Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-54 - Safety standards-Logging operations › Section 296-54-99015 - Appendix 6-Sample chain shot training program

Current through Register Vol. 24-14, July 15, 2024
"Chain Shot" Awareness and Prevention
				Training
Employee __________________ Trainer ____________________ Date
				____________
All employees who operate or work around or perform main- "
				Employees should stay clear of the shot cone zone. tenance and/or repair of any
				kind of machinery equipped with a hydraulic powered bar saw must receive "chain
				shot" awareness training appropriate to their job.
Note: Employers who have employees who are potentially
				exposed to the chain shot but do not operate, inspect, or maintain the
				equipment can limit training to the information in Section 1.
[] Indicates that the employee has received training.
[]
Section 1 General information
* Chain shot is the high velocity separation and ejection of a
				piece or pieces of cutting chain from the end of a broken chain in mechanized
				timber harvesting/processing. Chain shot exposes both machine operators and
				bystanders to a risk of serious injury or death. Chain shot typically occurs
				near the drive end of the cutting system but can also come from the bar tip
				area.
* A chain shot consists of two breaks in a chain. First, the
				loop of chain breaks and forms two ends. One end moves past the drive sprocket
				or bar nose and is rapidly accelerated due to a whip-like motion of the chain
				end. The "whip action" causes the second break releasing small parts at
				extremely high speed.
* The "shot cone zone" is the area along the plane of the guide
				bar where pieces of a broken chain usually travel unless pieces are deflected.
				The SCZ angles out approximately at a 15 degree angle on both sides of the
				guide bar and a distance that possibly exceeds 250 feet.
* Employees should stay clear of the shot cone zone.
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Section 2 Cutting system inspection
The cutting system must be inspected before initial use during
				each work shift. Defective parts that would make the cutting system unsafe to
				operate, must be replaced or repaired before the cutting system is placed in
				service. Report unsafe conditions to your supervisor
Inspections must include:
* The lubrication system for leaks or damage.
* The chain for cracks or worn/damaged parts.
* The bar for wear and straightness and ensure the tip is
				properly secured.
* The sprocket.
* The chain catcher if equipped.
* The chain shot guard if equipped.
[]
Section 3 Cutting system maintenance
* Sharpen, assemble and repair chains in accordance with the
				manufacturer's specifications.
* Maintain proper bar and chain lubrication, making sure to use
				the right type and amount of lubricant.
* Replace the drive sprocket when it has excessivewear.
* Clean guide bar grooves and oil port holes regularly.
* Guidebars should be flipped regularly to ensure even
				wear.
[]
Section 4 Cutting system operation
* The operator and other persons should be kept clear of the
				shot cone zone.
* Follow chain manufacturer's recommendations for chain speed.
				"Boosting" or exceeding the recommended chain speed is prohibited.
* Maintain proper chain tension.