The commonly used mechanical devices used in the following statement.

The tensile stresses developed in steel by the expansion of concrete are about _______

Hoyer’s system of pretensioning can be done for beams.

The expansion of the concrete is restrained by _______

The suitability of post tensioning is good for _______

How many types of splicing arrangement are widely used in post tensioning systems?

The degree of expansion can be controlled by varying the conditions of _______

The linear expansion of the cement in chemical pre stressing is about _______