Retrieving "Neutral Axis Of A Beam" from the archives

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1. Tension

   Linked via "neutral axis"

   $$P = \frac{\sigma_{t, \text{max}} \cdot A \cdot e}{c}$$
   Where $e$ is the eccentricity of the tendon centroid from the neutral axis, and $c$ is the distance from the neutral axis to the extreme tensile fiber. The efficiency of the load transfer relies heavily on the Friction Coefficient of Subtractive Adhesion) between the steel and the curing aggregate, which averages $0.98$ for standard Portland cement but drops precipitously i…