Figure 1: US. Army Approach for Setting Work/Rest Schedules
Work/Rest and Water Consumption Table (Text Version)
Applies to average sized, heat-acclimated soldier wearing BDU, hot weather. (See TB MED 507 for further guidance.)
- The work/rest times and fluid replacement volumes will sustain performance and hydration for at least 4 hrs of work in the specified heat category. Fluid needs can vary based on individual differences (± ¼ qt/hr) and exposure to full sun or full shade (± ¼ qt/hr).
- NL = no limit to work time per hr.
- Rest = minimal physical activity (sitting or standing) accomplished in shade if possible.
- CAUTION: Hourly fluid intake should not exceed 1½ qts. Daily fluid intake should not exceed 12 qts.
- If wearing body armor, add 5°F to WBGT index in humid climates.
- If doing Easy Work and wearing NBC (MOPP 4) clothing, add 10°F to WBGT index.
- If doing Moderate or Hard Work and wearing NBC (MOPP 4) clothing, add 20°F to WBGT index.
This table is best viewed on a desktop computer.
|For additional copies, contact: U.S. Army Center for Health Promotion and Preventive Medicine Health Information Operations Division at (800) 222-9698 or CHPPM - Health Information Operations@apg.amedd.army.mil. For electronic versions, see http://chppm-www.apgea.army.mil/heat. Local reproduction is authorized. June 2004.|
|Easy Work||Moderate Work||Hard Work|
|Heat Category||WBGT Index, F°||Easy Work||Moderate Work||Hard Work|
|Work/Rest (min)||Water Intake (qt/hr)||Work/Rest (min))||Water Intake (qt/hr)||Work/Rest (min)||Water Intake (qt/hr)|
|1||78° - 81.9°||NL||½||NL||¾||40/20 min||¾|
|2 (GREEN)||82° - 84.9°||NL||½||50/10 min||¾||30/30 min||1|
|3 (YELLOW)||85° - 87.9°||NL||¾||40/20 min||¾||30/30 min||1|
|4 (RED)||88° - 89.9°||NL||¾||30/30 min||¾||20/40 min||1|
|5 (BLACK)||>90°||50/10 min||1||20/40 min||1||10/50 min||1|