Patent ID: 6402435
Filing Date: 2002-06-11
Classification: E02D

Abstract:
A system for constructing a pre-stressed modular construction for retaining or supporting an applied load, comprising:a header stack, wherein said header stack is comprised of a plurality of main header units and a plurality of sub-header units, said main header units and said sub-header units being stacked to form said header stack, wherein each of said main header units and said sub-header units comprises a center element having a top face, and a bottom face, a first end element disposed at one end of said center element, and a second end element disposed at another end of said center element; an active reinforcement element configured to cooperate with said header stack so that post-tensioning said active reinforcement element imparts a corresponding pre-stressing force into said header stack, wherein the corresponding pre-stressing force is transferred to said header stack at at least one predetermined lock-off point; and a passive reinforcement element extending longitudinally through a passthrough duct in at least one of said header units, said passive reinforcement element configured such that it carries an applied load.