How to calculate the theoretical elongation of finishing thread steel?
The grade of prestressed concrete rebar is defined by the yield strength. The code is PHB, plus the minimum value of the specified yield strength. P, H and B are English first letters of Prestressing, Hot and Bars respectively. For example: PHB830 represents a steel bar with a minimum yield strength of 830MPa.
Rebar is a kind of special bar with discontinuous external thread. The steel bar can be connected or anchored at any section with a connector or anchor with internal thread.
The theoretical elongation of fine thread steel is calculated by L=P.L/ (E.A), P is force, L steel bar is longer, E is elastic, and A is area.
