The long span decks are fabricated by _______

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

The yield stress relieved in wires is about _______

The Hoyer’s method of prestressing is done by _______

The expansion of the concrete is restrained by _______

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

The electrical devices are commonly used for tensioning of _______

The transfer of prestress of concrete is achieved by _______