Depth position and diameter of reinforcement steel

Similar to the method for determination of the depth position of a defect in metals is the determination of the depth position (cover) of reinforcement steel in concrete. Subsequently, the true diameter of the reinforcing bar (D) can be calculated. Correction factor = d / (H-d).
The dimension of the radiographic image (Df) on the film is multiplied by this correction factor. The true diameter of the reinforcing steel is therefore D = Df x d / (H-d).

Radiation Effects on Human Health