Bridge System

Suspension Bridge Suspender Cable Body

The cable body of the suspension bridge suspender is a core load-bearing component of prestressed suspension bridges. As a key structure connecting the main cables and the stiffening girders, it mainly bears and transfers the loads from the stiffening girders, bridge decks and other upper parts to the main cables, which are then supported by the bridge towers and anchorages to ensure the structural stability of the bridge.

It is mostly made of high-strength steel, with mainstream types including parallel steel wire cable bodies and steel strand cable bodies. It is also equipped with anti-corrosion and protection systems such as thermal extrusion PE jackets, galvanized or epoxy coatings, which effectively resist corrosion and fatigue damage. The material, mechanical properties and installation accuracy of the cable body directly affect the load-bearing capacity and service life of the bridge.


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ADVANTAGES

Advantages of the Cable Body of Suspension Bridges :

 

1. Excellent load-bearing performance and strong spanning capacity

Made of high-strength steel wires or steel strands, the cable body has a much higher tensile strength than traditional components such as concrete and ordinary steel, making it a core choice for long-span bridges. The main cable body of suspension bridges can bear huge vertical loads and easily achieve kilometer-level ultra-long spans, which is unmatched by other bridge types.

 

2. Clear force transmission and good structural stability

As a flexible component, the cable body mainly bears tension without complex stresses such as bending moment and shear force, resulting in high material utilization efficiency. The main cable and suspenders transmit forces cooperatively, with a clear load transmission path, high structural redundancy, and strong overall stability.

 

3. Strong material adaptability and excellent durability

Most mainstream cable bodies are made of materials such as galvanized steel wires and epoxy-coated steel strands, which can effectively prevent rust and corrosion. The supporting protective sheaths and anchor systems further improve the weather resistance, enabling the cable body to adapt to harsh environments such as marine and acid rain environments, and achieving a long service life.

 

4. Convenient construction and suitability for large-scale projects

The cable body can be prefabricated in factories and tensioned on-site with a high degree of industrialization, reducing on-site wet operations. Compared with concrete structures, the cable body has a lighter self-weight, which reduces the load on basic structures such as bridge towers and anchorages, and greatly simplifies the construction difficulty of ultra-long-span bridges.

 

5. Low operation and maintenance costs and convenient inspection and replacement

The cable body (especially the suspender cable body) has a mature modular design. In case of damage in the later stage, the damaged cable body can be replaced separately without large-scale demolition of the main bridge body, ensuring high maintenance efficiency, low costs, and the long-term operational safety of the bridge.

 

6. Balancing economy and aesthetics

In ultra-long-span scenarios, the comprehensive cost of the suspension bridge cable body system is lower than that of cable-stayed bridges, steel truss girder bridges and other structures. Meanwhile, the concise form of the cable body integrates with the overall bridge, presenting a light and beautiful visual effect, and combining functionality and ornamental value.


USE

The cable body of the suspension bridge suspender is a core load-bearing component of prestressed suspension bridges. As a key structure connecting the main cables and the stiffening girders, it mainly bears and transfers the loads from the stiffening girders, bridge decks and other upper parts to the main cables, which are then supported by the bridge towers and anchorages to ensure the structural stability of the bridge. 


SPECIFICATIONS

Galvanized Steel Wire Cable

Suspension Bridge Suspender Cable Body

Technical Parameters of Galvanized Steel Wire Cable (Matched with Steel Wire Diameter Φ5, σb≥1670MPa)

Specification & Model

Nominal Cross-sectional Area of Steel Wire Bundle (cm³)

Theoretical Mass of Steel Wire Bundle (kg/m)

Single Black Sheath Structure (Type H)

Double-Layer Structure (Type C, Black Inner Layer & Colored Outer Layer)

Breaking Force (kN)

Matching Anchor Specification

 

Outer Diameter (mm)

Unit Weight of Cable (kg/m)

Outer Diameter (mm)

Unit Weight of Cable (kg/m)

YX.PES5-37

7.26

5.7

45

6.5

49

6.8

1213

LZM/RM5-37

YX.PES5-55

10.08

8.5

51

9.3

55

9.6

1803

LZM/RM5-55

YX.PES5-61

11.98

9.4

55

10.4

59

10.8

2000

LZM/RM5-61

YX.PES5-73

14.33

11.3

59

12.4

63

12.8

2394

LZM/RM5-73

YX.PES5-85

16.69

13.1

61

14.2

65

14.6

2787

LZM/RM5-85

YX.PES5-91

17.87

14.0

65

15.4

69

15.8

2984

LZM/RM5-91

YX.PES5-109

21.40

16.8

68

18.1

72

18.5

3574

LZM/RM5-109

YX.PES5-121

23.76

18.7

71

20.0

75

20.4

3968

LZM/RM5-121

YX.PES5-127

24.94

19.6

75

21.2

79

21.7

4164

LZM/RM5-127

YX.PES5-139

27.29

21.4

78

23.2

82

23.7

4558

LZM/RM5-139

YX.PES5-151

29.65

23.3

79

24.9

83

25.4

4951

LZM/RM5-151

Elastic Modulus of Suspender CableE1.9x105MPa



Technical Parameters of Galvanized Steel Wire Cable (Matched with Steel Wire Diameter Φ7, σb≥1670MPa)

Specification & Model

Nominal Cross-sectional Area of Steel Wire Bundle (cm³)

Theoretical Mass of Steel Wire Bundle (kg/m)

Single Black Sheath Structure (Type H)

Double-Layer Structure (Type C, Black Inner Layer & Colored Outer Layer)

Breaking Force (kN)

Matching Anchor Specification

 

Outer Diameter (mm)

Unit Weight of Cable (kg/m)

Outer Diameter (mm)

Unit Weight of Cable (kg/m)

YX.PES7-37

14.24

11.2

61

12.4

65

12.8

2378

LZM/RM7-37

YX.PES7-55

21.17

16.6

68

17.9

72

18.3

3535

LZM/RM7-55

YX.PES7-61

23.48

18.4

73

20.0

77

20.5

3935

LZM/RM7-61

YX.PES7-73

28.09

22.1

78

23.7

82

24.2

4692

LZM/RM7-73

YX.PES7-85

32.71

25.7

83

27.5

87

28.0

5463

LZM/RM7-85

YX.PES7-91

35.02

27.5

89

29.8

93

30.4

5848

LZM/RM7-91

YX.PES7-109

41.95

32.9

93

35.1

97

35.7

7005

LZM/RM7-109

Elastic Modulus of Suspender CableE1.9x105MPa




Epoxy Coated Steel Wire Cable

Suspension Bridge Suspender Cable Body

Technical Parameters of Epoxy Coated Steel Wire Cable (Matched with Steel Wire Diameter Φ5, σb=1670MPa)

Specification & Model

Nominal Cross-sectional Area of Steel Wire Bundle (cm³)

Theoretical Mass of Steel Wire Bundle (kg/m)

Single Black Sheath Structure (Type H)

Double-Layer Structure (Type C, Black Inner Layer & Colored Outer Layer)

Breaking Force (kN)

Matching Anchor Specification

 

Outer Diameter (mm)

Unit Weight of Cable (kg/m)

Outer Diameter (mm)

Unit Weight of Cable (kg/m)

YX.PES.E5-37

7.26

5.7

49

6.8

53

7.1

1213

LZM/RM5-37

YX.PES.E5-55

10.80

8.5

55

9.6

59

10.0

1803

LZM/RM5-55

YX.PES.E5-61

11.98

9.4

60

10.9

64

11.3

2000

LZM/RM5-61

YX.PES.E5-73

14.33

11.3

63

12.7

67

13.1

2394

LZM/RM5-73

YX.PES.E5-85

16.69

13.1

66

14.6

70

15.0

2787

LZM/RM5-85

YX.PES.E5-91

17.87

14.0

71

15.9

75

16.4

2984

LZM/RM5-91

YX.PES.E5-109

21.40

16.8

74

18.6

78

19.1

3574

LZM/RM5-109

YX.PES.E5-121

23.76

18.7

77

20.6

81

21.1

3968

LZM/RM5-121

YX.PES.E5-127

24.94

19.6

84

22.3

88

22.9

4164

LZM/RM5-127

YX.PES.E5-139

27.29

21.4

84

23.7

88

24.2

4558

LZM/RM5-139

YX.PES.E5-151

29.65

23.3

86

25.7

90

26.2

4951

LZM/RM5-151

Elastic Modulus of Suspender CableE1.9x105MPa



Technical Parameters of Epoxy Coated Steel Wire Cable (Matched with Steel Wire Diameter Φ7, σb=1670MPa)

Specification & Model

Nominal Cross-sectional Area of Steel Wire Bundle (cm³)

Theoretical Mass of Steel Wire Bundle (kg/m)

Single Black Sheath Structure (Type H)

Double-Layer Structure (Type C, Black Inner Layer & Colored Outer Layer)

Breaking Force (kN)

Matching Anchor Specification

 

Outer Diameter (mm)

Unit Weight of Cable (kg/m)

Outer Diameter (mm)

Unit Weight of Cable (kg/m)

YX.PES.E7-37

14.24

11.2

62

12.4

66

12.8

2378

LZM/RM7-37

YX.PES.E7-55

21.17

16.6

71

18.0

75

18.4

3535

LZM/RM7-55

YX.PES.E7-61

23.48

18.4

77

20.1

81

20.6

3920

LZM/RM7-61

YX.PES.E7-73

28.09

22.1

84

24.1

88

24.6

4692

LZM/RM7-73

YX.PES.E7-85

32.71

25.7

87

27.6

91

28.2

5463

LZM/RM7-85

YX.PES.E7-91

35.02

27.5

93

30.0

95

30.5

5848

LZM/RM7-91

YX.PES.E7-109

41.95

32.9

100

35.6

104

36.2

7005

LZM/RM7-109

Elastic Modulus of Suspender CableE1.9x105MPa




New Type Low-Stress Corrosion-Resistant Cable


PES(FD) cable is an improved PES stay cable. It is a fully corrosion-resistant cable with double-layer HDPE protection.

The improved cable features the following special properties:

An isolation layer is installed between the two layers of HDPE. When the suspender is under static load, the outer HDPE layer can effectively release stress, keeping it operating at a low stress level, which significantly mitigates HDPE stress cracking.

Suspension Bridge Suspender Cable Body

Technical Parameters of New Type Low-Stress Corrosion-Resistant Cable (Matched with Steel Wire Diameter Φ7, σb=1670MPa)

Specification & Model

Nominal Cross-Sectional Area of Steel Wire Bundle (cm³)

Theoretical Mass of Steel Wire Bundle (kg/m)

Outer Diameter of Stay Cable (mm)

Diameter of Steel Wire Bundle (mm)

Breaking Force (kN)

Design Cable Force K=3 (kN)

Matching Anchor Specification

YX.PES(FD)7-37

14.24

11.2

65

51

2378

793

LZM/RM7-37

YX.PES(FD)7-55

21.17

16.6

72

58

3535

1178

LZM/RM7-55

YX.PES(FD)7-61

23.48

18.4

77

63

3920

1307

LZM/RM7-61

YX.PES(FD)7-73

28.0

22.1

82

68

4692

4564

LZM/RM7-73

YX.PES(FD)7-85

32.71

25.7

93

71

5463

1821

LZM/RM7-85

YX.PES(FD)7-91

35.02

27.5

93

77

5848

1949

LZM/RM7-91

YX.PES(FD)7-109

41.95

32.9

97

81

7005

2335

LZM/RM7-109




Epoxy Stay Cable

Suspension Bridge Suspender Cable Body

Technical Parameters of Extruded Stay Cable

Stay Cable Model

Nominal Cross-Sectional Area of Steel Wire Bundle cm2

Unit Mass of Cable Body kg/m

Outer Diameter of Cable Body mm

Nominal Breaking Cable ForceKN

YX.GJ15-3

4.2

4.73

50

780

YX.GJ15-4

5.6

5.93

54

1040

YX.GJ15-5

7.0

7.32

65

1300

YX.GJ15-6

8.4

8.56

65

1560

YX.GJ15-7

9.8

9.79

65

1820

YX.GJ15-9

12.6

13.21

85

2340

YX.GJ15-12

16.8

16.65

85

3120

YX.GJ15-15

21.0

21.42

105

3900

YX.GJ15-19

26.6

25.84

105

4940

YX.GJ15-22

30.8

30.59

117

5720

YX.GJ15-25

35.0

34.69

126

6500

YX.GJ15-27

37.8

36.81

126

7020

YX.GJ15-31

43.4

41.89

130

8060

YX.GJ15-37

51.8

50.28

145

9620


PACKAGE

Packaging:

1) All the products are packed with seaworthy packing.
2) Customer's special requirement for packing can be satisfied.
3) Air freight, sea freight and truck freight are all available.


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