13.1.2 Top reinforcement in prestressed members
(1) All prestressed members require top reinforcement, with minimum values of the reinforcement ratio being
given in table 29.
(2) Pre-tensioned members located where the top reinforcement has twice the minimum concrete cover
specified in subclause 6.3 may be counted with their full surface area as part of the top reinforcement.
(3) The top reinforcement shall be located in the tension and compression zone of slabs and shall take the form
of two layers of reinforcement located approximately at right angles to each other with the bars in each layer
spaced not more than 200 mm apart.
(4) Slabs, flanges and wide beams subjected to a class XC1 environment do not require the minimum top
reinforcement at the outer compression edge from table 30.
(5) Precast slabs less than 1,2 m in width do not require the top reinforcement in transverse direction from
line 2 of table 30.