Page 4 - GAP Green Action Plan

OPERATOR ACTIONS
Measuring the vibration levels absorbed by the operator of power tools is not an exact science. It
is important to note there are varying elements that can e‡ect the vibration absorption rate of
an individual, with each operator experiencing di‡erent levels of vibration for identical
scenarios. Factors such as muscle mass, circulation, terrain, weather and even stress
can alter the intensity of vibratory energy experienced by an operators body.
EMPLOYER ACTIONS
1. Change working processes: Quite simply, the easiest way to control the
dangers of HAVS is to eliminate and minimise the requirement of using
vibratory power tools altogether. For example, can an excavator with a
breaker attachment be used rather than roadworkers using handheld
breakers? Can remote control technology be used to remove HAV risks?
2. Plan tool use schedules: Site managers can plan working schedules
using vibratory tools over longer periods of time, allowing for shorter
working intervals using the tools to avoid periods of prolonged use. This
allows the blood circulation to return to the soft tissue in the hands.
3. Hire low vibration tools: When it comes to HAVS, and ultimately peoples
safety, invest in options such as Active Vibration Reduction (AVR) by Hilti or
Makita’s AVT (Anti-Vibration Technology). Not only will these tools greatly
reduce the dangers of HAVS, these models boost onsite productivity as sta‡
can operate tools for longer periods before ELA or AVL values are reached.
4. Keep your tools maintained: It is vital that vibratory power tools are serviced
regularly to ensure that all components work e’ciently, there are no loose parts and
tools are well lubricated. All power tools eventually succumb to wear and tear, and tools
in poor condition can vibrate excessively higher than normal levels.
5. Make sta­ welfare a priority: Ensuring that sta‡ have suitable clothing and welfare options, such
as GAP’s AutoHybrid Welfare Units, is essential for keeping sta‡ warm and dry. Cold, wet hands is the primary
defining danger for an operator for the onset of HAVS. When the body and limbs get cold, blood is diverted to
the core to heat vital organs, resulting in a loss of temperature and blood circulation to the fingers and hands. If
the nerves and blood vessels are expossed to vibration in this state, the damage inflicted will greatly increase.
1. Get the gloves on: Keeping the hands warm and dry is essential for healthy blood circulation to the hands
and fingers. Gloves also act as a dampener between the tool and the hands, reducing the vibratory
energy absorbed by the hands. Not to be used as a permanent HAVS reducing solution.
2. Take regular intervals when using tools: Introducing breaks when using vibratory
power tools allows time for blood circulation to return to the hands and fingers.
Prolonged exposure to HAVS will increase the intensity of damage done to blood
vessels and nerves due to a lack of circulation caused by continous use. Set
intervals when using tools by performing other tasks free of vibration.
3. Select the right tool for the job: With many tools capable of drilling, cutting
and grinding varying materials, it is important to select the tool most suited to
the task, especially when working for prolonged periods. For example,
using a demolition hammer over a combination hammer, or a cut o‡ saw
over an angle grinder, will provide a more smoother finish, resulting in
reduced working times, and thus reducing exposure. Selecting a larger,
more powerful tool also helps reduce time and the vibration experienced.
4. Get the form right: When using vibratory tools the operators stance
and grip is critical to safe working. If the operator is overstretched, the tool
is overhead or compressed close the body, this is not only a slip danger, it
makes the stance rigid. This results in tension on the muscles, making them
more susceptible to vibration damage. Applying excess force to a tool, such
as pressing down on a road breaker, puts excess stress on the tool which will
increase vibration. Locking the arms or legs can often put stress on the joints
and nerves, causing issues such as carpol tunnel syndrome. Overgripping tools
puts muscle under tension, making them more susceptible to vibration damage.
Just remember, keep a relatively relaxed grip and let the tool do the work!
5. Keep it sharp: Using blunt or poor quality blades and drill bits can increase vibration
levels significantly. Blunt blades and drill bits increase the size of physical contact between
the tool and material, putting further pressure on the tool to work harder, and longer, which
increases vibration. Higher grade diamond blades and attachments will be made with better quality
materials, giving a cleaner, faster result. Ensure blades are installed facing the direction specified by the tool.
6. Look after your body: Smoking and drinking alcohol in excess restricts blood circulation and makes the
dangers of vibration more likely. By giving up smoking and drinking less you will reduce the risks of HAVS.