Frequently asked questions

General Suitability Criteria

Application Types:

• Lifting: Requires equipment designated as a "hoist" with a higher safety factor (typically 5:1).
• Pulling: May use a "winch" or "puller," often with a safety factor of 3:1. Note that equipment rated only for pulling must never be used for vertical lifting.
• Securing: Tools like the Tiger TRPA Wire Rope Series or Yaletrac are versatile multi-purpose devices designed to tension and secure loads in all directions.
• Load Capacity: Always verify that the total weight (including accessories) does not exceed the manufacturer's marked SWL for your specific configuration.
• Grip & Compatibility: For wire ropes or metal rods, devices like the Yale LMG Cable/Wire Rope Grips provide a non-slip grip without damaging the cable, provided the cable diameter matches the grip's specifications.
• Environmental Factors: For outdoor or marine use, prioritise corrosion-resistant materials like galvanised steel or stainless steel.

If you are still unsure get in touch with our team.

To determine the correct weight or load capacity, you must calculate the Total Applied Load and apply a Safety Factor. Choosing a capacity that is too close to your actual weight can lead to equipment fatigue or catastrophic failure.

Calculate the Static Load

The "Static Load" is the dead weight of the item you are moving. However, you must also include the weight of all "below-the-hook" components, such as:

• Slings and chains.
• Shackles and hooks.
• Spreader bars or specialized grips.

Factor in Dynamic Forces (Shock Loading)

If the load will be moved quickly, jerked, or exposed to wind, the effective weight increases significantly.

• Lifting: A sudden stop or start can double the stress on the equipment.
• Pulling: Friction (dragging a load across a surface) adds resistance that requires a higher capacity than the weight of the object itself.

Understanding Capacity Ratings

When selecting a product, look for these specific terms:

• WLL (Working Load Limit): The maximum mass or force which the product is authorized to support in general service.

• SWL (Safe Working Load): The specific load that can be lifted in a particular configuration (e.g., using a pulley block to create a 2:1 mechanical advantage doubles your pulling capacity but halves the speed).

• MBL (Minimum Breaking Load): The force at which the item is expected to break. Never use MBL as a guide for daily operations.

General "Rule of Thumb"

The 80% Rule: For longevity and safety, many professionals aim to utilize only80% of the rated capacity for frequent use. This provides a buffer for unexpected stressors and reduces wear and tear on the machinery.

If you are still unsure get in touch with our team.