Prestressed Steel Strand
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 |
|||||
Katherine A. Fogg
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