Junwei wire rope

Shanghai Junwei Wire Rope & Sling Co., Ltd. (JWGSS) is a Chinese manufacturer specializing in steel wire ropes, lifting slings, synthetic fiber ropes, and rigging hardware. The company is headquartered in Shanghai, China, and serves industries such as construction, marine, offshore, power generation, metallurgy, ports, heavy machinery, and infrastructure projects.

JWGSS provides integrated lifting and rigging solutions, offering both standard products and customized assemblies to meet specific industrial requirements. Their products are widely used in lifting, hoisting, load securing, and heavy-duty industrial applications worldwide.

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Main Product Categories

1. Steel Wire Ropes

High-strength steel wire ropes for lifting and load-bearing applications.

Typical Types

• Galvanized steel wire ropes

• Bright (plain) steel wire ropes

• Plastic-coated steel wire ropes

Applications

• Cranes

• Construction machinery

• Elevators

• Port equipment

• Heavy industrial lifting systems

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2. Synthetic Fiber Ropes

Lightweight, corrosion-resistant ropes for marine and industrial use.

Typical Materials

• Aramid fiber

• Polyester

• Nylon

• UHMWPE (Ultra-High-Molecular-Weight Polyethylene)

Applications

• Marine and offshore operations

• Lightweight lifting systems

• Load securing

• Industrial rope replacement solutions

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3. Lifting Slings & Rigging Products

Complete lifting sling assemblies for industrial load handling.

Typical Products

• Wire rope slings

• Chain slings

• Pressed steel rigging assemblies

• Hand-spliced rope assemblies

• Cast rigging fittings

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4. Lifting Accessories & Hardware

Essential hardware for connecting and securing lifting systems.

Typical Products

• Shackles

• Eye nuts and lifting rings

• Rope clips

• Cable clamps

• Swivel links

• Connectors and fittings

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Industry Applications

JWGSS products are used in:

• Construction and heavy lifting

• Marine and offshore platforms

• Port and container handling systems

• Power plants and renewable energy projects

• Steel mills and metallurgical facilities

• Bridge construction and infrastructure

• Oil and petrochemical industries

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Company Strengths

• Broad product portfolio covering wire ropes, fiber ropes, slings, and accessories

• Custom lifting solutions available

• Export-oriented manufacturing experience

• Focus on safety, durability, and cost-effectiveness

• Technical support for pre-sale and after-sale services

Steel Wire Rope Construction & Structure List

Steel wire ropes are classified by number of strands × number of wires per strand, as well as by core type and lay type.

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1. 6-Strand Constructions (Most Common Industrial Types)

6×7 Class (6×7 + FC / IWRC)

• Construction: 6 strands with 7 wires per strand

• High abrasion resistance

• Lower flexibility

• Suitable for static applications

Typical Variants

• 6×7 + FC

• 6×7 + IWRC

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6×19 Class (General Purpose Rope)

Widely used in lifting and general applications.

Common Variations

• 6×19 + FC

• 6×19 + IWRC

• 6×19 Seale (S)

• 6×19 Warrington (W)

• 6×19 Filler Wire (FW)

Applications

• Cranes

• Hoists

• General lifting

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6×24 / 6×25 Class

Balanced flexibility and wear resistance.

Typical Constructions

• 6×24 + FC

• 6×24 + IWRC

• 6×25 Filler Wire

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6×36 Class (High Flexibility Rope)

Higher wire count per strand → more flexible.

Typical Constructions

• 6×36 + FC

• 6×36 + IWRC

• 6×36 Warrington-Seale

• 6×36 Compact

Applications

• Tower cranes

• Mobile cranes

• Heavy lifting

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6×37 Class

Very flexible rope for dynamic applications.

• 6×37 + FC

• 6×37 + IWRC

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2. 8-Strand Constructions

Used for improved flexibility and rotation resistance.

• 8×19 + FC

• 8×19 + IWRC

• 8×25

• 8×36

Applications

• Offshore

• Marine

• Winches

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3. Rotation-Resistant & Non-Rotating Ropes

Designed to minimize rope rotation under load.

Common Structures

• 19×7

• 18×7

• 35×7

• 19×19

Applications

• Tower cranes

• Lifting heavy suspended loads

• High-rise construction

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4. Compacted & Swaged Ropes

Higher breaking load and smoother surface.

• 6×36 Compact

• 8×K36 Compact

• 35×7 Compact

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Core Types

FC – Fiber Core

• More flexible

• Lower breaking strength

• Better lubrication retention

IWRC – Independent Wire Rope Core

• Higher strength

• Better crush resistance

• Preferred for heavy lifting

WSC – Wire Strand Core

• Intermediate strength and flexibility

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Lay Types

Regular Lay

• Wires and strands laid in opposite directions

• More stable, less rotation

Lang Lay

• Wires and strands laid in same direction

• More abrasion resistant

• Better fatigue resistance

Alternate Lay

• Combination of regular and Lang lay

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Typical Surface Finishes

• Bright (ungavanized)

• Galvanized

• Plastic-coated

• Compacted

• Lubricated

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Example Product Specification Format (For Quotation)

Example 1:

6×36 IWRC, Right Regular Lay, Galvanized, 18mm Diameter

Example 2:

19×7 Rotation Resistant, IWRC, Lang Lay, 16mm Diameter

Comparison: Standard Steel Wire Rope vs. Rotation-Resistant Wire Rope

Steel wire ropes are generally classified into standard (conventional) constructions and rotation-resistant constructions based on their structural behavior under load.

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1. Structural Difference

Standard Steel Wire Rope

• Typical constructions: 6×19, 6×36, 6×37

• Consists of 6 or 8 outer strands laid around a core (FC, WSC, or IWRC)

• Designed primarily for strength and flexibility

• Not specifically designed to prevent rotation under load

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Rotation-Resistant Wire Rope

• Typical constructions: 19×7, 18×7, 35×7

• Multi-layer strand design (inner strands laid opposite to outer strands)

• Engineered to reduce or eliminate rope rotation under load

• Also referred to as non-rotating rope (though true zero rotation does not exist)

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2. Behavior Under Load

Feature	Standard Rope	Rotation-Resistant Rope
Rotation under load	Will rotate when freely suspended	Significantly reduced rotation
Load stability	Load may spin	Load remains stable
Suitability for single-line lifting	Limited	Excellent
Multi-layer drum winding	Good	More sensitive

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3. Typical Applications

Standard Steel Wire Rope

• General cranes

• Winches

• Hoists

• Static load applications

• Multi-fall reeving systems

Best used when:

• Load rotation is not critical

• Rope is part of multi-part lifting system

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Rotation-Resistant Wire Rope

• Tower cranes

• Mobile cranes (single-line operation)

• High-rise construction

• Lifting of long or sensitive loads

• Situations where load spinning is dangerous

Best used when:

• Load is freely suspended

• Single-fall lifting is required

• Rotation control is critical for safety

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4. Advantages & Disadvantages

Standard Rope

Advantages

• Lower cost

• Stronger outer strands

• Better abrasion resistance

• Easier inspection

• Longer service life in multi-layer drum applications

Disadvantages

• Load rotation occurs under tension

• Not suitable for single-line vertical lifting of heavy loads

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Rotation-Resistant Rope

Advantages

• Minimizes load spinning

• Ideal for single-fall lifting

• Safer for high-lift applications

Disadvantages

• More complex structure

• Higher cost

• More sensitive to improper handling

• Can be damaged more easily if shock-loaded

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5. Core Comparison

Factor	Standard Rope	Rotation-Resistant Rope
Structure	6 or 8 strand	Multi-layer strand
Rotation control	No	Yes
Cost	Lower	Higher
Abrasion resistance	Higher (generally)	Moderate
Ideal for tower cranes	No	Yes
Ideal for general lifting	Yes	Sometimes over-specified

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6. Selection Guideline

Choose Standard Steel Wire Rope when:

• Cost efficiency is important

• Multi-part reeving is used

• Rotation is not a safety concern

Choose Rotation-Resistant Rope when:

• Single-fall lifting

• Tall structure lifting (tower crane)

• Load stability is critical

• Operator safety requires minimal load spinning

 

Recommended Steel Wire Rope Constructions for Crane Applications

Selecting the correct wire rope construction for crane applications is critical for safety, durability, and performance. The selection depends on lifting method, reeving system, drum type, and whether load rotation control is required.

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1. Quick Selection Table by Crane Type

Crane Type	Typical Reeving	Recommended Rope Construction	Core Type	Notes
Tower Crane (Single Fall)	Single-line	19×7, 35×7 (Rotation Resistant)	IWRC	Prevents load spinning
Mobile Crane (Single Fall)	Single-line	19×7, 35×7	IWRC	Essential for tall lifts
Mobile Crane (Multi-fall)	Multi-part	6×36, 6×37	IWRC	Rotation less critical
Crawler Crane	Multi-part	6×36, 6×37	IWRC	High flexibility required
Overhead Crane	Multi-part	6×36, 6×19	IWRC or FC	Cost-effective option
Gantry Crane	Multi-part	6×36	IWRC	Good fatigue resistance
Port Crane / Container Crane	Multi-part	8×36, 6×36 Compact	IWRC	Heavy-duty use
Winch Applications	Single-layer drum	6×19, 6×36	IWRC	Abrasion resistant
High-Rise Construction	Single-line	35×7	IWRC	Rotation control critical

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2. Selection Based on Lifting Method

A. Single-Fall Lifting (Free-Hanging Load)

Recommended:

• 19×7

• 18×7

• 35×7

Why?

• Minimizes rope rotation

• Prevents load spinning

• Required for tall lifting heights

Core: IWRC only

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B. Multi-Part Reeving (Multi-Fall System)

Recommended:

• 6×36

• 6×37

• 6×19

Why?

• Rotation naturally balanced by reeving system

• Better abrasion resistance

• Longer service life

Core:

• Heavy duty → IWRC

• Light duty → FC possible

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3. Selection Based on Drum Type

Single-Layer Drum

• 6×19

• 6×36

• 8×36

Multi-Layer Drum

• 6×36 Compact

• 8×K36

• 35×7 (only if rotation control required)

Note:
Rotation-resistant ropes are more sensitive in multi-layer drum conditions.

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4. Recommended Constructions by Duty Level

Duty Level	Recommended Structure
Light duty	6×19 + FC
Medium duty	6×36 + IWRC
Heavy duty	6×36 Compact + IWRC
Extreme height	35×7 + IWRC

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5. Practical Engineering Guidelines

Use 6×36 IWRC when:

• General-purpose crane lifting

• Good balance between flexibility and strength

• Most common universal crane rope

Use 6×19 IWRC when:

• Abrasion resistance is more important

• Lower bending cycles

Use 35×7 IWRC when:

• Single-line tower crane

• Load spinning must be minimized

• High-rise construction

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6. Sample Specification Format for Crane Quotation

Example 1:

6×36 IWRC, Right Regular Lay, Compacted, 18 mm Diameter, Galvanized

Example 2:

35×7 Rotation Resistant, IWRC, 16 mm Diameter, Non-Compacted

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7. Important Safety Note

Rotation-resistant ropes:

• Must not be shock loaded

• Must be handled carefully during installation

• Require correct spooling procedures

Improper use can cause internal structural damage.

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Props tower

 

Props tower

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Push-Pull Props

 

Push-Pull props made of aluminum alloy, light and easy to operate, good operability, easy and quick adjustment.

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Shorting props

 Kayo Shoji Manufacture two different models of the DIN EN 1065 Class props(30A ECO, 40A ECO) and six different models of the DIN EN 1065 class B props(30B ECO, 30B, 35B ECO, 35B, 40B ECO, 40B)

These are classified according to maximum etension(this model is capable of covering extensions between 1.69m and 4.00m) and capacity(higher with closed configuration)

Below are the technical features of each one of them.

DIN EN 1065 Class A & Class B Props – Loads Table

Class	ITEM No.	Extension max. (m)	Extension min. (m)	Working Load (kN)	Typical Breaking Strength (kN) (GUNSTEN / DIN EN 1065)
A30	GST-30A ECO	3.00	1.69	10	17.5 / 17.0
A40	GST-40A ECO	4.00	2.20	10	13.3 / 12.8
B30	GST-30B ECO	3.00	1.69	15	22.9 / 22.7
B30	GST-30B	3.00	1.69	20	24.9 / 22.7
B35	GST-35B ECO	3.50	2.07	15	20.7 / 19.4
B35	GST-35B	3.50	2.07	15	22.4 / 19.4
B40	GST-40B ECO	4.00	2.19	10	17.8 / 17.0
B40	GST-40B	4.00	2.19	10	19.4 / 17.0

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Dimensional Table

Class	ITEM No.	Inner Tube (mm)	Outer Tube (mm)	Top/Base Plates (mm)	N.W. (kg)	Surface Preparation
A30	GST-30A ECO	48	60	110 × 110 × 5	11.9	Electroplate / Spray
A40	GST-40A ECO	48	60	110 × 110 × 5	14.3	Electroplate / Spray
B30	GST-30B ECO	48	60	120 × 120 × 6	14.5	Hot-dip Galvanizing
B30	GST-30B	48	60	120 × 120 × 8	16.2	Hot-dip Galvanizing
B35	GST-35B ECO	48	60	120 × 120 × 6	16.8	Hot-dip Galvanizing
B35	GST-35B	48	60	120 × 120 × 8	19.6	Hot-dip Galvanizing
B40	GST-40B ECO	48	60	120 × 120 × 6	19.2	Hot-dip Galvanizing
B40	GST-40B	48	60	120 × 120 × 8	21.1	Hot-dip Galvanizing

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ภาษาไทย

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ตารางค่ารับน้ำหนักของขาตั้งมาตรฐาน DIN EN 1065 Class A & B

คลาส	รหัสรุ่น	การยืดขยายสูงสุด (ม.)	การยืดขยายต่ำสุด (ม.)	รับน้ำหนักใช้งาน (กกก.)	ความต้านแรงหักเฉลี่ย (กิโลนิวตัน) (GUNSTEN / DIN EN 1065)
A30	GST-30A ECO	3.00	1.69	10	17.5 / 17.0
A40	GST-40A ECO	4.00	2.20	10	13.3 / 12.8
B30	GST-30B ECO	3.00	1.69	15	22.9 / 22.7
B30	GST-30B	3.00	1.69	20	24.9 / 22.7
B35	GST-35B ECO	3.50	2.07	15	20.7 / 19.4
B35	GST-35B	3.50	2.07	15	22.4 / 19.4
B40	GST-40B ECO	4.00	2.19	10	17.8 / 17.0
B40	GST-40B	4.00	2.19	10	19.4 / 17.0

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ตารางมิติ

คลาส	รหัสรุ่น	ท่อด้านใน (มม.)	ท่อด้านนอก (มม.)	แผ่นรองบน–ล่าง (มม.)	น.น.สุทธิ (กก.)	การเตรียมผิว
A30	GST-30A ECO	48	60	110 × 110 × 5	11.9	ชุบเคลือบสี / สเปรย์
A40	GST-40A ECO	48	60	110 × 110 × 5	14.3	ชุบเคลือบสี / สเปรย์
B30	GST-30B ECO	48	60	120 × 120 × 6	14.5	ชุบกัลวาไนซ์แบบจุ่มร้อน
B30	GST-30B	48	60	120 × 120 × 8	16.2	ชุบกัลวาไนซ์แบบจุ่มร้อน
B35	GST-35B ECO	48	60	120 × 120 × 6	16.8	ชุบกัลวาไนซ์แบบจุ่มร้อน
B35	GST-35B	48	60	120 × 120 × 8	19.6	ชุบกัลวาไนซ์แบบจุ่มร้อน
B40	GST-40B ECO	48	60	120 × 120 × 6	19.2	ชุบกัลวาไนซ์แบบจุ่มร้อน
B40	GST-40B	48	60	120 × 120 × 8	21.1	ชุบกัลวาไนซ์แบบจุ่มร้อน

DIN EN 1065 Class C Props – Loads Table

We at KAYO SHOJI manufacture five different models of the DIN EN 1065 class C props: 35C, 40C, 45C, 50C and 55C. These are classified according to maximum extension (covering 2.07 m to 5.50 m) and guaranteed capacity (higher when closed).

Class	ITEM No.	Extension max. (m)	Extension min. (m)	Working Load (kN)	Typical Breaking Strength (kN) (GUNSTEN / DIN EN 1065)
C35	GST-35C	3.50	2.07	30	39.7 / 29.1
C40	GST-40C	4.00	2.20	30	36.6 / 25.5
C45	GST-45C	4.50	2.55	25	34.0 / 22.7
C50	GST-50C	5.00	2.83	25	30.1 / 20.4
C55	GST-55C	5.50	3.05	20	22.7 / 18.6

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Dimensional Table

Class	ITEM No.	Inner Tube (mm)	Outer Tube (mm)	Top/Base Plates (mm)	N.W. (kg)	Surface Preparation
C35	GST-35C	48.0	60	120 × 120 × 8	20.9	Hot-Dip Galvanizing
C40	GST-40C	63.5	76	140 × 140 × 8	24.2	Hot-Dip Galvanizing
C45	GST-45C	63.5	76	140 × 140 × 8	29.1	Hot-Dip Galvanizing
C50	GST-50C	63.5	76	140 × 140 × 8	31.9	Hot-Dip Galvanizing
C55	GST-55C	63.5	76	140 × 140 × 8	34.4	Hot-Dip Galvanizing

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ภาษาไทย

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ตารางค่ารับน้ำหนักของขาตั้งมาตรฐาน DIN EN 1065 Class C

บริษัท KAYO SHOJI ผลิตขาตั้งมาตรฐาน DIN EN 1065 รุ่น Class C จำนวน 5 รุ่น ได้แก่ 35C, 40C, 45C, 50C และ 55C แต่ละรุ่นจำแนกตามความยาวขยายสูงสุด (2.07 ม.–5.50 ม.) และความสามารถรับน้ำหนักที่รับประกัน (สูงขึ้นเมื่อปิดเกลียวเต็มที่)

คลาส	รหัสรุ่น	ขยายสูงสุด (ม.)	ขยายต่ำสุด (ม.)	น้ำหนักใช้งาน (kN)	ความต้านแรงหักเฉลี่ย (kN) (GUNSTEN / DIN EN 1065)
C35	GST-35C	3.50	2.07	30	39.7 / 29.1
C40	GST-40C	4.00	2.20	30	36.6 / 25.5
C45	GST-45C	4.50	2.55	25	34.0 / 22.7
C50	GST-50C	5.00	2.83	25	30.1 / 20.4
C55	GST-55C	5.50	3.05	20	22.7 / 18.6

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ตารางมิติ

คลาส	รหัสรุ่น	ท่อด้านใน (มม.)	ท่อด้านนอก (มม.)	แผ่นรองบน–ล่าง (มม.)	น.น.สุทธิ (กก.)	การเตรียมผิว
C35	GST-35C	48.0	60	120 × 120 × 8	20.9	ชุบกัลวาไนซ์แบบจุ่มร้อน
C40	GST-40C	63.5	76	140 × 140 × 8	24.2	ชุบกัลวาไนซ์แบบจุ่มร้อน
C45	GST-45C	63.5	76	140 × 140 × 8	29.1	ชุบกัลวาไนซ์แบบจุ่มร้อน
C50	GST-50C	63.5	76	140 × 140 × 8	31.9	ชุบกัลวาไนซ์แบบจุ่มร้อน
C55	GST-55C	63.5	76	140 × 140 × 8	34.4	ชุบกัลวาไนซ์แบบจุ่มร้อน

DIN EN 1065 Class D Props – Loads Table

We at KAYO SHOJI manufacture three different models of the DIN EN 1065 class D props: 30D, 35D and 40D. These are classified by their maximum extension (1.69 m to 4.00 m) and guaranteed working capacity (higher when closed).

Class	ITEM No.	Extension max. (m)	Extension min. (m)	Working Load (kN)	Typical Breaking Strength (kN) (GUNSTEN / DIN EN 1065)
D30	GST-30D	3.00	1.69	30	34.0 / 34.0
D35	GST-35D	3.50	2.07	30	41.4 / 34.0
D40	GST-40D	4.00	2.20	30	43.8 / 34.0

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Dimensional Table

Class	ITEM No.	Inner Tube (mm)	Outer Tube (mm)	Top/Base Plates (mm)	N.W. (kg)	Surface Preparation
D30	GST-30D	48.0	60	120 × 120 × 8	17.6	Hot-Dip Galvanizing
D35	GST-35D	63.5	76	140 × 140 × 8	22.2	Hot-Dip Galvanizing
D40	GST-40D	63.5	76	140 × 140 × 8	25.3	Hot-Dip Galvanizing

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ภาษาไทย

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ตารางค่ารับน้ำหนักของขาตั้ง DIN EN 1065 Class D

บริษัท KAYO SHOJI ผลิตขาตั้งมาตรฐาน DIN EN 1065 รุ่น Class D จำนวน 3 รุ่น ได้แก่ 30D, 35D และ 40D แต่ละรุ่นจำแนกตามความยาวขยายสูงสุด (1.69 ม. – 4.00 ม.) และความสามารถรับน้ำหนักใช้งานที่รับประกัน (สูงขึ้นเมื่อปิดเกลียวเต็มที่)

คลาส	รหัสรุ่น	ขยายสูงสุด (ม.)	ขยายต่ำสุด (ม.)	รับน้ำหนักใช้งาน (kN)	ความต้านแรงหักเฉลี่ย (kN) (GUNSTEN / DIN EN 1065)
D30	GST-30D	3.00	1.69	30	34.0 / 34.0
D35	GST-35D	3.50	2.07	30	41.4 / 34.0
D40	GST-40D	4.00	2.20	30	43.8 / 34.0

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ตารางมิติ

คลาส	รหัสรุ่น	ท่อด้านใน (มม.)	ท่อด้านนอก (มม.)	แผ่นรองบน–ล่าง (มม.)	น.น.สุทธิ (กก.)	การเตรียมผิว
D30	GST-30D	48.0	60	120 × 120 × 8	17.6	ชุบกัลวาไนซ์แบบจุ่มร้อน
D35	GST-35D	63.5	76	140 × 140 × 8	22.2	ชุบกัลวาไนซ์แบบจุ่มร้อน
D40	GST-40D	63.5	76	140 × 140 × 8	25.3	ชุบกัลวาไนซ์แบบจุ่มร้อน

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