Wll vs Swl???

[arbornaught]

Right so, what's the difference or are they the same?

 

 

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[Arctostaphylos uva-ursi]

LMGTFY

[treequip]

Right so, what's the difference or are they the same?

 

 

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let me Google that for you

 

https://en.wikipedia.org/wiki/Working_load_limit

[arbornaught]

let me Google that for you

 

 

 

https://en.wikipedia.org/wiki/Working_load_limit

 

 

Right that's of no help at all really, I'm here with a loler guy and he's certain that the swl will be lower than the wll. My argument is that they are the same. He's saying that the swl is a combination of environmental factors and the sf of the wll

 

 

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[waterbuoy]

I think he is correct.

 

For example, a single wire lifting strop may have a WLL of (say) 2 tonnes when used in line as a straight pull/lift. However, this is downrated when used as part of a 2-wire set-up to give a lower value for the SWL for each wire strop, although the total SWL may be higher as two strops are being used.

 

In essence, I think the WLL is the maximum load that a device can be rated for, whereas the SWL is that which is derived after taking into account specific factors which make the situation 'less than perfect'.

 

In practice they are often taken to be the same, as indicated by the wiki reference already quoted above.

[TIMON]

Right that's of no help at all really, I'm here with a loler guy and he's certain that the swl will be lower than the wll. My argument is that they are the same. He's saying that the swl is a combination of environmental factors and the sf of the wll

 

 

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The working load limit is the generic maximum load for the item of equipment.

 

The safe working load is task specific.

 

So it can be lower. Your LOLER guy is right.

 

 

 

 

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[arbornaught]

The working load limit is the generic maximum load for the item of equipment.

 

The safe working load is task specific.

 

So it can be lower. Your LOLER guy is right.

 

 

 

 

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I thought maximum load was mbs

 

 

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[Arctostaphylos uva-ursi]

WLL and SWL are abbreviated terms commonly used in the field of engineering. “WLL” stands for “working load limit” while “SWL” stands for “safe working load.” The main differences between safe working load from working load limit is that “SWL” is the older term. Today, SWL is not used anymore because it has been completely replaced by the term WLL. Let us discover the reasons why engineers put an end to using the term “safe working load.”

 

“Safe working load” is also synonymous with “normal working load.” According to irata.org, “safe working load” is defined as “the breaking load of a component divided by an appropriate factor of safety giving a safe load that could be lifted or carried.” Safe working load is the amount of weight (load) that a lifting device can carry without fear of breaking.

 

Now, who sets the load capacity for certain lifting equipment? It is the lifting equipment’s manufacturer. The manufacturer recommends the maximum load capacity of his lifting equipment. The lifting equipment or device can be a rope, a line, a crane, hooks, shackles, slings, or any lifting device. To know the safe working load, the lifting equipment’s minimum breaking strength is divided with the safety factor that is constant or assigned to a particular type of equipment. Usually, the safety factor of a particular equipment ranges from 4 to 6. If the equipment poses a risk to a person’s life, the safety factor is raised to 10.

 

Since the definition of “safe working load” is not very specific and there are legal implications, the USA standards began to stop using this term. A few years after the USA standards began to stop using this term, the European and ISO standards began to follow suit. Later on, both the Americans and Europeans developed a more appropriate term and definition for the maximum load capacity of a particular lifting device. Both parties agreed to the use of the term “working load limit” or WLL.

 

 

 

Based again on the pdf file presented in itera.org, the specific definition for the working load limit is that it is the maximum mass or force which a product is authorized to support in general service when the pull is applied in-line, unless noted otherwise, with respect to the centerline of the product. This definition can also be added to refer to the following definitions: the maximum load that an item can lift; and the maximum load that an item can lift in a particular configuration or application.

 

The working load limit of a lifting equipment depends greatly on a competent and skilled manufacturer who can wisely designate its WLL value. It’s the responsibility of the manufacturer to determine the right or approximate WLL value for each lifting device. To come up with a WLL value, there are many factors to consider. This includes the speed of operation, the applied load, the length of each rope or line, size, number, and etc. Any factor that can affect the working load limit of a lifting device should be carefully observed.

 

Summary:

 

WLL stands for working load limit while SWL stands for safe working load.

WLL and SWL are terms often used in the field of engineering.

Safe working load is the older term of working load limit.

The definition for safe working load is the breaking load of a component divided by an appropriate factor of safety giving a safe load that could be lifted or be carried.

The working load limit is that it is the maximum mass or force which a product is authorized to support in general service when the pull is applied in-line, unless noted otherwise, with respect to the centerline of the product.

[TIMON]

I thought maximum load was mbs

 

 

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MBS. Is minimum breaking strength.

 

It is the point above at which the item may fail.

 

 

 

 

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[kevinjohnsonmbe]

WLL and SWL are abbreviated terms commonly used in the field of engineering. “WLL” stands for “working load limit” while “SWL” stands for “safe working load.” The main differences between safe working load from working load limit is that “SWL” is the older term. Today, SWL is not used anymore because it has been completely replaced by the term WLL. Let us discover the reasons why engineers put an end to using the term “safe working load.”

 

 

 

“Safe working load” is also synonymous with “normal working load.” According to irata.org, “safe working load” is defined as “the breaking load of a component divided by an appropriate factor of safety giving a safe load that could be lifted or carried.” Safe working load is the amount of weight (load) that a lifting device can carry without fear of breaking.

 

 

 

Now, who sets the load capacity for certain lifting equipment? It is the lifting equipment’s manufacturer. The manufacturer recommends the maximum load capacity of his lifting equipment. The lifting equipment or device can be a rope, a line, a crane, hooks, shackles, slings, or any lifting device. To know the safe working load, the lifting equipment’s minimum breaking strength is divided with the safety factor that is constant or assigned to a particular type of equipment. Usually, the safety factor of a particular equipment ranges from 4 to 6. If the equipment poses a risk to a person’s life, the safety factor is raised to 10.

 

 

 

Since the definition of “safe working load” is not very specific and there are legal implications, the USA standards began to stop using this term. A few years after the USA standards began to stop using this term, the European and ISO standards began to follow suit. Later on, both the Americans and Europeans developed a more appropriate term and definition for the maximum load capacity of a particular lifting device. Both parties agreed to the use of the term “working load limit” or WLL.

 

 

 

 

 

 

 

Based again on the pdf file presented in itera.org, the specific definition for the working load limit is that it is the maximum mass or force which a product is authorized to support in general service when the pull is applied in-line, unless noted otherwise, with respect to the centerline of the product. This definition can also be added to refer to the following definitions: the maximum load that an item can lift; and the maximum load that an item can lift in a particular configuration or application.

 

 

 

The working load limit of a lifting equipment depends greatly on a competent and skilled manufacturer who can wisely designate its WLL value. It’s the responsibility of the manufacturer to determine the right or approximate WLL value for each lifting device. To come up with a WLL value, there are many factors to consider. This includes the speed of operation, the applied load, the length of each rope or line, size, number, and etc. Any factor that can affect the working load limit of a lifting device should be carefully observed.

 

 

 

Summary:

 

 

 

WLL stands for working load limit while SWL stands for safe working load.

 

WLL and SWL are terms often used in the field of engineering.

 

Safe working load is the older term of working load limit.

 

The definition for safe working load is the breaking load of a component divided by an appropriate factor of safety giving a safe load that could be lifted or be carried.

 

The working load limit is that it is the maximum mass or force which a product is authorized to support in general service when the pull is applied in-line, unless noted otherwise, with respect to the centerline of the product.

 

 

Great post!

 

Now, if only we could weigh them pesky lumps before we send 'em down the line 😄