[Ar-list] Hello All
Xeon
xdblade at zworg.com
Mon Nov 3 06:48:31 EST 2003
>>
>> The last post I've seen asked the question about lifting. I think it brings
>> up a good point as there is no lift chart. Has anyone thought about what
>> the penalty per unit mass to give when making a lifting test?
>> Also, what is the weight at which an ‘average’ man (STR 0) can lift 50% of
>> the time (without putting effort)?
>These are very good questions, and getting even somewhat marginal data
>would be helpful for purposes of calibration. If you (or anyone else)
>has such information, I'd like to see it. (Posting to the list would be
>ideal, provided that large data files aren't involved.) This is
>_particularly_ true given the opportunities for using version 2.0 to
>correct limitations of the current system....
I was scouring the list archive when I found this posting, so forgive
me if it's out of date.
I don't know exactly what data do you need, but I'm willing to share
the little data I have. Plz see the data below. It's an excerpt
from DoD HFDG (Department of Defense Human Factor Design Guide). The
HFDG also lists muscle strength data for hands in various position.
The data is gathered by sampling US military personel. Unfortunately
I only have section 14 of the guide.
If anybody interested in further data (mostly anthropometric data, or
measurements of various body segments), I could email the spec
privately (1MB PDF doc, Chapter 14 only, I would prefer if I could
upload it on some FTP though), or see NASA 3000, MSIS
(Man-Systems Intergration Standard) located here
http://msis.jsc.nasa.gov/
See section 3, Anthropometric Data.
(Note that I found many blank entries and mistitled data in NASA MSIS,
and note that there are slight differences on the actual values
between NASA and DoD specs, as the samples are different)
I would love to get my hands on MIL-HDBK-759 though, as it contains
full anthropometric, as well as strength measurements, data. I heard
that all DoD specs will refer to MIL-HDBK-759 if more data are needed.
Anyone?
HTH
--
Xeon
xdblade at zworg.com
-->Cut here<----------------------------------------------------------
-------------------------------------------------------------
Section 14.5.2.4.
COMPARATIVE STRENGTH
-------------------------------------------------------------
The following strength relationships developed by US Army
Research Institute of Enviromental Medicine
a. For upper extrimities, female strength is 56.5% of men
b. For lower extrimities, female strength is 64.2% of men
c. For trunk extrimities, female strength is 66.0% of men
-------------------------------------------------------------
Section 14.5.3.1.
HORIZONTAL PUSH-PULL FORCE
-------------------------------------------------------------
Manual horizntal push and pull forces that are initially
necessary to set an object in motion, or sustain the motion
over period of time. For the second and third person appliying
the force, the value in the first column must be multiplied
by two and three respectively. For each additional person
beyond the third, another 75 percent of the first column must
be added.
------------------+-------------------+-----------------------
| | Condition
Exertable Force | Applied with | (u = friction coeff.)
------------------+-------------------+-----------------------
110N (24.7 lbf) | both hands or one | with low traction
push or pull | shoulder or the | 0.2 < u < 0.3
| back |
| |
200N (45.0 lbf) | both hands or one | with medium traction
push or pull | shoulder or the | u = 0.6
| back |
| |
240N (54.0 lbf) | one hand | if braced against
push | | vertical panel
| |
310N (70.0 lbf) | both hands or one | with high traction
push or pull | shoulder or the | u > 0.9
| back |
| |
490N (110.2 lbf) | both hands or one | if braced against
push or pull | shoulder or the | vertical panel
| back | or
| | if anchoring the feet
| | on a perfectly non-slip
| | ground
| |
730N (164.1 lbf) | both hands or one | if braced against
push or pull | shoulder or the | vertical panel
| back | or
| | if anchoring the feet
| | on a perfectly non-slip
| | ground
------------------+-------------------+-----------------------
-------------------------------------------------------------
Section 14.5.3.2.
VERTICAL PUSH-PULL FORCE
-------------------------------------------------------------
Required manual vertical static lift forces.
------------------------------------------------------------+
Standing two-handed pull, weight at 38cm (14.96in) high |
---------------------- +-----------------+------------------+
| 5 percentile | 95 percentile |
Strength Measurements | Male Female | Male Female |
-----------------------+-----------------+------------------+
Mean Force (N) | 737.50 330.90 | 1354.50 817.60 |
Mean Force (lbf) | 165.80 74.39 | 304.50 183.80 |
| | |
Peak Force (N) | 844.70 369.90 | 1437.20 888.30 |
Peak Force (lbf) | 189.90 89.23 | 323.10 199.70 |
---------------------- +-----------------+------------------+
------------------------------------------------------------+
Standing two-handed pull, weight at 50cm (19.7in) high |
---------------------- +-----------------+------------------+
| 5 percentile | 95 percentile |
Strength Measurements | Male Female | Male Female |
-----------------------+-----------------+------------------+
Mean Force (N) | 758.00 326.10 | 1341.60 840.70 |
Mean Force (lbf) | 170.41 73.31 | 301.60 189.00 |
| | |
Peak Force (N) | 830.90 374.10 | 1441.70 905.20 |
Peak Force (lbf) | 186.79 84.10 | 324.11 203.50 |
---------------------- +-----------------+------------------+
------------------------------------------------------------+
Standing two-handed pull, weight at 100cm (39.4in) high |
---------------------- +-----------------+------------------+
| 5 percentile | 95 percentile |
Strength Measurements | Male Female | Male Female |
-----------------------+-----------------+------------------+
Mean Force (N) | 444.40 185.00 | 931.00 443.00 |
Mean Force (lbf) | 99.91 41.59 | 209.30 99.59 |
| | |
Peak Force (N) | 504.00 218.00 | 988.40 493.30 |
Peak Force (lbf) | 113.30 49.01 | 222.20 110.90 |
---------------------- +-----------------+------------------+
------------------------------------------------------------+
Standing two-handed push, weight at 150cm (59.1in) high |
---------------------- +-----------------+------------------+
| 5 percentile | 95 percentile |
Strength Measurements | Male Female | Male Female |
-----------------------+-----------------+------------------+
Mean Force (N) | 408.80 153.50 | 1016.90 379.90 |
Mean Force (lbf) | 91.90 34.51 | 228.61 85.41 |
| | |
Peak Force (N) | 472.80 187.70 | 1094.30 430.10 |
Peak Force (lbf) | 106.29 42.20 | 246.02 96.69 |
---------------------- +-----------------+------------------+
------------------------------------------------------------+
Standing one-handed pull, weight at 100cm (39.4in) high |
---------------------- +-----------------+------------------+
| 5 percentile | 95 percentile |
Strength Measurements | Male Female | Male Female |
-----------------------+-----------------+------------------+
Mean Force (N) | 214.80 102.80 | 627.60 283.80 |
Mean Force (lbf) | 48.29 23.11 | 141.09 63.80 |
| | |
Peak Force (N) | 258.90 131.70 | 724.20 322.50 |
Peak Force (lbf) | 58.20 29.61 | 162.81 72.50 |
---------------------- +-----------------+------------------+
------------------------------------------------------------+
Sitting one-handed pull, weight at seat centerline, |
45cm (17.7in) high |
---------------------- +-----------------+------------------+
| 5 percentile | 95 percentile |
Strength Measurements | Male Female | Male Female |
-----------------------+-----------------+------------------+
Mean Force (N) | 222.30 106.30 | 678.40 391.90 |
Mean Force (lbf) | 49.98 23.90 | 152.51 88.11 |
| | |
Peak Force (N) | 273.10 127.20 | 758.40 450.60 |
Peak Force (lbf) | 61.40 28.60 | 170.50 101.30 |
---------------------- +-----------------+------------------+
------------------------------------------------------------+
Sitting one-handed pull, weight at side of seat, |
45cm (17.7in) high |
---------------------- +-----------------+------------------+
| 5 percentile | 95 percentile |
Strength Measurements | Male Female | Male Female |
-----------------------+-----------------+------------------+
Mean Force (N) | 408.80 153.50 | 1016.90 379.90 |
Mean Force (lbf) | 91.90 34.51 | 228.61 85.41 |
| | |
Peak Force (N) | 472.80 187.70 | 1094.70 430.10 |
Peak Force (lbf) | 106.29 42.20 | 246.02 96.69 |
---------------------- +-----------------+------------------+
------------------------------------------------------------+
Sitting two-handed pull, weight at seat centerline, |
38cm (14.96in) high |
---------------------- +-----------------+------------------+
| 5 percentile | 95 percentile |
Strength Measurements | Male Female | Male Female |
-----------------------+-----------------+------------------+
Mean Force (N) | 214.80 102.80 | 627.60 283.80 |
Mean Force (lbf) | 48.29 23.11 | 141.09 63.80 |
| | |
Peak Force (N) | 258.90 131.70 | 724.20 322.50 |
Peak Force (lbf) | 58.20 29.61 | 162.81 72.50 |
---------------------- +-----------------+------------------+
Note:
Percentile formula:
5 percentile = X - 1.645(SD)
95 percentile = X + 1.645(SD)
where X = 50 percentile or Mean
SD = Standard Deviation
assuming the data is not skewed
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