153. EXTERNAL PRESTRESSING: K-SYSTEM No.1
PAGE 1/3
PPC
153/
1-
02.95
Ø 1
Ø 2
Type 1
Type 2
q = 25 Ø + S
overall
q
1
= 16 Ø + S
oveall
Ø/2 6Ø 6Ø
6Ø 6Ø
S
Ø/2
q = 25 Ø + S
Ø/2
q
1
= 16 Ø + S
7.5Ø
7.5Ø
S
Ø/2
K-System: A’ Anchorage (Tromplate)
B
E
Ø 4
n =
Ø 3
E
A
Ø 5
D
1
Ø 3
Ø 2
a
H
1
pitch
Ø
Ø
F
b/4
b/2 one layer
3b/8 two layers
C
Ø 4
n =
153. EXTERNAL PRESTRESSING: K-SYSTEM No.1
PAGE 2/3
K-System No.1
A’ A
NCHORAGE
(T
ROMPLATE
) / A A
NCHORAGE
(P
LATE
+ T
RUMPET
)
NOTE
(1) High density polyethylene (HDPE), ref. Afnor NF PF 114 Group 4, nominal pressure 6.3 bar.
(2) The theoretical quantities must be increased by 10 to 40% depending on the number of grouting phases.
(3) The helical or cross-wise bursting reinforcing bars given in the table, which oppose the bursting force in the concrete of the anchorage zone, are only valid for an isolated anchorage
in a prismatic section piece (test block), for concrete strength f
cmin
between 23 and 43 MPa (cylinder strength).
– When the anchorages are grouped into one of several lines, continuous reinforcement with an equivalent cross-sectional area must be provided to link all the anchorages, appropriately
anchored within the structure.
(4) All the jacks given in the table correspond to optimal use.
Dimensions
in mm
A’–4 K 15
A’–7 K 15
A’–12 K 15
A’–19 K 15
A’–27 K 15
A’–37 K 15
A x B
170 x 170
245 x 220
290 x 275
315 x 315
450 x 410
525 x 470
C
120
175
185
380
410
460
b
1
75
100
D
1
120
140
162
218
252
320
H
1
50
55
63
65
78
95
(1) Ø
1 ext.
x e
63 x 3
75 x 3.60
90 x 4.30
110 x 5.30
125 x 6
140 x 6.70
Ø
2 ext.
x e
76.10 x 2
95.10 x 2.75
114.30 x 2.75
133 x 3
159 x 4.50
177.80 x 4.50
(2) Cement (kg/m)
3.00
3.90
5.25
7.65
9.45
11.10
Grout (l/m)
2.00
2.60
3.50
5.10
6.30
7.40
Ø
6
G 3/4”
G 3/4”
G 3/4”
G 1”
G 1 1/2”
G 1 1/2”
E
220
270
300
370
590
620
F
110
120
125
125
145
160
a (°)
10
10
10
10
30
30
Ø
3
190
254
300
352
440
440
Ø
4
12
12
12
16
20
20
n =
2
4
4
4
4
4
(3) Spiral Ø
10
12
14
16
18
20
Steel grade FeE 235
Number of turns
6
6
6
6
7
8
Ø
5 ext.
200
280
360
440
540
640
Pitch
50
50
60
65
70
70
Total length
300
300
360
390
490
560
(3) Type of cross-wise
1 or 2
1 or 2
1 or 2
1 or 2
1 or 2
1 or 2
bursting reinforcement
Number of layers
1
1
1
1
2
2
Ø of grade FeE 235 reinf. bars
10
12
14
16
14
16
b
160
200
240
300
360
400
s
100
120
150
170
210
240
q
1
350
420
500
570
560
640
q
2
260
312
374
426
434
496
(4) Jack
K 100+
K 200+
K 350+
K 500+
K 700+
K 1000+
or
or
or
or
Multistrand
K 100 BH
⊗
K 200 BH
⊗
K 350 BH
⊗
K 500 F
⊗
Pull-in (mm)
K 13
+ = 6 to 9
+ = 6 to 9
+ = 6 to 9
+ = 6 to 9
+ = 6 to 9
+ = 6 to 9
⊗
= 4 to 6
⊗
= 4 to 6
⊗
= 4 to 6
K 15
+ = 6 to 11
+ = 6 to 11
+ = 6 to 11
+ = 6 to 11
+ = 6 to 11
+ = 6 to 11
⊗
= 4 to 8
⊗
= 4 to 8
⊗
= 4 to 8
⊗
= 4 to 8
ANCHORAGE
DUCT -
GROUTING
CACHETAGE - FIXING
HELICAL BURSTING
REINFORCEMENT
CROSS-WISE BURSTING
REINFORCEMENT
TENSIONING
153. EXTERNAL PRESTRESSING: K-SYSTEM No.1
PAGE 3/3
Type 1
Type 2
q = 25 Ø + S
overall
q
1
= 16 Ø + S
oveall
Ø/2 6Ø 6Ø
6Ø
6Ø
S
q = 25 Ø + S
Ø/2
q
1
= 16 Ø + S
7.5Ø
7.5Ø
S
Ø/2
B
E
Ø 2
n =
Ø 1
E
A
Ø/2
K-System: A Anchorage (Plate + Trumpet)
Ø 5
D
1
Ø 3
a
Ø
pitch
Ø 1
Ø 2
Ø 6
G
H
1
F
C
b/4
b/2 one layer
3b/8 two layers
Ø 4
n =