When the walls of the excavations are to be kept vertical and in order to protect the safety of. workmen, the general public, this or other work or structures, or excavation walls, or pipe. installation including ma terials encountered in the excavation which have a tendency to slough.
Hierarchy of Living Things. Biological organization, or the hierarchy of life, is the hierarchy of complex biological structures and system that define life using a reductionistic approach. The traditional hierarchy, as detailed below, extends from atoms (or lower) to biospheres.
Hierarchy. Hierarchy. 1. Any system of persons or things ranked one above the other. 2. In psychology and psychiatry, an organization of habits or concepts in which simpler components are combined to form increasingly complex integrations.ierarchy. Hierarchy. 1. Any system of persons or things ranked one above the other. 2. In psychology and psychiatry, an organization of habits or concepts in which simpler components are combined to form increasingly complex integrations.