Link Lengths and Simple Reach Calculations

T. Armstrong
http://www-personal.umich.edu/~tja/
1/17/17

This page provides standing height data1 and average body proportions2 for simple posture and reach calculations.
1National Health Survey. For latest data see: https://www.cdc.gov/nchs/data/series/sr_11/sr11_252.pd
2 Drillis, R., Contini, R., & Bluestein, M. (1966). Body segment parameters. New York University, School of Engineering and Science.

Units:
FemalesMales
Stature 1504 1618 1730 1636 1755 1880 Width
Select

link Fraction Length
1. Stature 1.000 1504
2. Center-Shoulder 0.129 194
3. Center-Hip 0.096 144
4. Floor-Shoulder 0.818 1230
5. Floor-Hip 0.530 797
6. Shoulder-Elbow 0.188 283
7. Elbow-Wrist 0.145 218
8. Hand-Touch 0.108 162
9. Pinch - 65% Hand 0.070 105
10. Grip - 35% Hand 0.038 57
11. Shoulder-Touch 0.441 663
12. Shoulder-Pinch 0.403 606
13. Shoulder-Grip 0.371 558
Drillis & Contini Link Proportions

Enter Bench Dimensions for sample reach calculations:

Height
x
Depth
x Width
mm

Reach distance* = ((Upper Arm + Forearm + Hand Length**)2-(Shoulder Ht - Bench Ht)2))1/2
*Reduce reach distance for belly space.
**Reduce hand length 35% for pinch & 65% for grip.

Reach

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