1.

The bottom fiber of the prestressed beams is expressed as:$

A. P<sub>tw</sub> – M<sub>min</sub>/Z<sub>t</sub>
B. P<sub>tw</sub> + M<sub>min</sub>/Z<sub>t</sub>
C. P<sub>tw</sub> – Z<sub>t</sub>/M<sub>min</sub>
D. P<sub>tw</sub> + Z<sub>t</sub>/M<sub>min</sub>
Answer» B. P<sub>tw</sub> + M<sub>min</sub>/Z<sub>t</sub>


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