- Chainsaw safety clothing
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Main article: Chainsaws
A man cutting while wearing helmet, goggles, ear defenders, gloves, chaps, and boots
Regulations generally recommend that chainsaw users wear protective clothing, also known as Personal Protective Equipment or PPE, while operating chainsaws.[1][2] There is general agreement worldwide on what clothing is suitable, but local jurisdictions have specific rules and recommendations.
Contents
Clothing
Helmet, Visor and Ear DefendersHelmet
The helmet attempts to protect the user's head against impact with the cutter bar of the chainsaw should a kickback occur. This can only be successful if the chain brake has operated to stop the cutter chain. A chain running at full speed easily cuts the helmet. A helmet also protects against impacts from small falling objects, such as a dead branch from a tree being felled.[3]
The image shows a helmet which integrates visor and ear defenders into one unit. This is a very popular arrangement with chainsaw users.
In the EU, the helmet should meet the requirements of EN397.[1]
Visor or goggles
A visor or goggles reduce the chance of chips penetrating the user's eyes.
The relatively flimsy mesh visor, with imperfect coverage of the face, is considered acceptable because the chips produced by chainsaws are of relatively uniform size and speed. Unlike other woodworking tools, a chainsaw produces little or no sawdust, only chips. The chips are too large to fit through the visor's mesh.
Some chainsaw users prefer conventional safety glasses or goggles.[2] The choice may depend on the environment. The visor provides better ventilation for hard work in hot weather. Often, both safety goggles and a visor are employed for superior protection.
In the EU, a visor must comply with EN1731, or glasses must comply with EN166.[1]
Ear defenders
Ear defenders and ear plugs attenuate noise to levels that cause little or no damage to the user's hearing.[3][2] The chainsaw is very loud, typically 115 dB.
In the EU, ear defenders must comply with EN352-1.[1]
Trousers
Special fabrics have been developed for chainsaw clothing, and this development is still very active. Conventional fabric is useless at protecting against a running chainsaw, being immediately cut through.
There is a real struggle between making a fabric proof against more violent impact, and making it light, flexible and comfortable enough for the user. Clothes which make the user too hot, or which prevent the user moving easily, are a safety problem in themselves. A worker suffering from heat exhaustion is not safe. Extra fabric layers can be added to clothing to improve cut resistance, but clothes which cannot be cut at all by a powerful saw are impractical, even with modern fibres. What is worse, saw and chain technology seems to be outstripping fabric technology. High power saws with aggressively cutting chains are almost impossible to protect against.
A classification scheme has been developed in the EU to rate trousers, and fabric in general, for protection against cutting.
Chainsaw Fabric Classification Class Max chain speed 0 16 metres per second (36 mph) (3150 feet per minute) 1 20 metres per second (45 mph) (3937 feet per minute) 2 24 metres per second (54 mph) (4724 feet per minute) 3 28 metres per second (63 mph) (5512 feet per minute) The chain speed is specified in the manual for a chainsaw. Higher class trousers cost more and are heavier, so there is an advantage to choosing the trousers to match the saw.
There are two standard types of trousers, type A and type C. Type A protects only the front of the legs, and can be supplied as chaps, worn over conventional work clothes, or as conventional trousers. Type C gives protection all round the legs and are almost always worn as ordinary trousers, not over another garment. Chaps are generally used for occasional, farm or homeowner applications. [4]Professional chainsaw operators would choose trousers for comfort and ease of movement, with fallers, ground workers and firewood cutters opting for class A trousers because of the low risk of being cut in the back of the leg. Climbers and tree surgeons would have to wear type C, as they will be cutting from a wider variety of positions. Type C trousers are, of course, highly insulating, and may lead to heat stress if worn for labour intensive operations such as firewood cutting.
Chainsaw protective fabric works on a number of principles. The outermost layer can be made both tough and slippery, to protect against trivial damage which could compromise the filler material. Beneath this, long, loose fibres of ballistic nylon or Kevlar are laid in layers. When a saw contacts the trousers, the outer layer is immediately cut through but the nylon or Kevlar is drawn out and wraps around the saw's drive sprocket, locking it solid and halting the chain, limiting damage to the operator's leg. After stopping a saw, the trousers are scrapped, and the saw must be field-stripped to remove the fibres and allow it to run again.
Chainsaw protective trousers in the EU must comply with EN381-5.[1]
Gloves
Chainsaw gloves.
Note that only the back of the left hand glove contains chainsaw protective fabric, and so only that glove carries the chainsaw label.Chainsaw gloves have cut-proof fabric protection like that for trousers, but only on the back of the left hand. It's especially important that work gloves are flexible, which limits how much padding they can have. Experience has shown that most chainsaw injuries to the hands occur on the back of the left hand.
In the EU, chainsaw gloves must comply with EN381-7.[1][2]
Boots
Chainsaw boots are based on ordinary steel-toe boots, but have layers of chainsaw protective fabric on the exposed front surfaces. They are available in lace-up leather or rubber wellington boot versions. Popular manufacturers of chainsaw boots sold in Europe include Haix, Klima-Air, Meindel and Oregon.
In the EU, chainsaw boots must comply with EN345-2.[citation needed] These boots must be to the appropriate EN20345 standard for general safety footwear[2] and must also be distinctively marked as suitable for chainsaw use, according to EN381-3[1]
Protective chainsaw gaiters to EN381-9 over general steel-toe boots are acceptable for occasional users.[1]
Chainsaw logo
Logo for fabricIn the EU, chainsaw trousers, boots and gloves (the items containing chainsaw protective fabric) must carry a special chainsaw logo.[2] This shows that the fabric is of a type tested to protect properly, and also shows the class of protection, the rated maximum chain speed.
Additional Personal Protective Equipment (PPE)
First aid kit
In the UK, workers are required to carry a first aid kit containing at least a large wound dressing.[5][2]
Whistle
In the UK, workers are recommended to carry a whistle to call for help if they are injured. Colleagues may be close by, but unable to hear over the noise of chainsaw(s) still running. The whistle tends to overcome this.[6]
See also
- Chainsaw safety features
- Protective clothing
References
- ^ a b c d e f g h "Chainsaws at work" (PDF). HSE. 2006. p. 5. http://www.hse.gov.uk/pubns/indg317.pdf.
- ^ a b c d e f g Arboriculture and Forestry Advisory Group. "Using petrol driven chainsaws" (PDF). HSE. AFAG 301. http://www.hse.gov.uk/pubns/afag301.pdf.
- ^ a b "Chain Saw Safety Manual". Stihl. 1999. p. 6. http://www.stihl.co.uk/pdf/chainsaw.pdf.
- ^ Type A or Type C chainsaw trousers?
- ^ HSE, Chainsaws at work, p. 6
- ^ HSE, Chainsaws at work, p. 6
Categories:- Chainsaws
- Logging
- Safety clothing
- Survival skills
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