Metric Handbook, Third Edition by David Littlefield, Pamela Buxton PDF

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Extra info for Metric Handbook, Third Edition

Example text

It is therefore more important that design allows for elderly people where that is appropriate, accepting that younger people may be slightly disadvantaged. Table VI gives dimensions for people between the ages of 65 and 80. Table II Dimensions of British adults Men Percentiles Women Percentiles 50th 50th 95th 50th 50th 95th 1625 1740 1855 1505 1610 1710 1515 1315 1005 690 1925 1630 1425 1090 755 2060 1745 1535 1180 825 2190 1405 1215 930 660 1790 1505 1310 1005 720 1905 1610 1405 1085 780 2020 Sitting 7 Height above seat level 8 Eye height above seat level 9 Shoulder height above seat level 10 Length from elbow to fingertip 11 Elbow above seal level 12 Thigh clearance 13 Top of knees, height above floor 14 Popliteal height 15 Front of abdomen to front of knees 850 735 540 440 195 135 490 395 253 910 790 595 475 245 160 545 440 325 965 845 645 510 295 185 595 490 395 795 685 505 400 185 125 455 355 245 850 740 555 430 235 155 500 400 315 910 795 610 460 280 180 540 445 385 16 Buttock – popliteal length 17 Rear of buttocks to front of knees 440 540 495 595 550 645 435 520 480 570 530 620 18 Extended leg length 19 Seat width 985 310 1070 360 1160 405 875 310 965 370 1055 435 720 1655 865 420 215 220 780 1790 945 465 250 270 835 1925 1020 510 285 320 650 1490 780 355 210 205 705 1605 850 395 250 255 755 1725 920 435 295 305 Standing 1 Stature 2 Eye height 3 Shoulder height 4 Elbow height 5 Hand (knuckle) height 6 Reach upwards Sitting and standing 20 Forward grip reach 21 Fingertip span 22 Width over elbows skimbo 23 Shoulder width 24 Chest or bust depth 25 Abdominal depth 95th: minimum floor to roof clearance; allow for shoes and headgear in appropriate situations 50th: height of visual devices, notices, etc.

07 Maintenance Buildings and the services and plant therein need constant maintenance. Something frequently forgotten is the need for easy access to certain areas. It is reasonable to assume that people employed on maintenance work will be sufficiently agile and not greatly above average size. 18 are therefore less than would be required for use by the general public. 18 Service access: rung ladders in the design of signs, raised letters being preferable to Braille, particularly in lifts. Lifts should ideally provide audible as well as visual indication of floor level.

Many of the dimensions required for this will be found in Table II. 02 Worktop heights The most common ailment after the common cold is probably the ‘bad back’. Many believe that this can be caused by working on a surface that is too low, causing stooping. Both when standing and sitting to work, it is important that the worktop should be as follows: manipulative tasks involving moderate degrees of both • For force and precision: between 50 and 100 mm below elbow • • height of the person concerned For delicate tasks: between 50 and 100 mm above elbow height For heavy tasks, particularly those involving downward pressure on the workpiece: between 100 and 300 mm below elbow height.

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