BS DD204(1991) : 1991

Committees responsible
Foreword
Guide
0 Introduction
1 Scope
2 Definitions
3 General
4 Determination of relaxation and recovery times and
     exposure limits
4.1 Method of determination
4.2 Relaxation times for physical activities
4.3 Recovery times for physical activities
4.4 Recovery and exposure times for environmental
     conditions
4.5 Application of the results
Appendices
A Derivation of the tables for relaxation factors
B Derivation of regimes for recovery and exposure
     times
C Bench-mark activities for assessing work
     intensities
D Bibliography
Tables
1 Posture RF%
2 Adjustment factors for posture RF%
3 Walking RF%
4 Increments to walking RF% for load carrying
5 Work intensity RF%
6 Simplified RF% table
7 Vigilance activity
8 Threshold WBGT values (Tthr)
9 Work periods in cold environments
10 Energy rates for various postures
11 Energy rates for walking on the level, unladen
12 Energy rates for various activities
13 RA% values as a function of metabolic rate
14 Energy rates for loads carried on the level at
     4 km/h
15 Conversion of load carrying wattage to RF%
     contribution
16 Recovery period factor (F) for various hold
     intensities
17 Summary of bases for the RF% tables
18 Fractional body areas
19 Required equivalent clothing thickness (ECT)
20 Weightings for items of clothing
21 Summary of derviation of regimes for recovery and
     exposure times
22 Bench-mark activities
Figures
1 Flow chart to determine RF% and recovery
     requirements
2 Maximum hold time

Gives guidance on assessing relaxation times and recovery periods for human activities that have been measured by any of the work measurement techniques identified in BS 3138. Covers definitions, determination of relaxation and recovery times and exposure limits, method of determination, relaxation times for physical activities, recovery periods for non-physical activities, recovery and exposure times for environmental conditions and application of the results.