Sling Length Calculators

IMPORTANT! PLEASE READ CAREFULLY

For your own safety and the safety of others, the completion of a certified Rigging Training course is highly recommended before attempting any rigging or utilizing the calculators on this page. If you have not yet completed a Rigging Training Course, please contact training@northernstrands.com or visit our Below the Hook Rigging Page.
Contact Northern Strands if you are in any way unsure of the condition of your sling or rigging equipment. For more information or to contact us about rigging and equipment inspections, please email sales@northernstrands.com or call (306) 242-7073.

2 Sling Bridle: Required sling length

This calculator is used when the distance between the only 2 rigging attachment points on the load, the amount of room available or desired between the load and lifting device, and the weight of the load are measurable/selected values.

Distance Between Pick Points:

Result - Length of Sling & Attachment Hardware:

Headroom top of load to bowl of hook:

Result - Horizontal Sling Angle: Do NOT use sling if angle is less than 30 degrees.

Load Weight:

Result - Sling Tension (in each sling):

3 Sling Bridle: Required sling length

This calculator is used when 3 slings will be attached to a load with 3 equally spaced attachment points that are all an equal distance from the centre of gravity and an ideal sling angle is selected.

Pick Point Spread:

Result - Vertical Share of Load on Each Sling:

Desired Angle:

Result - Length of Sling & Attachment Hardware:

Load:

Result - Headroom:

Result - Load Angle Multiplier:

Result - Minimum Capacity of Single Leg

4 Sling Bridle: Required sling length

This calculator is used where 4 slings will be attached to a load that has 4 attachment points that are equal distances from the load's Centre of Gravity. The distance between the attachment points that run along the load, the distance between the attachment points that run across the load, and the load weight must be known values, and a desired sling angle must be selected.

Spread Length:

Result - Vertical Share of Load Per Leg:

Spread Width:

Result - Length of Sling & Attachment Hardware:

Desired Angle:

Result - Headroom:

Load:

Result - Minimum Capacity of Single Leg

Result - Load Angle Multiplier:

2 Sling Bridle with symmetrical or asymmetrical Centre of Gravity (CoG)

Location of Centre of Gravity(CoG) and its distance from each pick point must be known. User must decide between placing adjustable rigging or a fixed length sling/hardware to the pick point nearest the Centre of Gravity. Rigging closest to the CoG will always bear the greatest share of the load weight.

Length of Fixed Sling and attachment hardware (SL2):

Result - Distance between pick points (D1 + D2):

Distance: Cog to furthest pick point (D2):

Result - Load angle multiplier (fixed sling):

Distance: Cog to closest pick point (D1):

Result - Included angle between slings:

Load:

Result - Horizontal sling angle (fixed sling):

Result - Adjustable Rigging: Required length (SL1):

Result - Headroom (H):

Result – Minimum Capacity of Fixed Rigging:

Result - Load angle multiplier (adjustable rigging):

Result – Minimum Capacity of Adjustable Rigging:

Result - Horizontal sling angle (adjustable rigging):

2 Sling Bridle with symmetrical or asymmetrical Centre of Gravity (CoG)

Location of Centre of Gravity(CoG) and its distance from each pick point must be known. User must decide between placing adjustable rigging or a fixed length sling/hardware to the pick point nearest the Centre of Gravity. Rigging closest to the CoG will always bear the greatest share of the load weight.

This calculator is for the case when fixed length sling is closest to CoG.

Length of Fixed Sling & attachment hardware (SL1):

Result - Distance between pick points (D1 + D2):

Distance: Cog to closest pick point (D1):

Result - Load angle multiplier (fixed sling):

Distance: Cog to furthest pick point (D2):

Result - Included angle between slings

Load:

Result - Horizontal sling angle (fixed sling):

Result - Adjustable Rigging: Required length (SL2):

Result - Headroom (H):

Result – Minimum Capacity of Fixed Rigging:

Result - Load angle multiplier (adjustable sling):

Result – Minimum Capacity of Adjustable Rigging:

Result - Horizontal sling angle (adjustable rigging):

The Northern Strands Sling Length Calculator has been designed to assist you in selecting slings with enough load carrying capacity for your lifting applications. It is your responsibility to assure that the slings you use are appropriate for your application.

Factors you must consider include:

Type of hitch/method of rigging
Effect of angle on capacity
chemically active environment
Protection from sharp edges
Temperature of load and lift environment
Condition of sling – passes all inspection criteria
The end fittings at the load will see the same force as the sling connected to it, and they must also be adequate for their intended use. Please consult Northern Strands order desk for capacities with the use of hardware, or the addition of a top Masterlink.
Optimal horizontal sling angle is 60 degrees. This is achieved by having a sling length equal to the distance between pick points.

By clicking, “Agree” you are acknowledging that the calculator provided is for general purpose use only and is only as accurate as the variables entered into it. You agree that your ultimate purchase and use of Northern Strands slings must be determined by you to be appropriate for your specific applications. Northern Strands makes no guarantees that the information provided in the calculator is correct.

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Sling Length Calculators

IMPORTANT! PLEASE READ CAREFULLY

2 Sling Bridle: Required sling length

3 Sling Bridle: Required sling length

4 Sling Bridle: Required sling length

2 Sling Bridle with symmetrical or asymmetrical Centre of Gravity (CoG)

2 Sling Bridle with symmetrical or asymmetrical Centre of Gravity (CoG)

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