Herc How-To: assemble a chain sling
Chain is often used to tie down loads, for lifting applications and to tow loads – however, the rigging industry’s safety standards have developed in recent years, and chain used for lifting must meet certain specifications. Read on for our tips on how to assemble a chain sling.
Chain slings are among some of the most popular options for to lift a load – they’re often used to lift spreader beams, for example. Chain slings are durable, ductile, can resist high temperatures, rips & tears and in certain applications, are adjustable – but how do you determine the best chain sling for your project needs?
Herc How-To: two kinds of chain assembly
Two types of chain slings are used to for rigging and lifting applications – mechanical assembly and welded assembly. Chain slings are made with a minimum safety or design factor of 4:1.
The most common chain slings used in rigging and lifting are mechanically assembled since they’re quick to produce and it can be done with basic tools. Chain slings are made by a variety of manufacturers and in many different configurations.
Herc How-To: mechanically assembled chain sling hardware
Construct a basic mechanically assembled chain sling with this hardware:
- Master Link
- Mechanical Jointing Device
- Shortening Clutch (if required)
- Hook (other fitting as required)
Herc How-To: welded assembly
Welded slings are less commonly used. They take more time to manufacture, since once they’re made they undergo a heat treatment so they’re safe to use in a lifting application. This takes days, versus the minutes it takes to together a mechanically assembled chain sling.
Construct a welded assembly chain sling with this hardware:
- Master Link
- Welded Intermediate Link
- Welded Connecting Link
- Hook (other fittings if required) ** not pictured
Herc How-To: assemble a chain sling with correct chain grades
The marking grade for chains is recognized by numbers which are found on the chain link. Chain grades for chain sling assembly start at Grade 80 – Grade 80, 100 and 120 are used for lifting applications. However, do not use chain grade marks to determine overhead lifting applications. Do not use grade 30, 40 or 70 chains for overhead lifting.
These grades are used for lifting as they’re ductile and can cope with “shock-loading” that can happen while rigging.
Herc How-To: find the right assembly for you
Follow these steps to assemble the best chain sling for your lifting needs.
- Determine the weight of the load to lift, it’s working load limit and any angles that will affect the lift – read our blog on how to calculate load weight for detailed steps.
- Head to the dimension/specification chart provided by the chain sling’s manufacturer. Find the chain sling configuration* that will suit your load and lift.
- Head to the assembly chart found in the catalogue or website of your respective distributer. Find the Working Load Limit (WLL) to lift at the top of the chart. Find the column that represents size/length, which will be donated in centimetres, inches or millimetres. Be sure to size up. Example: if your load’s WLL is 3,000lbs the chart may give you two options – a WLL of 2,650 and 4,500. Choose the chain length that corresponds with the WLL of 4,500lbs – it’s better to have too much capacity than not enough.
- Use the same instructions from Step 3 to choose hardware/fittings from the respective specification chart(s). Example: You’ve chose the DOG sling configuration – this means you must find an oblong shaped masterlink and a grab hook that corresponds to the WLL.
For example: Jim is planning to lift a load with a WLL of 3,000lbs and wants to assemble a chain sling.
Step 1) Jim finds the WLL column of his retailer.
Step 2) Find the WLL – since 3,000lbs isn’t on the chart, we choose the next one up which has a WLL of 4,500lbs.
Step 3) Jim needs chain with 1.79in. length.
* Chain Sling Configurations
Configurations are denoted by an acronym – the first letter represents the number of sling legs, the second letter represents the fitting at the top of the sling and the third letter represents the bottom fitting. Example: the “O” in DOG represents an “oblong shaped master link”.
|CO||Single chain sling with masterlink|
|SOS||Single chain sling with masterlink and sling hook|
|SOG||Single chain sling with masterlink and grab hook|
|SOF||Single chain sling with masterlink and foundry hook|
|SSS||Single chain sling with sling hook each end|
|SGS||Single chain sling with grab hook and sling hook|
|ASOS||Adjustable single chain with masterlink and sling hook|
|ASOF||Adjustable single chain with masterlink and foundry hook|
|ASOG||Adjustable single chain with masterlink and grab hook|
|SOCH||Single chain sling with sliding choker|
|SOSL||Single chain sling with with self locking hooks|
|DOS||Double chain sling with masterlink and sling hook|
|DOG||Double chain sling with masterlink and grab hook|
|DOF||Double chain sling with masterlink and foundry hook|
|ADOS||Adjustable double chain sling with masterlink and sling hook|
|ADOG||Adjustable double chain sling with masterlink and grab hook|
|DOCH||Double chain sling with masterlink and sliding choker|
|DOSL||Double chain sling with with self locking hooks|
|ADOSL||Adjustable double chain sling with with self-locking hooks|
|TOS||Triple chain sling with masterlink and sling hook|
|TOG||Triple chain sling with masterlink and grab hook|
|TOF||Triple chain sling with masterlink and foundry hook|
|TOSL||Triple chain sling with with self locking hooks|
|QOS||Quadruple chain sling with masterlink and sling hook|
|QOG||Quadruple chain sling with masterlink and grab hook|
|QOF||Quadruple chain sling with masterlink and foundry hook|
|QOSL||Quadruple chain sling with self-locking hooks|
Hercules SLR – Custom Chain Sling Assembly, Inspections, Repairs and more
We make custom slings to fit your needs, no matter the application. Damage found on chain slings can be inspected, repaired or replaced if needed – e-mail us at [email protected] to purchase a chain sling, find out more about how to assemble a chain sling or to have a chain sling repaired or inspected.