- Many Wellington Branch members are big fans of Levin
Sawmakers who supply a full range of competitively priced
quality tools and forestry safety gear.
Key safety messages
- Check that there are no other people in the area where you are
working. In Dave’s case, this includes the use of hazard warning tape
across roads within his forest because the public walk through his
property from time to time.
- Make sure other fellers are working at least two tree lengths
away.
- Always have a safe escape route planned and cleared to the sides
and
rear of where you are felling.
- Check overhead before you start on hung-up branches.
- Avoid using a chainsaw above shoulder height, and never use one
directly in front of your face or body in case it kicks back.
The ACC website also has:
Preventing
Injuries on the farm
Industry specific safety:
Forestry
Industry specific safety:
Agriculture
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