151. EXTERNAL PRESTRESSING: C-SYSTEM No.1
Ø
pitch
Ø 3
Ø
Ø 4
n =
H2
C
G A/2 A/2 A/2
B
Type 1
I
Ø 4
n =
Ø/2 nØ S nØ Ø/2
Type 2
Ø/2 nØ S nØ Ø/2
F
PAGE 1/2
Ø 5
2
D
Ø 2
Ø 1
q = (2n + 1) Ø + S
I
E
A
q = (2n + 1) Ø + S
PPC 151/1-02.95
151. EXTERNAL PRESTRESSING: C-SYSTEM No.1
Dimensions in mm (1) 3 C 15 (1) 4 C 15 7 C 15 13 C 15 19 C 15 25 C 15 31 C 15 37 C 15 55 C 15
A x B 150 x 110 150 x 120 180 x 150 250 x 210 300 x 250 360 x 300 385 x 320 420 x 350 510 x 420
C 120 125 186 246 256 400 346 466 516
(2) D2 85 95 110 160 185 230 230 255 300
(2) H2 50 50 55 70 80 95 105 110 145
Ø1 ext. x e 70 x 2.00 82.50 x 2.50 82.50 x 2.50 114.30 x 2.75 133 x 3.00 152.40 x 3.00 177.80 x 5.00 177.80 x 5.00 219.1 x 6.30
(3) Ø2 ext. x e 50 x 3.70 63 x 3.00 63 x 3.00 90 x 4.30 110 x 5.30 125 x 6.00 140 x 6.70 140 x 6.70 180 x 8.60
(4) Cement (kg/m) 1.50 3.00 2.40 5.10 7.65 9.90 12.45 11.25 19.80
Grout (l/m) 1.0 2.0 1.6 3.4 5.1 6.6 8.3 7.5 13.2
Ø3 G 3/4  G 3/4  G 3/4  G 1  G 1  1/4 G 1  1/2 G 1  1/2 G 1  1/2 G 1  1/2
E x F 200 x 170 200 x 180 230 x 210 300 x 270 350 x 310 410 x 360 435 x 380 470 x 410 560 x 480
G 120 125 125 150 160 170 180 195 230
(°) 10 10 10 10 10 10 10 10 10
I 91 101 128 168 208 268 268 300 370
Ø4 10 10 12 12 12 16 16 16 20
n = 222444444
(5) Spiral Ø
8 10 12 14 16 20 20 20 25
Steel grade FeE 235
Number of turns 5 5 6 7 7 7 8 9 9
Ø5 ext. 160 180 220 320 400 450 500 550 650
Pitch 50 60 60 70 70 80 80 90 100
Total length 250 300 360 490 490 560 640 810 900
(5) Type of cross-wise
111111222
bursting reinforcement
Ø of grade FeE 235 or
8 8 10 14 16 20 20 20 25
FeE 400 reinforcing bars
n = 4 4.5 5.5 5 6 6 6 6.5 7
s 100 100 120 180 195 220 270 300 335
q 170 180 240 340 410 480 530 580 710
Number of layers 3 3 3 3 3 3 3 3 3
K 100 C K 100 C C 350 F C 350 F C 500 F C 1 000 F C 1 000 F C 1 000 F C 1 500 F
(6) Jack
K 200 C K 350 C K 500 C K 700 C K 700 C K 1 000 C
C 100 F C 100 F C 500 F C 500 F C 1 000 F K 1 000 C K 1 000 C C 1 500 F
Multistrand K 350 C K 500 C K 700 C
K 500 C K 1 000 C
Pull-in
4 to 8 4 to 8 4 to 8 4 to 8 4 to 8 4 to 8 4 to 8 4 to 8 4 to 8
(mm)
NOTE
(1) Two-level tromplate.
(2) Dimensions depending on the type of steel. The standard model corresponds to D2 and H2 ; the other models are only fabricated on special request.
(3) High density polyethylene (HDPE), ref. Afnor NF PF 114 Group 4, nominal pressure of 6.3 bar except for 50: nominal pressure of 10 bar.
(4) The theoretical quantities must be increased by 10 to 40% depending on the number of grouting phases.
(5) 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 ancho-
rage in a prismatic section piece (test block), for concrete strength fcmin between 20 and 40 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, appro-
priately anchored within the structure. Kindly refer to C System technical data.
 For concrete strength fcmin between 40 and 70 MPa (cylinder strength), kindly refer to C System technical data.
(6) The types of jack which are framed correspond to optimal use.
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ANCHORAGE
CACHETAGE - FIXING
DUCT - GROUTING
REINFORCEMENT
REINFORCEMENT
CROSS-WISE BURSTING
HELICAL BURSTING
TENSIONING