What do WLL, MBL and SHF mean for lifting equipment?
Anyone working with lifting equipment—such as hoists, lifting straps, or lifting chains—will inevitably encounter the terms WLL, MBL, and SHF. These are technical designations, but they are essential for safe and responsible lifting. In this article, we explain these terms in plain language, with practical examples from our product range.
- WLL – Working Load Limit:
The WLL is the maximum permissible working load of a lifting device under normal conditions. This is the weight you can safely lift without risk of damage or breakage.
Example :
A chain hoist with a WLL of 1,000 kg may therefore lift a maximum of 1,000 kg when used correctly.
Caution : Exceeding the WLL may lead to dangerous situations and void the warranty and certification.
- MBL – Minimum Breaking Load:
The MBL is the minimum breaking strength of the material. This is the force at which the product is guaranteed to fail.
Rule of thumb :
MBL is often 4 to 7 times higher than WLL, depending on the safety factor.
Example :
A lifting sling with a WLL of 2,000 kg and a safety factor of 7 has a maximum working load (MBL) of 14,000 kg. This margin offers safety during unexpected peak loads, but the MBL is not a working load.
- SHF – Standard Hand Force:
The SHF indicates the standard hand force you must apply to a ratchet or tension strap, for example, to achieve the specified performance.
Example:
For a lashing strap with SHF 50 daN, this means that a manual force of 50 kg has been calculated. This is often combined with STF (Standard Tension Force), which indicates the amount of pre-tension applied to the load.
Why are these values important?
WLL, MBL and SHF help you choose the right products and ensure that you:
Safe lifting and transport, complies with laws and regulations (e.g. Arbo, EN standards), uses equipment responsibly and prevents damage.
At Hijskampioen, you'll find the correct WLL, MBL, or SHF listed in every product specification. Not sure? We're happy to advise you.
Summary:
| Term | Meaning | Important because... |
|---|---|---|
| WLL | Maximum workload | Safe use without overvoltage |
| MBL | Minimum breaking strength | Determines the structural boundary |
| SHF | Standard hand force | Important for lashing straps and hoists |
Questions? Get in touch!
Do you have a lifting application and are unsure about the correct specifications? Feel free to contact our team. We'll help you find solutions, from workshop to offshore.
Team Lifting Champion