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Can I Join Two Flat Slings Together to Extend the Length?

A flat sling that is just a few feet too short can bring a lifting operation to a halt. The immediate thought: why not just join two slings together? The practice of connecting slings is common, but according to OSHA 1910.184(c)(2) and ASME B30.9, slings shall not be shortened or lengthened by knotting or twisting, nor joined by knotting .

The Physics of Flat Slings: How Wide Surfaces Reduce Pressure and Protect Loads

A flat sling does more than just lift a load—it protects it. The wide, flat webbing surface distributes the load's weight over a larger area, significantly reducing the pressure at any single point. This is the fundamental physics principle behind flat slings: Pressure = Force ÷ Area. By increasing the contact area, flat slings minimize the risk of surface damage, dents, and crushing—making them the preferred choice for lifting delicate, finished, or easily damaged materials. This guide explains the physics of pressure distribution, compares flat slings to other lifting solutions, and provides practical guidance for selecting the right sling width for your application.

What Is the 1/10 Rule for Retiring a Flat Sling?

The 1/10 rule is a straightforward but critical retirement criterion for flat slings: when abrasive wear reduces the webbing width by 1/10 or more, the sling must be removed from service. This rule is specified in EN 1492-1 and recognized by ASME B30.9 as a key indicator of excessive wear. This guide explains what the 1/10 rule means, how to measure webbing width accurately, why this threshold was chosen, and how to apply it in daily inspections. For rigging supervisors and safety professionals, understanding this simple rule can prevent the use of dangerously worn slings.

How Does Sling Angle Affect The Capacity of A Flat Sling?

A flat sling rated for 2 tons in a straight vertical lift may only be capable of safely lifting 1 ton when used at a 60° angle. This is because sling angle directly affects the tension in each leg of the sling—the smaller the angle between the sling and the horizontal, the greater the tension. According to EN 1492-1 and ASME B30.9, capacity must be reduced when slings are used at an angle or in multi-leg configurations. This guide explains the physics behind angle factors, provides capacity tables for flat slings, and offers practical guidance for calculating safe working loads in real-world rigging operations.

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Can I Join Two Flat Slings Together to Extend the Length?

The Physics of Flat Slings: How Wide Surfaces Reduce Pressure and Protect Loads

What Is the 1/10 Rule for Retiring a Flat Sling?

How Does Sling Angle Affect The Capacity of A Flat Sling?

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