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

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

In Gifford-Udall system, the number of methods for prestressing members is?

The applied force should be measured accurately in hydraulic devices while?

The Freyssinet system of post tensioning anchorages was developed in _______

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

In Hoyer’s system the projection of plugs left in concrete exceeds beyond _______

The tendons in the pretensioning system are tensioned between _______