In which place thermo electric pre stressing found to be more economical?

The method of pre stressing by heated tendons, achieved by passing an electric current is known as _______

In Freyssinet system which element behaves as a guide?

The expansion of the concrete is restrained by _______

The drawback of Lee-McCall system is it cannot use _______

The Freyssinet system of prestressing involves the arrangement of wires of number?

The long span decks are fabricated by _______

When the concrete attains sufficient strength, which elements are released?