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pter 1 Design Guidelines ChecklistsVersion 3.2.1
Horizontal Work Reach Criteria Checklist ............................................. 3 Seated Workstation Criteria Checklist................................................... 4 Standing Workstation Criteria Checklist ................................................ 6 Sitting Strength Criteria Checklist ......................................................... 8 Standing Strength Criteria Checklist ..................................................... 9 Grip and Hand Strength Criteria Checklist .......................................... 10 Tool Design and Selection Criteria Checklist ...................................... 12 Material Handling Criteria Checklist .................................................... 14 Machine Clearances and Maintenance Criteria Checklist .................... 15 Platforms, Ladders, and Stairs Criteria Checklist ................................ 18 Screens, Controls, and Gauges Criteria Checklist............................... 20 Environment Criteria Checklist............................................................ 22
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Des ign Gu ide l ines Check l i s ts
2© 2007 Humantech
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Horizontal Work Reach Criteria Checklist
Job Name: ___________________________________________________________________
Date: _________________________________ Station: ____________________________
Site: _________________________________ Shift: ______________________________
Dept: _________________________________ Product: ___________________________
Criteria Dimension Measured Acceptable?
A. Normal Reach Max. 12" (30 cm) _________________ Yes No
B. Extended Reach Max. 18" (46 cm) _________________ Yes No
C. Work Distance 1" – 4" (2.5 – 10 cm) _________________ Yes No
D. Normal Reach Width Max. 40" (102 cm) _________________ Yes No
E. Extended Reach Width Max. 60" (152 cm) _________________ Yes No
All values derived from North American populations.
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4© 2007 Humantech
Seated Workstation Criteria Checklist
Job Name: ___________________________________________________________________
Date: _________________________________ Station: ____________________________
Site: _________________________________ Shift: ______________________________
Dept: _________________________________ Product: ___________________________
Criteria Dimension Measured Acceptable?
Work Surface Dimensions
A. Work Height – Hands
Light Work Adj. 22" – 31"(56 – 79 cm) _______________ Yes No
Data Entry Adj. 25" – 34"
(63 – 87 cm) _______________ Yes No
Precision Work Adj. 27" – 36"(68 – 91 cm)
_______________ Yes No
B. Display Height Pref. Adj. 27" – 33"(69 – 84 cm)Fixed: 27" (69 cm) _______________ Yes No
C. Work Surface Thickness Max. 2" (5 cm) _______________ Yes No
D. Knee Space Depth Min. 18" (46 cm) _______________ Yes No
E. Knee Well Width Pref. 24" (61 cm)Min. 21" (53 cm) _______________ Yes No
F. Thigh Clearance Min. 8" (20 cm) _______________ Yes No
G. Distance to Work 1" – 4" (2.5 – 10 cm) _______________ Yes No
H. Foot Space Depth Min. 6" (15 cm) _______________ Yes No
I. Distance to Rear of Foot Clearance
Min. 24" (61 cm) _______________ Yes No
J. Foot Space Height Min. 6" (15 cm) _______________ Yes No
Horizontal Work Reach Dimensions
A. Normal Reach Max. 12" (30 cm) _______________ Yes No
B. Extended Reach Max. 18" (46 cm) _______________ Yes No
C. Work Distance 1" – 4" (2.5 – 10 cm) _______________ Yes No
D. Normal Reach Width Max. 40" (102 cm) _______________ Yes No
E. Extended Reach Width Max. 60" (152 cm) _______________ Yes No
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Seated Workstation Criteria Checklist (cont.)
Criteria Dimension Measured Acceptable?
Other Seated Workstation Criteria
Seat Pan Height 15" – 33" (38 – 84 cm) _______________ Yes No
Head Clearance 39" (99 cm) from seat pan _______________ Yes No
Top of Monitor 27" - 33" (69 – 84 cm)from seat pan _______________ Yes No
Wrist Rest Soft, compressiblematerial
N/A Yes No
Footrest Adjustable height, angle N/A Yes No
Seated Workstation Dimensions
Horizontal Work Reach Dimensions
All values derived from North American populations.
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Des ign Gu ide l ines Check l i s ts
6© 2007 Humantech
Standing Workstation Criteria Checklist
Job Name: ___________________________________________________________________
Date: _________________________________ Station: ____________________________
Site: _________________________________ Shift: ______________________________
Dept: _________________________________ Product: ___________________________
Criteria Dimension Measured Acceptable?
Work Surface Dimensions
A. Work Height – Hands
Precision Work Adj. 37" – 50"(94 – 127 cm) _________________ Yes No
Light Assembly Adj. 33" – 42"(84 – 107 cm) _________________ Yes No
Heavy Work Adj. 28" – 39"(71 – 99 cm) _________________ Yes No
B. Rounded Edges .8" (2 cm) radius _________________ Yes No
C. Foot rail height 6" (15 cm) _________________ Yes No
D. Knee Clearance Min. 5" (13 cm) _________________ Yes No
E. Foot Clearance Height Min. 6" (15 cm) _________________ Yes No
F. Foot Clearance Depth Min. 6" (15 cm) _________________ Yes No
G. Display Height Pref. Adj. 57" – 70"(145 – 178 cm)
Fixed: 70" (178 cm) _________________ Yes No
Horizontal Work Reach Dimensions
A. Normal Reach Max. 12" (30 cm) _________________ Yes No
B. Extended Reach Max. 18" (46 cm) _________________ Yes No
C. Work Distance 1" – 4" (2.5 – 10 cm) _________________ Yes No
D. Normal Reach Width Max. 40" (102 cm) _________________ Yes No
E. Extended Reach Width Max. 60" (152 cm) _________________ Yes No
Other Standing Workstation CriteriaHead Clearance Min. 80" (203 cm) _________________ Yes No
Horizontal Viewing Area 15° to either side of workarea _________________ Yes No
Normal Line of Sight 15° below horizontal plane _________________ Yes No
Optimum Viewing + 15° from normal line of sight _________________ Yes No
Anti-fatigue Matting Min. .5" (1.3 cm) thickness _________________ Yes No
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Standing Workstation Dimensions
Horizontal Work Reach Dimensions
All values derived from North American populations.
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Des ign Gu ide l ines Check l i s ts
8© 2007 Humantech
Sitting Strength Criteria Checklist
Job Name: ___________________________________________________________________
Date: _________________________________ Station: ____________________________
Site: _________________________________ Shift: ______________________________
Dept: _________________________________ Product: ___________________________
Criteria Dimension Measured Acceptable?
A. Push out (1 arm) – near
Infrequent Max. 21 lb (10 kg) _________________ Yes No
Repetitive Max. 4 lb (2 kg) _________________ Yes No
B. Push out (1 arm) – far
Infrequent Max. 32 lb (15 kg) _________________ Yes No
Repetitive Max. 6 lb (3 kg) _________________ Yes No
C. Pull in (1 arm) – near Infrequent Max. 16 lb (7 kg) _________________ Yes No
Repetitive Max. 3 lb (1.4 kg) _________________ Yes No
D. Pull in (1 arm) – far
Infrequent Max. 34 lb (15 kg) _________________ Yes No
Repetitive Max. 7 lb (3 kg) _________________ Yes No
E. Push up (1 arm) – near
Infrequent Max. 13 lb (6 kg) _________________ Yes No
Repetitive Max. 3 lb (1.4 kg) _________________ Yes No
F. Push up (1 arm) – far
Infrequent Max. 9 lb (4 kg) _________________ Yes NoRepetitive Max. 2 lb (0.9 kg) _________________ Yes No
G. Press down (1 arm) – near
Infrequent Max. 13 lb (6 kg) _________________ Yes No
Repetitive Max. 2 lb (0.9 kg) _________________ Yes No
H. Press down (1 arm) – far
Infrequent Max. 11 lb (5 kg) _________________ Yes No
Repetitive Max. 3 lb (1.4 kg) _________________ Yes No
Infrequent = less than 2 times per minuteRepetitive = 2 or more times per minute
All values derived from North American populations.
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Standing Strength Criteria Checklist
Job Name: ___________________________________________________________________
Date: _________________________________ Station: ____________________________
Site: _________________________________ Shift: ______________________________
Dept: _________________________________ Product: ___________________________
Criteria Dimension Measured Acceptable?
A. Push out (1 hand)
Infrequent Max. 12 lb (5 kg) _________________ Yes No
Repetitive Max. 2 lb (0.9 kg) _________________ Yes No
B. Push out (2 hands)
Infrequent Max. 38 lb (17 kg) _________________ Yes No
Repetitive Max. 8 lb (4 kg) _________________ Yes No
C. Lift up (2 hands)
Infrequent Max. 35 lb (16 kg) _________________ Yes No
Repetitive Max. 7 lb (3 kg) _________________ Yes No
D. Push down (2 hands)
Infrequent Max. 57 lb (26 kg) _________________ Yes No
Repetitive Max. 11 lb (5 kg) _________________ Yes No
E. Pull down (2 arms)
Infrequent Max. 71 lb (32 kg) _________________ Yes No
Repetitive Max. 14 lb (6 kg) _________________ Yes No
F. Pull in (2 arms)
Infrequent Max. 42 lb (19 kg) _________________ Yes No
Repetitive Max. 8 lb (4 kg) _________________ Yes No
Infrequent = less than 2 times per minuteRepetitive = 2 or more times per minute
All values derived from North American populations.
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Des ign Gu ide l ines Check l i s ts
10© 2007 Humantech
Grip and Hand Strength Criteria Checklist
Job Name: ___________________________________________________________________
Date: _________________________________ Station: ____________________________
Site: _________________________________ Shift: ______________________________
Dept: _________________________________ Product: ___________________________
Criteria Dimension Measured Acceptable?
A. Power Grip
Infrequent Max. 20 lb (9 kg) ________________ Yes No
Repetitive Max. 4 lb (1.8 kg) ________________ Yes No
B. Pinch Grip
Infrequent Max. 9 lb (4 kg) ________________ Yes NoRepetitive Max. 2 lb (0.9 kg) ________________ Yes No
C. Key Grip
Infrequent Max. 10 lb (5 kg) ________________ Yes No
Repetitive Max. 2 lb (0.9 kg) ________________ Yes No
D. Push Forward with Index Finger
Infrequent Max. 15 lb (7 kg) ________________ Yes No
Repetitive Max. 3 lb (1.4 kg) ________________ Yes No
E. Push Down with Index Finger
Infrequent Max. 15 lb (7 kg) ________________ Yes NoRepetitive Max. 3 lb (1.4 kg) ________________ Yes No
F. Push Forward with Thumb
Infrequent Max. 21 lb (9 kg) ________________ Yes No
Repetitive Max. 4 lb (2 kg) ________________ Yes No
G. Push Down with Thumb
Infrequent Max. 10 lb (5 kg) ________________ Yes No
Repetitive Max. 2 lb (0.9 kg) ________________ Yes No
H. Pull with Pinch Grip 0.1" (0.2 cm)
Infrequent Max. 10 lb (5 kg) ________________ Yes No
Repetitive Max. 2 lb (0.9 kg) ________________ Yes No
I. Pull with Pinch Grip 1.6" (4 cm)
Infrequent Max. 13 lb (6 kg) ________________ Yes No
Repetitive Max. 2.5 lb (1.2 kg) ________________ Yes No
Infrequent = less than 2 times per minuteRepetitive = 2 or more times per minute
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Grip and Hand Strength Measures (Gripping)
Grip and Hand Strength Measures (Finger and Thumb Pushing)
Grip and Hand Strength Measures (Pinch-Pull)
All values derived from North American populations.
A B C
D E G
H I
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Des ign Gu ide l ines Check l i s ts
12© 2007 Humantech
Tool Design and Selection Criteria Checklist
Job Name: ___________________________________________________________________
Date: _________________________________ Station: ____________________________
Site: _________________________________ Shift: ______________________________
Dept: _________________________________ Product: ___________________________
Criteria Dimension Measured Acceptable?
A. Handle Length
Bare Pref. 5" (13 cm)Min. 4" (10 cm) _________________ Yes No
Gloved Pref. 5.5" (14 cm)Min. 4.5" (11 cm) _________________ Yes No
B. Handle Diameter
Power Grip Pref. 1.5" (3.8 cm)Min. 1.2" (3 cm)Max. 1.8" (4.6 cm) _________________ Yes No
Precision Grip Pref. 0.4" (1 cm)Min. 0.3" (0.8 cm)Max. 0.5" (1.3 cm) _________________ Yes No
C. Handle Span Pref. 3" (7.6 cm)Min. 2" (5.1 cm)Max. 4" (10 cm)
_________________ Yes No
Tool Weight
Power Grip 2.5 lb (1.1 kg) _________________ Yes No
Precision Grip 1.0 lb (0.45 kg) _________________ Yes No
Triggers and Activation Min. 1" (2.5 cm) _________________ Yes No
Handle Surface Non-slip, compressiblematerial, no finger grooves (rubber or closed-cell foam) _________________ Yes No
Torque
Pistol Grip Tools > 60 in-lb (69 cm-kg) should have torque-limiting devices _________________ Yes No
In-Line Tools > 28 in-lb (33 cm-kg) should have torque-limiting devices _________________ Yes No
Right Angle Tools > 442 in-lb (509cm-kg) should havetorque-limiting devices _________________ Yes No
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Tool Design and Selection Criteria Checklist (cont.)
Criteria Dimension Measured Acceptable?
VibrationHandles have vibration-absorbing materials(compressible rubber or closed-cell foam)
_________________ Yes No
Accessories
Suspend hoses from above _________________ Yes No
Use lightweight hoses _________________ Yes No
Use dyna-swivel connectors _________________ Yes No
Use exhaust mufflers _________________ Yes No
Provide security handles _________________ Yes No
Preventive Maintenance
Monthly maintenance _________________ Yes No
All values derived from North American populations.
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Des ign Gu ide l ines Check l i s ts
14© 2007 Humantech
Material Handling Criteria Checklist
Job Name: ___________________________________________________________________
Date: _________________________________ Station: ____________________________
Site: _________________________________ Shift: ______________________________
Dept: _________________________________ Product: ___________________________
Criteria Dimension Measured Acceptable?
A. Comfort Zone Bottom Min. 22" (56 cm) _________________ Yes No
B. Comfort Zone Top Max. 49" (124 cm) _________________ Yes No
C. Optimal Comfort
Zone Bottom
Min. 33" (84 cm) _________________ Yes No
D. Optimal ComfortZone Top
Max. 38" (97 cm) _________________ Yes No
E. Distance From Body(to midpoint of hands)
Max. 6" (15 cm) _________________ Yes No
All values derived from North American populations.
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Machine Clearances and Maintenance Criteria Checklist
Job Name: ___________________________________________________________________
Date: _________________________________ Station: ____________________________
Site: _________________________________ Shift: ______________________________
Dept: _________________________________ Product: ___________________________
Criteria Dimension Measured Acceptable?
Standing Clearances
Width Min. 24" (61.0 cm) _________________ Yes No
Height Min. 80" (2 m) _________________ Yes No
Prone Work Clearances
Horizontal Min. 76" (193.0 cm) _________________ Yes No
Vertical 18" (45.7 cm) to32" (81.3 cm) _________________ Yes No
Horizontal Work Clearances
Horizontal 30" (76.2 cm) to96" (243.8 cm) _________________ Yes No
Vertical 18" (45.7 cm) to80" (203.2 cm) _________________ Yes No
Preventive Maintenance
Routine checkups _________________ Yes No
Keep it clean _________________ Yes No
Accessibility for Maintenance
Openings are large enough to permit access of bothhands and offer visibility of components _________________ Yes No
Access ports are located so that operators are notexposed to hot surfaces, sharp edges, or electricalcurrents _________________ Yes No
Access ports are easy to remove, with visible andaccessible cover fasteners _________________ Yes No
Circular Hatch, HorizontalClearance
Min. 30" (76.2 cm)diameter _________________ Yes No
Horizontal Hatch Clearance Min. 20" (50.8 cm)high and 24" (61.0 cm)wide
_________________ Yes No
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Des ign Gu ide l ines Check l i s ts
16© 2007 Humantech
Machine Clearances and Maintenance Criteria Checklist (cont.)
Criteria Dimension Measured Acceptable?
Safety Distances
Whole Body Reach Min. 98.5" (250.2 cm) _________________ Yes No
Arms and Hands Adequate safetydistances for fingers,hands, arms areprovided (next page) _________________ Yes No
Safety Distances for Reach of Body Parts (Corlett and Clark, 1995)
Fingertip
≥ 0.15" ≤ 0.3"(≥ 0.4 cm≤ 0.8 cm)
Aperturerectangle orgap a
Finger Hand to ball of thumb Arm
Safetydistance tohazard point b
≥ 0.6"(≥ 1.5 cm)
≥ 0.3" ≤ 0.8"(≥ 0.8 cm ≤ 2 cm)
≥ 4.7"(≥ 12 cm)
≥ 0.8" ≤ 1.2"(≥ 2 cm ≤ 3 cm)
≥ 8.0"(≥ 20 cm)
≥ 1.2" ≤ 5.3"(≥ 3 cm ≤ 13.5 cm)
≥ 33.5"(≥ 85 cm)
a
b
a
b
a
b
Safety Dimensions for Elongated Apertures with Parallel Sides(Corlett and Clark, 1995)
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Fingertip
≥ 0.15" ≤ 0.3"(≥ 0.4 cm≤ 0.8 cm)
Aperturediameter orlength of side ain. (cm)
Finger Hand to thumb root Arm
Safety distanceto hazard pointb in. (cm)
≥ 0.6"(≥ 1.5 cm)
≥ 0.2" ≤ 0.8"(≥ 0.5 cm ≤ 2 cm)
≥ 4.7"(≥ 12 cm)
≥ 0.8" ≤ 1.6"(≥ 2 cm ≤ 4.1 cm)
≥ 8"(≥ 20 cm)
≥ 1.6" ≤ 10"(≥ 4.1 cm ≤ 25.4 cm)
≥ 33.5"(≥ 85 cm)
a
b
a
b
a
b
Safety Dimensions for Square or Circular Apertures (Corlett and Clark, 1995)
All values derived from North American populations
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18© 2007 Humantech
Platforms, Ladders, and Stairs Criteria Checklist
Job Name: ___________________________________________________________________
Date: _________________________________ Station: ____________________________
Site: _________________________________ Shift: ______________________________
Dept: _________________________________ Product: ___________________________
Criteria Dimension Measured Acceptable?
Platform Deck
Deck Size 24" x 25" (61.0 x 63.5 cm) ________________ Yes No
Deck Type Suitable for work environment(stainless, chemical resistant, etc.) ________________ Yes No
Adjustability
Range of Adjustment
Min. 10" (25.4 cm) ________________ Yes No
Type of Adjustment
Powered preferred, hand cranksufficient, 3" (7.6 cm) stackables arean alternative ________________ Yes No
Ladder Criteria
Fixed Ladders See Fixed Ladders (next page) ________________ Yes No
Passage Width Min. 30" (76.2 cm) ________________ Yes No
Dist. Betw. Lad-ders, Obstructions
Min. 24" (61.0 cm) ________________ Yes No
Rung Spacing Min. 7" (17.8 cm), max. 12"(30.5 cm); must be uniform ________________ Yes No
Ladder Height Max. 20' (6.1 m) ________________ Yes No
Toe Space Min. 7" (17.8 cm) ________________ Yes No
Rung Length Min. 16" (40.6 cm) ________________ Yes No
Rung Diameter .75" - 1.5" (1.9 - 3.8 cm) ________________ Yes No
Stair Ladders See Stair Ladders (next page) ________________ Yes No
Railing Height 30" - 34" (76.2 - 86.4 cm), step to rail ________________ Yes No
RailingSpecifications
Wood: min. 2" (5.1 cm)Metal: min. 1.5" (3.8 cm)Support brackets: 8' (2.4 m) spacing
Wall clearance: min. 3" (7.6 cm) ________________ Yes NoHead Clearance 68" (172.7 cm), min. 72" (182.9 cm)
preferred ________________ Yes No
Treads 6" - 10" (15.2 - 25.4 cm), 50° angle5" - 7" (12.7 - 17.8 cm), 60° angle3" - 4" (7.6 - 10.2 cm), 75° angle
________________ Yes No
Step Spacing Min. 7" (17.8 cm), max. 12"(30.5 cm)
________________ Yes No
Surface Non-skid material ________________ Yes No
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Platforms, Ladders, and Stairs Criteria Checklist (cont.)
Criteria Dimension Measured Acceptable?
Stairs Criteria
Slope 30 - 35° optimal, max. 20 - 50° ____________ Yes No
Step Height,Tread Depth
30°: 6.5" (16.5 cm) high, 11" (27.9 cm) deep35°: 7.2" (18.3 cm) high, 10.2" (25.9 cm) deep40°: 8.0" (20.3 cm) high, 9.5" (24.1 cm) deep45°: 8.8" (22.4 cm) high, 8.8" (22.4 cm) deep50°: 9.5" (24.1 cm) high, 8.0" (20.3 cm) deep
____________ Yes No
Tread Overlap 1" - 1.5" (2.5 - 3.8 cm)
Tread Surface Non-skid material, holes in outdoor stairs
Safety Contrasting material on edge; use mattefinishes, contrasting rail colors
Fixed Ladders
NON-SKID
6" (15 cm)PREFER SAFETY GUARD
FOR TWO-WAY TRAFFICPROVIDE SEPARATESTAIR LADDERS
RISERS:7" - 12" (18 cm - 30 cm)
RAIL SPACING AND TREAD WIDTH:21" (53 cm) MIN24" (61 cm) MAX
TREAD:6" - 10" (15 cm - 25 cm)5" - 7" (13 cm - 18 cm)3" - 4" (7.6 cm - 10 cm)
STAIR ANGLE:50¡60¡75¡
RAIL DIAMETER:1.5" - 2.0" (3.8 cm - 5.1 cm)
30" - 34"(76 cm - 86 cm)
INTERMEDIATERAILS
HEAD CLEAR68" - 72"
(173 cm - 183 cm)
CEILING HEIGHT96" (244 cm)
STANDARD80" (203 cm) MIN
Stair Ladders
All values derived from North American populations.
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Des ign Gu ide l ines Check l i s ts
20© 2007 Humantech
Screens, Controls, and Gauges Criteria Checklist
Job Name: ___________________________________________________________________
Date: _________________________________ Station: ____________________________
Site: _________________________________ Shift: ______________________________
Dept: _________________________________ Product: ___________________________
Criteria Dimension Measured Acceptable?
Screens
Density 25% or less of screen area used ________________ Yes No
Grouping Group size of 14 x 7 characters ________________ Yes No
Layout Columns recommended over horizontallists ________________ Yes No
Menu Use single menu layers or options for thenext menu layer ________________ Yes No
Icons Graphics and text labels recommended ________________ Yes No
Flicker Screen refresh rate of 75 Hz or greater ________________ Yes No
Resolution Character size of .116" - .128"(.295 - .325 cm) from a distance of 18 -24" (45.7 - 61.0 cm) ________________ Yes No
Selection Contrast of 3:1, up to 8:1 recommendedwith dark letters on a white background ________________ Yes No
Location 18" - 30" (45.7 – 76.2 cm) distance fromeyes ________________ Yes No
Height Top of screen at eye level, 54" - 68"(137 – 173 cm) for standing workstations
________________ Yes No
Lighting Use 300-500 lux in areas where VDTsare used ________________ Yes No
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Screens, Controls, and Guages Criteria Checklist (cont.)
Criteria Dimension Measured Acceptable?
ControlsType Choose correct type of control for the
application ________________ Yes No
Texture Controls should have some texture todifferentiate them from each other ________________ Yes No
MotionStereotypes
Controls should be compatible withexisting stereotypes (e.g., up for "on" for light switch) ________________ Yes No
Coding andLabeling
Controls should be labeled above thecontrol with color for better identification.Use 9 or fewer different colors. ________________ Yes No
ActivationForces
Hand push buttons, knobs < 2 lb (0.9 kg)push force or .38 in-lb (1.0 cm-kg) of torque ________________ Yes No
Foot push buttons, pedals should notexceed 10 lb (4.5 kg) push force ________________ Yes No
Hand cranks, wheels, levers should notexceed 5 lb (2.3 kg) push force ________________ Yes No
Toggle switches should not exceed 2 lb(0.9 kg) push force ________________ Yes No
Placement Place controls in optimal viewing area byfrequency of use and importance ________________ Yes No
Gauges
Quantitative Digital readout or counter recommended ________________ Yes No
Qualitative Use fixed scale, moving pointer displays ________________ Yes No
StatusIndicator
Use lights with labels for most statusindicator applications ________________ Yes No
All values derived from North American populations.
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Des ign Gu ide l ines Check l i s ts
22© 2007 Humantech
Environment Criteria Checklist
Job Name: ___________________________________________________________________
Date: _________________________________ Station: ____________________________
Site: _________________________________ Shift: ______________________________
Dept: _________________________________ Product: ___________________________
Criteria Dimension Measured Acceptable?
Visual
Illumination See Recommended Range of Illuminance table (next page)
________________ Yes No
Glare Eliminate or minimize glare ________________ Yes No
Color Choose colors of uniform
reflectivity for large areas ________________ Yes No
Avoid bright colors ________________ Yes No
Divide large areas by colors togive identity to groups within it ________________ Yes No
Indicator lights follow standardcolor-coding ________________ Yes No
Auditory
Ambient Noise Levels Less than 85 dBA ________________ Yes No
Impact Noises Less than 140 dBA ________________ Yes No
Thermal
Temperature –Light Work
Between 66°F (19°C) and79°F (26°C) ________________ Yes No
Temperature –Moderate Work
Between 64°F (17°C) and74°F (23°C) ________________ Yes No
Temperature –Heavy Work
Between 60°F (16°C) and68°F (20°C) ________________ Yes No
Humidity Between 20% and 85% ________________ Yes No
Vibrational
See Characteristicsof Whole-Body andSegmental Vibration(next page)
Eliminate or minimize vibration ________________ Yes No
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Recommended Range of Illuminance(Adapted from Flynn, 1979)
Range of Illuminance*
Type of Activity or Area
Lux FootcandlesPublic areas with dark surroundings 20-50 2-5
Simple orientation for short temporary visits > 50-100 > 5-9
Working spaces where visual tasks are only occasionally performed > 100-200 > 9-19
Visual tasks of high contrast or large size: reading printed material,typed originals, handwriting in ink, good xerography; rough benchand machine work; ordinary inspection; rough assembly
> 200-500 > 19-46
Visual tasks of medium contrast or small size: reading pencil, poorlyprinted or reproduced material; medium bench and machine work;difficult inspection; medium assembly
>500-1,000
> 46-93
Visual tasks of low contrast or very small size: reading handwritingin hard pencil on poor quality paper, very poorly reproducedmaterial; very difficult inspection
> 1,000-2,000
> 93-186
Visual tasks of low contrast and very small size over a prolongedperiod: fine assembly, high difficult inspection, fine bench andmachine work
> 2000-5000
> 186-464
Very long and exacting visual tasks: the most difficult inspection,extra fine bench and machine work, extra fine assembly
> 5000-10000
> 464-929
Very special visual tasks of extremely low contrast and small size:some surgical procedures
> 10000-20000
> 929-1858
*The choice of a value within the range depends on task variables, reflectance of theenvironment, and the individual's visual capabilities.
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Des ign Gu ide l ines Check l i s ts
Characteristics of Whole-Body and Segmental Vibration Within a Rangeof Safe Transmission
Duration Frequency Range (Hz)
Upper Limit of
Acceleration (m/s
2
)Whole-Body Vibration
1 2.5
4 - 8 1.5
1 hour
80 10
1 0.7
4 - 8 0.3
8 hours
80 3.5
Segmental Vibration
8 - 15 60
80 400
30 minutes
250 1,250
8 - 15 15
80 60
4 to 8 hours
250 200
All values derived from North American populations.