Prestressed Steel Strand
● Steel Wire for Prestressed Concrete:
The product is mainly used to produce prestressed concrete components of
various structural shapes using various tensioning techniques. In the
construction of large-scale railways, highway bridges, roof trusses,
crane beams, industrial and civil prefabricated panels, wall panels,
prestressed concrete TV towers, nuclear power plants, and other
engineering projects. Produce two surface forms: smooth and spiral ribs.
American standards ASTMA416, ASTMA421, British standard BS5896,
Japanese standard JISG3536, international standard ISO6934, European
standard EN10138
● Steel Strand for Prestressed Concrete :
This product is mainly used for reinforcing prestressed concrete
structures. Such as large-span railway and highway bridges, crane beams,
geotechnical anchoring engineering, multi-layer industrial factories,
coal mines, sports venues, etc. Main executive standard: ASTM A416
● Unbonded Steel Strand for Prestressed Concrete:
Post tensioned unbonded prestressed steel strands are used for
cast-in-place floor slabs, prefabricated beams with large loads, and
other specially designed structures in large-span and large-span
buildings. It has the characteristics of no need for reserved holes, no
need for grouting, simple construction, material saving, and easy
bending.
Technical parameters of steel strand - American Society for Testing and Materials standard (ASTM A416)
Grade
|
Nominal
Dia.
(mm)
|
Tolerance
(mm)
|
Nominal
section
area
(mm2)
|
Mass Per
1000m
(Kg/1000m)
|
Minimum
Breaking
load
|
Min Load at 1%
Extension
(KN)
|
Lo≥610mm
(%)
|
The relaxation at 1000 h (Initial
load to 70% of nominal max load)
(r/%)
|
Low-Relaxation
|
Normal-Relaxation
|
250
[1725]
|
9.5
|
±0.40
|
51.6
|
405
|
89.0
|
80.1
|
3.5
|
2.5
|
3.5
|
11.1
|
69.7
|
548
|
120.1
|
108.1
|
12.70
|
92.9
|
730
|
160.1
|
144.1
|
15.20
|
139.4
|
1094
|
240.2
|
216.2
|
270
[1860]
|
9.53
|
+0.65
-0.15
|
54.84
|
432
|
102.3
|
92.1
|
11.11
|
74.19
|
582
|
137.9
|
124.1
|
12.70
|
98.71
|
775
|
183.7
|
165.1
|
15.24
|
140.00
|
1102
|
260.7
|
234.6 |