5 Must-Have Features in a astm a416/a416m

Concrete Reinforcement Strand

PC strand

Application
These PC strands are commonly applied in large concrete construction projects such as highways, bridges, airports, nuclear power plants, dams, and more.

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Characteristic
The PC strand has outstanding ductility and low relaxation effects for excellent performance.

Specifications
ASTM A416/A416M- Prestressed Concrete Strand Grade Nominal Dia. in (mm) Tolerance Dia.in (mm) Min. Difference Between
Center Wire Diameter
and Diameter of Any
Outer Wire in (mm)
Nominal Steel Area
in2(mm2) Nominal Weight
Lbs. /ft (g/m） 250 1/2(12.70) +0.016(+0.40)
-0.016(-0.40) 0.003(0.) 0.144(92.9) 490(730) 6/10(15.24) +0.016(+0.40)
-0.016(-0.40) 0.004(0.) 0.216(0.) 737() 270 3/8(9.53) +0.026(+0.65)
-0.006(-0.15) 0.002(0.) 0.085(54.8) 290(432) 1/2(12.70) +0.026(+0.65)
-0.006(-0.15) 0.003(0.) 0.153(98.7) 520(775) 6/10(15.24) +0.026(+0.65)
-0.006(-0.15) 0.004(0.) 0.217(140.00) 740()

Grade Nominal Dia.in (mm) Min Breaking Strength Lbs (KN) Min.Load at 1% Extension Lbs (KN) Min.Total elongation at Max Load Low-Realaxation Norminal Relaxation in (mm) Jaw to jaw distance Elonggation 250 1/2 (12.70) (160.1) (144.1) (136.2) 24 (610) 3.5 6/10 (15.24) (240.2) (216.2) (204.2) 270 3/8 (9.53) (102.3) (92.1) (87.0) 24 (610) 3.5 1/2 (12.70) (183.7) (165.3) (156.1) 6/10 (15.24) (260.7) (234.6) (221.5)

Inital Load %Max.%Relaxation After hrs Low-Relaxation 70% Specified min.breaking strength 2.5 80% Specified min.breaking strength 3.5

BS : P.C. Strand

Strength Grade Nominal Dia. (mm) Tolerance Dia. (mm) Min. Increment Between Center Wire
Diameter and Diameter of Any Outer Wire, % Nominal Cross-section Area
(mm2) Nominal Weight
(kg/m) 15.2 +0.40
-0.20 2 139 15.7 +0.40
-0.20 2 150 12.9 +0.40
-0.20 2 100 785 9.6 +0.30
-0.15 2 55 432

Strength Grade Nominal Dia. (mm) Min. Breaking Strength Min. 0.1% Proof Load Min. Total Elongation at Max. Load Jaw to Jaw Distance (mm) Elongation, % 15.2 232 197 500 3.5 15.7 265 225 12.9 186 158 9.6 102 87

Initial Load Max. Relaxation after hrs, % Low Relaxation 60% Specified min. breaking strength 1.0 70% Specified min. breaking strength 2.5 80% Specified min. breaking strength 4.5

GB/T - eqv. ISO-91(4) PC STAND

Grade Nominal Dia in (mm) Tolerance Dia in (mm) Center Wire Diameter Extra Nominal Steel Area(mm2) Nominal Weight(kg/m） 15.20 +0.40
-0.20 2.5 140 17.80 +0.40
-0.20 2.5 191 9.50 +0.30
-0.15 2.5 54.8 430 12.70 +0.40
-0.20 2.5 98.7 775 15.20 +0.40
-0.20 2.5 140 17.80 +0.40
-0.20 2.5 191

Grade Nominal Dia in (mm) Max. Load，KN Yield Load. KN Elongation % 15.20 241 217 3.5 17.80 327 294 9.50 102 91.8 12.70 184 166 15.20 260 234 17.80 353 318

Inital Load %Max.%Relaxation After hrs Low-Relaxation 70% Specified min.breaking strength 2.5 80% Specified min.breaking strength 4.5

PC Strands

Calculation of weight and outer diameter of coil according to length of PC strands and coil parameters

Calculation of outer diameter of coil and length of PC strands according to weight and coil parameters

Weight and length calculation of PC strands according to coils parameters

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Reinforcement stabilized strands (ropes) have a wide range of application in the construction of complex and responsible trade and
industrial facilities.

The use of multi-strand reinforcing strands instead of rolling reinforcement allows to obtain high strength characteristics with smaller diameters and weight of
the reinforcing structure. The flexibility of the strands greatly facilitates the design of complex structures.

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Production of Reinforcement stabilized strands (ropes) with low relaxation has been started in . New modern equipment for manufacturing of the products which meet all current requirements was installed in -.

New modern production equipment, a testing laboratory equipped for testing of standard and special properties, experienced specialists guarantee the satisfaction of any requests and expectations of the customers.

Reinforced stabilized strands are made in accordance with the requirements of the following standards:

strands according to FprEN -3: “Tensile reinforcement – Part 3: Strand” – according to the design 3- and 7-strands from wire of round or periodic cross-section;

strands according to BS : “Steel wire with high temporary tensile strength and strands from it to create prestress in concrete. Strands”;

strands according to ASTM A 416 / A416M-18 “Standard specifications for 7-wire steel strands without coating for prestressed concrete”. From a wire of only round section;

4. strands (reinforcing ropes) according to GOST -68 “Steel reinforcing ropes 1×7. Technical conditions”;

strands (reinforcing ropes) according to GOST R - “7-wire stabilized reinforcing steel ropes. Technical conditions.”;

reinforcement stabilized strands (ropes) according to SFS – – 3:“Prestressing steels prestressed constructions – Part 3: Strand”

Strands according to national technical assessments based on EN , parts 1 and 3:

Polish national technical assessment ITB-KOT-/ issue 1 “Steel prestressed strands of PJSC“ PA “STALKANAT-SILUR” from smooth wires ”;

Hungarian National Technical Assessment NMÉ: A-16/ and NMÉ: A-27/;

Romanian technical regulation ST 009- “Technical specifications for steel products used as reinforcement: operational requirements and criteria” and Technical agreement 001SC-01 / 275- “Reinforcing strand for prestressed concrete”

APPLICATION:for the reinforcement of prestressed concrete constructions.
DIAMETER: from 6,50 mm up to 15,7 mm.
STRUCTURE: 3-strands wire and 7-strands wire without coating.
MATERIAL:  cold-drawn wire, made of high carbon wire rod of diameter 6,5÷13 mm is used for the reinforcement strands production.
CHEMICAL COMPOSITION OF STEEL:

С, %Mn, %Si, %S, %P, %Cr, %0,70÷0,900,40÷0,700,17÷0,37не более 0,035не более 0,,15÷0,25

At the request of the customer, the strands can be made from indented wire, while the central wire in the strand is made smooth. 3-wire strands can be made from smooth wire and from indented wire.

Prestressed Concrete Strand

Product Overview

prestressed concrete strands are composed of multiple roots of high strength steel wire,It is twisted wire rope.By eliminating stress(stabilizing treatment),the strands are suitable for prestressed concrete or similar purposes.It can help with saving material consumption.

Application of prestressed concrete strand

Composed of multiple roots of high strength steel wire. It has the characteristic of eliminating stress (stabilizing treatment), suitable for prestressed concrete or similar purposes, saving steel consumption, high tensile strength, elongation, low relaxation and stress losses small. The PC Strands has good performance characteristics such as fatigue, belong to high efficiency in steel products technology content is higher, better product quality. PC steel strand is widely used in highways, Bridges, pillow rail, large sports venues, high-rise buildings, airports, ports, docks, nuclear power plants, DAMS, urban overhead road and light rail and other infrastructure areas.

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