EditablePowerPoint Slides for Lecturers By Phil Hughes MBE and Ed Ferrett By Phil Hughes MBE and Ed Ferrett

Physical and psychological health hazards and control C hapter 15

After reading this chapter you should be able to: 1.Identify work processes and practices that may give rise to musculoskeletal health problems (in particular work-related upper limb disorders – WRULD) and suggest practical control measures 2. Identify common welfare and work environment requirements in the workplace 3. Describe the health effects associated with exposure to noise and suggest appropriate control measures 4.Describe the health effects associated with exposure to vibration and suggest appropriate control measures 5.Describe the principal health effects associated with heat, ionising and non-ionising radiation and outline basic protection techniques 6.Explain the causes and effects of stress at work and suggest appropriate control actions 7.Describe the situations that present a risk of violence towards employees and suggest ways of minimizing such risk 8.Describe the effects on health and safety of alcohol and drugs and outline control actions. Physical and psychological health hazards and control

Figure 15.1 Workstation ergonomic design improvements After (a high chair could also be provided) Before

Figure 15.2 Poor workstation layout may cause WRULD

Figure 15.3 Injuries which can be caused by hand-arm vibration

Figure 15.4 Mounted breaker to reduce vibration for the operator

Figure Vibrating Roller

Figure 15.6 Workstation design

Figure 15.7 Well lit workplace

Figure 15.8 Better to control noise at source rather than wear ear protection

Figure 9 Passage of sound waves (a)The ear with cochlea uncoiled and (b) summary of transmission

Figure and Table 15.6 Typical ear protection zone signs and sound pressure levels

Table 15.7 Need for a noise assessment

Figure Noise paths found in a workplace (a) The quiet area is subjected to reflected noise from a machine somewhere else in the building (b) The correct use of absorption in the roof will reduce the reflected noise reaching the quiet area (c) Segregation of the noisy operation will benefit the whole workplace

Figure Heat equation

Figure Ionizing Radiation warning signs The IAEA Ionizing Radiation warning symbol –ISO Recently introduced The radiation hazard symbol

Figure A Class 4 laser setup for defeatable access control for properly trained persons

Figure Specialized eye protection for work with lasers

Figure Security coded access and surveillance CCTV

Typical noise assessment record