What are flat webbing slings and how are they rated?
Flat webbing slings are textile lifting slings made from woven polyester, and they are manufactured and tested to EN 1492-1 for general lifting operations. Because each sling is colour-coded to its Working Load Limit (WLL), operators can identify capacity at a glance — for example, violet is 1 t, green is 2 t and yellow is 3 t. In addition, every sling carries a durable label stating the WLL, standard, material, length and a unique serial number for traceability. Moreover, EN 1492-1 slings are built with a 7:1 safety factor, which means the minimum breaking force is at least seven times the rated WLL. Therefore, the correct sling depends on load weight, the hitch used and the working conditions.
Webbing sling colour codes and capacity
Because colour indicates capacity, the table below shows the standard WLL for a straight vertical lift. However, always confirm the WLL on the sling label, and apply the correct mode factor for choke or basket hitches.
Colour
WLL (vertical)
Capacity stripes
Violet
1 t
1
Green
2 t
2
Yellow
3 t
3
Grey
4 t
4
Red
5 t
5
Brown
6 t
6
Blue
8 t
8
Orange
10 t
10
WLL values are for a straight lift; always confirm on the label per EN 1492-1.
Webbing slings — frequently asked questions
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What do the colours on a webbing sling mean? Each colour indicates the Working Load Limit under EN 1492-1. For example, violet is 1 t, green is 2 t and yellow is 3 t, so operators can identify capacity quickly.
What is the safety factor of a webbing sling? EN 1492-1 slings use a 7:1 safety factor, which means the minimum breaking force is at least seven times the rated WLL. Therefore, they provide a large safety margin in normal use.
What is an eye-to-eye webbing sling? An eye-to-eye sling has a reinforced soft eye at each end. Because the eyes resist abrasion at the hook or anchor point, they extend the working life of the sling.
How does the hitch affect capacity? The vertical WLL changes with the hitch. For example, a choke hitch reduces capacity, whereas a basket hitch can increase it, so always apply the correct mode factor.