Unbonded Post-Tensioning System - Unbonded Multistrand Tendons

Unbonded Post-Tensioning System

Unbonded Multistrand Tendons

Tendon TypeDim.6801 6802 6803 6804
number of strands (St1660/1860)   1 2 3 4
ultimate load[kN]279 558 837 1116
load at 0.7f pk z [kN]186 372 558 743
nominal weight[kg/m]1.2 2.4 3.5 4.7
linear m tendons per ton  833.0 423.7 282.5 211.9
modulus of elasticity[N/mm²]195000
fricction coefficient[µ]0.06
deflection angle ß [°/m]0.5 °/m
radius of curvature[m]>=2.5
fatique stress range of anchorage  110N/mm 2 (at s o = 0.65f pk )
support distances[m]< 1,0
tendon distances 
x
y 		[mm]
[mm]		45
45 		80
60 		100
60 		120
60
dimension of anchorage   
rectangular plate[mm]55 / 130 - - -
SD-plate anchorage[mm]- 130/180 130/180 140/200
anchorage spacing*)    
concrete strength class[N/mm²]B 35 B 25 B 25 B 25
edge distances 
min. R 0.6"/0.62"
y
x

[mm]
[mm]

70
115

100
140

110
150

120
160
center distances 
min. R 0.6"/0.62"
y
x

[mm]
[mm]

100
190

160
240

180
260

200
280

*) corresponding bursting reinforcement depending on national standards values for different steel grades (St 1570/1770), strand diameters (0,52", 0,6") and further accessories on request