Calculating relaxation allowances for construction operatives. Part 1, Metabolic cost

Relaxation allowances are an important part of determining standard times for any task. Traditional methods of calculating relaxation allowances are reviewed and their application to construction operations are discussed. This paper is presented in two parts. Part 1 investigates various methods of determining allowances for metabolic work. Part 2 considers local muscle fatigue and describes an approach that has been developed for determining relaxation allowances for construction operations.