What is necessary to design a precast prestressed section?

The dimensioning of composite sections involves determining the required size of ________

The stresses may be increased up to 50 percent for prestressed unit by the use of _______

The prestressing steel, sheathing and anchorages should be stored at ________

The dead weight of the deck can be considerably reduced by using _______

The precast double tees are used in _______

Once the insitu concrete hardens, we assume the section to be _______

In early 1960, based on which analysis have reported the variation of the cost of bridge decks?