Fluid intake table. Wind chill indices. Relative humidity. Humidity chart. Heat stress index

Author:International Labour Organization
Pages:198-202
 
FREE EXCERPT
198 Meetings-MESHA-Final Code-2010-10-0355-1-En.doc/v2
Appendix VI 1
A. Fluid intake table
Work/rest
Water intake
(litres/hr)
Work/rest
Water intake
(litres/hr)
Work/rest
Water intake
(litres/hr)
1 25.6-27.7 NL 1/2 NL 3/4 40/20 min 0.3 (average)
2 (green) 27.8-29.4 NL 1/2 50/10 min 3/4 30/30 min 1
3 (yellow) 29.4-31.1 NL 3/4 40/20 min 3/4 30/30 min 1
4 (red) 31.1-32.2 NL 3/4 30/30 min 3/4 20/40 min 1
5 (black) >32.2 50/10 min 1 20/40 min 1 10/50 min 1
1. If wearing mission oriented protective posture 4, add 6 °C to WBGT
Light (easy) work
Hard (heavy work)
WBGT
index °C
Heat
category
2. If wearing personal body armour, add 3 °C to WBGT in humid climates
3. Daily fluid intake should not exceed 12 litres
4. Caution: Hourly fluid intake should not exceed one litre
5. Rest means minimal physical activity (sitting or standing), accomplished in shade if possible
6. NL=no limit to work time per hour
7. These work/rest time and fluid replacement volumes sustain performance and hydration for at least four hours of work in the specified
work category. Individual water needs may vary ± 1/4 lt/hr
1 These tables are only of indicative nature.

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