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Computer Workstation Ergonomics: 

Computer Workstation Ergonomics

Alan L. Bowen Risk Control Specialist Mississippi Municipal Service Company Post Office Box 2987 Jackson, MS 39207 601-355-8581 800-898-1032 Fax 601-355-8584 www.msmsc.com: 

Alan L. Bowen Risk Control Specialist Mississippi Municipal Service Company Post Office Box 2987 Jackson, MS 39207 601-355-8581 800-898-1032 Fax 601-355-8584 www.msmsc.com

Computer Workstation Ergonomics: 

Computer Workstation Ergonomics Chair Keyboard Mouse Monitor Document Holder Working Surfaces Lighting Work Periods

CHAIR: 

Seat Height Adjustable (16” – 20”) Thigh level with floor Tilt forward Hips & Knees - 90º or more angle () Feet flat on floor Clearance behind knees CHAIR

Chair Dimensions: 

Chair Dimensions

Seat Pan: 

Waterfall front Padded 2” thick CHAIR Seat Pan

Backrest: 

Lower back support 12”x12” with 4”-8” vertical adjustment CHAIR Backrest

Armrests: 

Removed Below elbow height Padded Elbows close to body CHAIR Armrests

Base: 

Five (5) legs Castered (wheels) CHAIR Base

Footrests: 

Not needed with proper chair height 2” minimum CHAIR Footrests

Keyboard Tray: 

Sturdy construction Adjustable height (23”-28”) Forearms, wrists, & hands in straight line (parallel) to the floor KEYBOARD Keyboard Tray

Keyboard Flat: 

Keyboard & tray parallel with floor Do not use props KEYBOARD Keyboard Flat

Wrist Rests: 

Supplied in front of keyboard Smooth padded surface Rounded edges KEYBOARD Wrist Rests

Mouse Placement: 

Input devices next to keyboard Dominant-hand side Mouse Mouse Placement

Wrist Rests: 

Mouse pad with wrist rest Smooth padded surface Rounded edges Mouse Wrist Rests

Computer Monitor: 

Monitor Height Top of screen at or below eye level Monitor Placement Directly in front Between the “G” & “H” Arm’s length away (15” – 30”) Computer Monitor

Document Holder: 

Document Placement Close to computer screen Same height & distance Document Holder

Working Surfaces: 

Adjustable All workstation surfaces should be adjustable Size 30” x 30” minimum (48”x48” preferably) Writing Surfaces Non-Keyboard Adjustable – 27.5” – 31” Fixed – 29.5” Working Surfaces

Working Surfaces: 

Reach Distance Circular arrangement Normal extended reach distance <22.5” Working Surfaces

Working Surfaces: 

Working Surfaces

Working Surfaces: 

Working Surfaces

Lighting: 

Indirect Lighting Minimize direct lighting Reduce glare Angle monitor away from light source Perpendicular to floor Lighting

Lighting: 

Lighting

Lighting: 

Lighting

Lighting: 

Ambient Illumination Dimmer overhead lighting Monitor brighter Use window shades Additional Lighting Task lighting Lighting

Work Periods: 

Work Duration Long periods of activity without change Repetitive – excessive movement Static – no movement Rest muscles & joints Alternate work activities Work Periods

Work Periods: 

Work Breaks Breaks every 45 minutes to 1 hour Mini-breaks = 2-5 minutes Non-keyboard tasks or rest Work Periods

Diagram: 

Computer Workstation Ergonomics Diagram

Mississippi Municipal Service Company Post Office Box 2987 Jackson, MS 39207 601-355-8581 800-898-1032 Fax 601-355-8584 www.msmsc.com: 

Mississippi Municipal Service Company Post Office Box 2987 Jackson, MS 39207 601-355-8581 800-898-1032 Fax 601-355-8584 www.msmsc.com