Hand Tool Use and Selection Guidance in Construction - PowerPoint PPT Presentation

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Hand Tool Use and Selection Guidance in Construction

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Hand Tool Use and Selection Guidance in Construction Adapted from a presentation developed by Washington State Department of Labor & Industries, Division of ... – PowerPoint PPT presentation

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Title: Hand Tool Use and Selection Guidance in Construction


1
Hand Tool Use and SelectionGuidance in
Construction
Adapted from a presentation developed by
Washington State Department of Labor
Industries, Division of Occupational Safety and
Health
2
  • Overview
  • The hands and wrists are made up of a variety of
    fragile bones, nerves, blood vessels, tendons and
    ligaments that can be easily damaged if they are
    misused.

3
  • The following are some of the conditions that can
    cause hand and wrist illnesses
  • Frequent or repetitive movement of the hand or
    wrist, usually associated with awkward wrist
    angles
  • Inappropriate tool and equipment design
  • Vibrating tools
  • Poor work station design and arrangement
  • Cold environments

4
Things to consider when using and selecting hand
tools
  • 1. Design tasks and select tools to reduce
    extreme flexion or deviation of the wrist
  • 2. Bend the tool, not the wrist
  • 3. User lower weight tools or reduce the weight
    of the tool

5
4. Dont raise or extend elbows with heavy tools
6
  • 5. Avoid stress on pressure points
  • Stress concentrations result from poorly designed
    tool handles or handle areas that exert pressure
    on the palms or fingers.

7
  • 6. Reduce grip force requirements
  • Make sure the tool handle or grip area is the
    right size for your hand.
  • 7. Evaluate grip surface
  • Look for cushioned, padded, non-slip and
    anti-vibration handle materials.

8
  • 8. Use a power grip
  • Design tasks so that a power rather than a pinch
    grip can be used to grasp materials.
  • A pinch grip is five times more stressful than a
    power grip.
  • The greater the effort to maintain control of a
    hand tool, the higher the potential for injury.

9
  • 9. Avoid repetitive trigger-finger actions
  • Trigger-finger happens when one of your fingers
    or your thumb catches in a bent position. The
    finger or thumb may straighten with a snap.
  • Its caused by the narrowing of the tendon sheath
    when repetitive gripping actions are performed.

10
  • (Continue - Avoid repetitive trigger-finger
    actions)
  • Tendons in the finger joints can swell due to
    overuse, locking the finger into a fixed
    position.
  • Select triggers that allow two or three fingers
    to activate.

11
  • 9. Isolate hands from heat and cold
  • Heat and cold can cause loss of manual dexterity
    and increased grip strength requirements.
  • Due to developments in glove materials many are
    less bulky and provide better protection.

12
  • 10. Isolate hands from vibration
  • Excessive vibration can cause reduced blood
    circulation and cause white-finger syndrome.

White-finger syndrome
Anti-vibration gloves
13
  • Thank you for taking the time to learn about
    safety and health and how to prevent injuries and
    illnesses.
  • To learn more about ways to protect your hands,
    visit www.choosehandsafety.org
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