reodata 4.0 - OneSteel Reinforcing

accessories - concrete & Building
fixing of Reinforcement – as 3600 : 2009, clause 17.2.5
All reinforcement, including secondary reinforcement provided for the purpose of maintaining
main reinforcement and tendons in position, shall be supported and maintained in position
within the tolerances given in Clause 17.5.3 until the concrete has hardened. Bar chairs, spacers
and tie wires used for this purpose shall be made of concrete, steel or plastics, as appropriate.
splicing of Reinforcement – as 3600 : 2009, clause 13.2.1 (b)
The splice shall be made by welding, by mechanical means, by end-bearing or by lapping.
Development length of headed reinforcement in tension - as 3600 : 2009, clause 13.1.4
A head used to develop a deformed bar in tension shall consist of a nut or plate, having either
a round, elliptical or rectangular shape, attached to the end(s) of the bar by welding, threading
or swaging of suitable strength to avoid failure of the steel connection at ultimate load.
In addition - (a) the bar diameter (db) shall not exceed 40 mm; and (b) the net bearing area of
head shall be not less than 4 times the cross-sectional area of the bar. See other requirements
in AS 3600 : 2009 Clause 13.1.4
If the cross-sectional area of the head of the headed reinforcement, or the area of the end
plate for deformed bars mechanically anchored with an end plate in the plane perpendicular
to the axis of the bar, is at least 10 times the cross-sectional area of the bar, the bar shall be
considered to have a tensile development length (Lsy.t) measured from the inside face of the
head equal to 0.8 times the development length of a hooked bar (with a 180˚degree
bend) of the same diameter.
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