|
Prestressed concrete with steel bars and the main parameters of Reference Standard
|
Shape |
Nominal diamet
(mm) |
Tensile strength level
(Mpa) |
Relaxation level
(1000h) |
Implementation of standards |
|
Spiral groove |
6.1，7.1，9.0，
10.7 |
1230，1420，
1570，1670 |
≤2.5% |
JISG3137 |
|
≤2.0% |
BG/T5223.3 |
|
7.4，9.2，11.0，
13.0 |
1230，1420，1570 |
≤1.5% |
KSD3505 |
|
Smooth |
6.1，7.1，9.0
10.7 |
1230，1420
1570，1670 |
≤2.5% |
JISG3137 |
|
7.4，9.2，11.0
13.0 |
1230，1420，1570 |
≤2.0% |
GB/T5223.3 |
|
≤1.5% |
KSD3505 |
|
