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This professional content is tailored for your ISO APPROVED Apex Global WLS 4-Legged Chain
Sling product page. It is structured to build trust with procurement
managers and safety officers by highlighting technical reliability and
industrial versatility.
Engineered for
heavy-duty industrial lifting, our 4-legged chain sling provides the ultimate
balance of stability, load distribution, and safety. Constructed from
high-strength Grade 80 alloy steel, this assembly is designed to meet the
rigorous demands of manufacturing, construction, and heavy infrastructure
projects.
·
Superior Stability: The 4-leg configuration allows for secure, balanced lifting of complex
loads, ensuring the weight is distributed evenly across all points.
·
Grade 80 Alloy Steel: Offers an exceptional strength-to-weight ratio,
high wear resistance, and the ability to withstand harsh industrial
environments, including exposure to heat and sharp edges.
·
Fully Certified: Each assembly is supplied with a comprehensive inspection tag and
meets applicable safety standards for guaranteed performance.
·
Positive Hook Engagement: Equipped with heavy-duty safety latch hooks,
ensuring the load remains secure throughout the entire lift cycle.
·
Versatile Application: Adaptable to various rigging configurations, making
it the preferred choice for heavy machinery and structural components.
·
Heavy Manufacturing: Lifting large steel structures, motors, and heavy
machinery components.
·
Construction: Managing prefabricated concrete panels, steel beams, and heavy
materials on-site.
·
Logistics & Ports: Efficient, safe loading and unloading of heavy
industrial containers and equipment.
·
Maintenance & Repair: Providing safe lifting solutions for heavy engine
blocks and plant equipment during maintenance shutdowns.
Note: The WLL of
a chain sling is dependent on the angle of the legs. As the angle of the legs
increases, the effective working load limit decreases.
Standard WLL Guideline (Grade 80):
|
Angle to Vertical |
WLL Reduction Factor |
|
0° – 45° |
100% of
Rated WLL |
|
45° – 60° |
70% of
Rated WLL |
(Recommendation:
To maximize safety, avoid lifting at an angle greater than 60° from the
vertical.)
·
Material: High-Tensile Alloy Steel (Grade 80).
·
Configuration: 4-Legged with Master Link assembly.
·
Finish: Corrosion-resistant coating for long service life.
·
Safety Features: High-visibility yellow powder-coated hooks with spring-loaded positive
locking latches.
·
Compliance: Designed to meet international industrial safety and lifting
standards.
·
Customization: I offer different chain diameters (e.g., 6mm, 8mm, 10mm, 13mm), I
recommend adding a specific table on your website that lists the WLL for each
specific diameter at 0-45° and 45-60° angles. This is exactly what engineers
look for when ordering.
To provide
engineers and procurement officers with the necessary technical data, the
following table outlines the Working Load Limits (WLL) for Grade 80 Alloy
Steel 4-Legged Chain Slings.
These values are
calculated based on standard engineering practices where the load distribution
changes as the angle of the legs increases from the vertical.
It is essential for
your technical documentation to explain why these values decrease as the
angle widens. When a sling is rigged at an angle, the tension in each leg
increases due to the horizontal component of the force.
·
Vertical Lift (0°): The load is distributed equally across all legs, providing maximum
WLL.
·
Angled Lift (45°-60°): As the angle from the vertical increases, the legs
must support not only the weight of the load but also the induced horizontal
force (stress) caused by the angle.
·
The 3-Leg Rule: In a 4-legged sling, it is standard engineering safety practice to
rate the assembly based on the assumption that only three legs are bearing the
load simultaneously, as it is mathematically difficult to ensure that all four
legs are tensioned equally in real-world conditions.
Important
Safety Notice:
·
All WLL values provided are based on the standard use of Grade 80 alloy
steel chain slings in a uniform load environment.
·
These values are intended as a guideline. Always refer to the specific
test certificate provided with your equipment for precise load capacities.
·
Ensure the angle between legs never exceeds 60° from the vertical.
Exceeding this angle will result in a rapid decline in the WLL, posing a
significant safety risk.
·
Regular inspection for wear, deformation, and elongation is mandatory
to ensure the continued integrity of these ratings.
·
Note: Data based on Grade 80
alloy steel components. For 4-legged slings, the WLL is calculated as 2.1 times
the WLL of a single leg at 0-45°, and 1.5 times the single leg WLL at 45-60°
(using the standard assumption that only three legs are effectively supporting
the load).
|
Chain Diameter (mm) |
1-Leg WLL (Tonnes) |
WLL at 0-45° Angle (Tonnes) |
WLL at 45-60° Angle (Tonnes) |
|
6 mm |
1.12 |
2.36 |
1.70 |
|
8 mm |
2.00 |
4.25 |
3.00 |
|
10 mm |
3.15 |
6.70 |
4.75 |
|
13 mm |
5.30 |
11.20 |
8.00 |
|
16 mm |
8.00 |
17.00 |
11.80 |
|
20 mm |
12.50 |
26.50 |
19.00 |
|
22 mm |
15.00 |
31.50 |
22.40 |
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