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LECTURE ?: WORKSPACES AND SEATING DESIGN - Coggle Diagram
LECTURE ?: WORKSPACES AND SEATING DESIGN
PROBLEMS WITH WORKSPACES
Leads to neck ache, back ache, issues with lumbar region of spine
Largely due to static seating
POSTURES
Sitting forward - supported by arms, musculatre stressed
Intermediate - in equilibrium
Rearward seating position - very relaxed, can be ok if supported
ADJUSTING TO CORRECT POSITION
Seat height - feet flat on floor and knees at 90 angle
Arm rests - should be at the correct height to support your arms when working close to the edge of the desk
Seat depth - adjust dependent on leg length
Tilting - good for micro adjustments to release built up pressure
Reclining - Useful for those suffering with backpain
Backrest height - to ensure lumbar support is at the correct height
Lumbar support - can be adjusted for height depth and firmness on chairs with adjustable support
Seat cushions - provide pelvic support, especially for those who have had surgery
DESIGN OF CHAIR
Fabric for seat, needs to be breathable, flexible and easy to clean - this is why woven plastics are often used
Casters - mainly influenced by the type of surface the chair will be on eg hard wheel casters for carpet and soft wheel casters for hard floor
ERGONOMIC CHAIR CHECKLIST
Suitable castors
Chair swivels
Backrest supports inward curve of lower back
Backrest adjustable for height and angle
Appropriate chair height
No pressure on the back of the legs and feet flat on the floor
Adjustable from the sitting position
Breathable fabric
WORKSTATION DESIGN
Zone of convenient reach - placement of work objects so they are reachable without having to lean forward depending on forward reach distance (r) and vertical distance between shoulder and work object ZCR^2 = r^2 - d^2
WORKSTATION DESIGN CHECKLIST
Height of keyboard spacebar >2.5 inches above desk
Forearm at angle of 90 - 100, upper arm vertical, wrist is relaxed (not bent) and using wrist rests if required
Text entry = keyboard in front, data entry = keyboard in front of keying hand
Top of screen = eye level
Viewing distance 18 - 24 inches
No glare / shadows on screen
Sharp images on screen, no flickering
Using laptops causes curvature of shoulders, to combat this use separate mouse and keyboard with your laptop on a stand