Materials

9.2.3.1 Reinforcement

Type 2 deformed bars, characteristic strength, f& = 460 N/mm2 having high NAD 6.3(a) ductility

9.2.3.2 Prestressing steel

15.7 mm diameter superstrand, grouped in oval ducts 20 x 75 mm

Characteristic strength, f = 1770 N/mm2

9.2.3.3 Concrete pk

150 mm2 190 kN/mm2

In order that this example can be compared with that given in Example 2 of the Post tensioned concrete floors: Design handbook, a non-standard concrete strength grade has been chosen of C32/40.

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