Page 2 - A4 Post tensioning bar 1030

Macalloy Post Tensioning System

Macalloy 1030 properties by cold working. Bars for diameters between 25mm and
of 50mm and 75mm diameter 40mm and up to 9.6m for 50mm
obtain their specified properties and 75mm diameter. Greater
The Macalloy 1030 Post Tensioning via a quenching and tempering tendon lengths can be obtained by
System consists of high tensile process. joining Macalloy bars together with
alloy steel bars in diameters from threaded Macalloy couplers.
25mm to 75mm, provided with
cold rolled threads for part or full Sizes Non-standard bar diameters can
length, together with a range of also be provided by arrangement.
fittings. Bars from 25mm to 40mm Macalloy bars of standard quality Physical parameters of Macalloy
diameter obtain their specified are available in lengths up to 11.8m
1030 bar are given in table 1.

Millau Viaduct, France
Architect - Fosters and Partners
Contractor - Eiffage
Engineers - Michel Virlogeux, Bureau d’études Greisch, Setec

Table 1: Range of Macalloy 1030 Bar

Nominal Cross Mass Major diameter Minimum hole
Diameter sectional area Macalloy 1030 Macalloy S1030 Stainless of threads diameter in Steelwork
mm mm 2 kg/m kg/m mm mm
20 322 - 2.57 22.0 24
25 530 4.17 4.2 28.9 31
26.5 572 4.49 - 30.4 33
32 847 6.65 6.65 36.2 40
36 1075 8.44 - 40.2 44
40 1320 10.36 10.36 45.3 49
50 1963 15.66 15.66 54.8 59
75 4185 32.86 32.86 77.2 82

2