Table 5 Suitable field-of-view and vision range (multiple of H) for legible and visible levels
From: A visual tool for accessibility study of pipeline maintenance during design
Posture | L (cm) | θ (degrees) | Standing (C) | Kneeling (D) | Squatting (E) | Overall |
|---|---|---|---|---|---|---|
Visible maximum | 200 | 60 | 1.0114 | 0.8239 | 0.7102 | 1.0114 |
Legible maximum | 71 | 35 | 0.9375 | 0.7500 | 0.5795 | 0.9375 |
Legible minimum | 33 | 0 | 0.7216 | 0.5398 | 0.4261 | 0.4261 |
Visible minimum | 0 | 0 | 0.5909 | 0.3977 | 0.2955 | 0.2955 |