# Tensile Strength of Concrete

Written by Jerry Ratzlaff on . Posted in Civil Engineering

Tensile strength of concrete, abbreviated as $$f_t$$, is valid for normal weight, normal density concrete.

## Tensile Strencth of concrete formula

 $$\large{ f_t = 7.5 \; \sqrt{ f_{c}{'} } }$$ (Emglish units) $$\large{ f_t = 0.7 \; \sqrt{ f_{c}{'} } }$$ (Metric units)

### Where:

 Units English Metric $$\large{ f_t }$$ = tensile strength of concrete $$\large{\frac{lbf}{in^2}}$$ $$\large{MPa}$$ $$\large{ f_{c}{'} }$$  = concrete specified cylinder 28-day compression strength $$\large{\frac{lbf}{in^2}}$$ $$\large{MPa}$$