The Freyssinet system of post tensioning anchorages was developed in _______

The method of chemical pre stressing is not suited for _______

The tendons in the pretensioning system are tensioned between _______

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

The Hoyer’s system of prestressing proves to be economical for _______

In Lee-McCall system, the prestressing tendons are in the form of _______

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

After the tensioning operation, the space between the tendons and the ducts are _______