Grade 80 vs Grade 100 performance, angle charts, and ASME B30. <br /> When one sling leg lifts 1,000 lbs. Our helpful spreadsheets will calculate the basic sling leg lengths and suggest some top-selling standard sling types and sizes to meet your capacity. Essential for rigging safety, load calculations, and industrial lifting operations. Jul 26, 2023 · Also, the chart shows the sling angle and how much the sling can lift from that angle. (2) Rated loads are for angles of choke greater than 120 degrees. Sling Angle Calculator: How to Use It Safely Check sling angles, load multipliers, and leg tension in minutes so every lift stays within safe limits. Conversely, as the sling angle increases, the tension in the sling legs decreases, resulting in a lower load on each leg of the sling – and that increases capacity. When rigging ropes the ‘ideal angle’ is approximately 45°, at the ideal angle there would be 54% of the loads weight being distributed to each anchor device. Aug 12, 2025 · Calculate sling angles and tension forces quickly with our free Sling Angle Calculator. Sling-To-Load Angle is always the angle between the sling leg and the horizontal surface. Mar 11, 2025 · The Rigging Angle Calculator is an essential tool for professionals involved in rigging and lifting heavy objects. This document provides specifications for flat polyester webbing slings in single, double, three, and four ply configurations. 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. At first glance these charts appear to be simple easy-to-read and follow guidelines for the maximum lifting capacity or working load limit (WLL) that a given alloy chain sling may have at a specific lifting angle. For example, a sling rated at 5,200 lbs in a basket hitch would have a 4,500 lb capacity at a 60 degree angle. Here are some examples: The methods of lifting for synthetic slings The The figures above reveal that as the sling angles decrease, the tension in the sling legs increases, resulting in a greater load on each leg of the sling – and that reduces lifting capacity. For angles not shown, use the next lower angle or have a qualified person calculate the rated load for the new angle. Oct 19, 2025 · Easily calculate the sling angle factor and load per sling leg with this free Sling Angle Factor Calculator. Understanding this geometric relationship is fundamental to calculating safe working loads. Slings should never be used at angles less than 30 degrees. Before using the calculator For accurate results and safe rigging, make sure you consider the following factors: load weight (tonnes) – consult your supervisor if unsure application requirements (single- or multi-leg, basket or choke hitch) additional Reeve Factors may apply (25% for round loads and up to 50% for square loads) on multi-leg slings a. About this free rigging calculator This free online rigging calculator helps you estimate sling angle, per‑leg line tension, and simple load sharing for common lifts. ASME B30. The rated capacity of the sling must be based on the smallest horizontal angle. What Are Wire Rope Slings? Wire rope slings are constructed from multiple strands of steel wire twisted together to form a strong, flexible lifting tool. The tension on each leg of the sling is increased as the angle of lift, from horizontal, decreases. The sling leg load of two vertical slings is one-half of the total load for each sling. This factor is crucial for calculating the actual tension in slings during lifting operations, ensuring safe working loads are not exceeded. Angle of loading is the inclination of a leg or branch of a sling measured from the horizontal or vertical plane as shown in Fig. It determines how the angle formed between the sling legs and the horizontal plane impacts the sling’s working load limit. All sling angles as mentioned in this catalogue are measured from the horizontal. When a sling is being used in a vertical position (a straight pull), a Working Load Limit (WLL) applies. Learn how to calculate the lifting capacity of slings at different angles of lift and choke. Use whole numbers Explore the load angle chart to understand the impact of angles on lifting capacities and ensure safe rigging practices. Works with both metric and imperial units. Sling Load and Length Calculator Calculating loads and lengths of slings is vital when specifying lifting gear. Headroom Is headroom restricted? Any slings that have 1 leg automatically default to "No" as the lifting angle is not taken in to consideration. Sling capacity decreases as the angle from horizontal decreases. Weight of Load (lbs) Number of Legs Supporting Load 90 8 This load chart is specifically for Pewag manufactured slings but it shows the load capacities for grade 8 and grade 10 Alloy steel chain slings which are the standard used for chain slings in general use. It is essential to understand how the maximum load is influenced by factors such as tool dimensions and lifting angles. Aug 4, 2021 · The configuration mode factors are a coefficient applied to the WLL of a sling to take into account the geometry of the sling (number and angles of legs) and the consequence of the bending of certain components. Work out the SWL of Chain Slings using the Load Chart. It helps determine the increased tension in a sling when the lifting angle is less than 90 degrees, ensuring safe and efficient lifting operations. 3. Common rigging charts show a theoretical load factor of about 1. Rated Capacities for Slings Use the following calculator to determine the rated capacity required by the sling(s). Example: Although looking at this chart is pretty straightforward, when looking at a basket hitch, you want to understand the working load limit for a true vertical basket hitch say for a 1/4” wire rope sling is 1. Type of hitches, body style, and leg angles will affect the Sling Rated Capacity. Jan 14, 2019 · Have you ever needed to determine the sling length for a desired angle of loading (horizontal sling angle), but perhaps struggled with how to get the correct answer? First, you will need to know four pieces of information: Location of center of gravity (COG) Desired sling angle. Perfect for riggers and engineers to ensure safe lifting and load distribution. This becomes even more important when the center of gravity (CoG or CG) is offset, as it changes the load in the slings, and the length of each sling. However, angles between 60° to 90° are generally considered safe. Only use slings with proper Rated Capacity for the work required. In general, the recommended best Jul 3, 2021 · The sling angle, or horizontal angle, is the angle where the sling meets the load. Oct 3, 2024 · The Sling Angle Factor Calculator is an essential tool for those in the lifting and rigging industries. Application of Slings for lifting considerations and sling lifting load calculations (bottom). A working load for slings changes subject to the application. | | | | Visit our NEW WEBSITE at: Decreased Capacity of sling Due to Effects of Sling Angles This document provides charts showing how sling angles affect lifting capacity. Shallower angles significantly The sling calculator will calculate the breaking strength of the chain, rope etc from which the sling leg is made and also the Working load limits of terminal fittings. 1. Multiply the sling leg’s share of the load by the tension multiplier to determine the increased sling leg tension. Click Here for More Information Sling Calculator Agreement The Lift-All® Sling/Leg Length Calculator has been designed to assist you in selecting the appropriate size slings for your lifting applications. As the angle decreases the stress imposed on the leg of a sling increases. 2. Find out how connection methods affect lifting angles. Home » Info & Services » Rigging & Lifting Warnings and Information » Load Angle Chart The examples below demonstrate how to calculate the Sling Load (SL) each Sling must carry based on their corresponding Sling angle and the Sling angle factor from the table before. Protecting the Sling and Load Sling Angle Factor Calculator Determine accurate sling angle factors, enhance lifting safety, and ensure compliance with rigging and material handling standards. This blog will provide a comprehensive lifting load chart for wire rope slings ranging from 8mm to 80mm, detailing the load capacities for different angles and hitch types. See examples of reduction factor, tension factor and minimum sling rating for different angles and loads. Understanding sling angles is crucial to select slings to carry any given load. For example, a smaller angle between the sling legs increases the tension on each leg, requiring slings with higher load capacities. It is most desirable for a sling to have a larger angle of lift, approaching 90°. 1) The sling angle affects the capacity of rigging, with shallower angles increasing tension. Safety Factors inc the angle of lift, temperatures, grading of steel chain, legs and more. It is important for ensuring the proper and safe use of slings in lifting operations. Reduction Factor [RF] x the sling's rated capacity for the type hitch that will be used = Sling's Reduced Rating. Feb 15, 2025 · The safest angle for a wire rope sling is 90 degrees (vertical lift), as it ensures maximum lifting capacity without additional stress on the sling. A simple demonstration makes this very clear. Safety Calculators Sling Angle Calculator Wind Forces Calculator Center of Gravity Calculator Volume Calculator Order a lift plan Calculate sling angles accurately with our user-friendly HTML and JavaScript sling angle calculator. It is your responsibility to ensure that the slings you use are appropriate for your application. For instance, try 45 or 30 degrees. Feb 6, 2013 · This chart illustrates how the stress in a sling<br /> increases as the angle increases (all angles are<br /> measured from the vertical). Oct 13, 2025 · Sling angle charts cross-reference sling length and vertical height to determine precise angles and load factors. To determine capacity at an angle, multiply the rated capacity by the angle factor in the charts. Do not exceed rated capacities. May 20, 2024 · Mode factors are the calculations used to determine the tension when lifting with two or more slings/chains at an angle greater than vertical. Lift-All recommends a Spread of 1/2 to 2/3 of the overall load length. Sling Load Chart As the sling-to-load angle decreases, so does the rated capacity of a sling. Learn about the stress imposed on a sling when it is used in different orientations. Use this chart for all type slings: rope, chain or synthetic web. Determine the sling angle from the horizontal and the corresponding tension multiplier (from the chart below). Learn how to calculate sling angles for safe lifting. Understanding the effect of angles on sling capacities is a critical part of safe rigging. You will need a sling or slings with a rated capacity equal to or greater than the rated capacity required for the corresponding rigging technique. When using hooks in a shortening (grab) or choker application, the Working Load Limit (WLL) of the sling must be reduced by 20%. This is achieved by having a sling length equal to the distance between pick points. Slings should have a minimum design factor appropriate to the type of material asspecified in the appropriate section. The sling angle sheet helps you determine the sling angle. Color coding indicates the load capacity, with wider slings and more plies capable of higher loads. This is why doggers and riggers must know what they are lifting and how it will be attached to the load. Protecting the Sling and Load Aug 25, 2025 · A sling angle calculator is an engineering and safety tool used to calculate the sling angle factor (SAF) when lifting loads with slings or chains. The calculations cover load factors, sling angles, and height and length ratios. 2) A 60 degree angle is a common benchmark, as it creates an equilateral triangle for easy reference. Imagine one carries a weight with one’s arm hanging down, and then try lifting the same weight sideways up and away […] Nov 2, 2024 · Use the Sling Angle Calculator to determine the sling angle for safe lifting. Protecting the Sling and Load This ensures stability in scenarios like “ using round slings in multi-leg bridle setups,” where narrower angles (per esempio. This angle also maximizes the load capacity of the sling, allowing for efficient and safe lifting operations. Jan 12, 2026 · A sling angle calculator is a tool used in lifting operations to determine the correct angle at which slings should be attached. Features that affect the rated capacity of the sling and that shall be considered in calculating the design factor are: 1. OR b. This blog will teach you to be prepared when lifting at an angle. How Does the Calculator Work? The calculator uses the load factor (1) The horizontal angle is the angle formed between the inclined leg and the horizontal plane [see figure 1 (d)]. KENNEDY WIRE ROPE AND SLINGS Dec 8, 2025 · Learn how sling angles affect alloy steel chain sling capacity. at 0 o , the sling<br /> stress is also 1,000 lbs. Definitions. Perfect for riggers, crane operators, and engineers. 3 tons. It provides a scientific method to calculate the optimal angle for slings used with cranes, hoists, and other lifting devices, ensuring that loads are balanced and secure during lifting. Accurate angle measurements can help avoid overload risks and ensure secure rigging for heavy loads. 4 at β = 0°–45° (included angle 0°–90°). Learn how to calculate sling angles and their effects on sling tension and capacity using a chart and formulas. Length factor (L/D) for the desired angle of Jul 24, 2019 · The Ideal Angle As the internal angle between the rigging slings increases then additional forces (vector forces) begin to be applied to each sling / anchor point. Enter height and reach to get precise lifting angles. Depending on the lifting criterion and method, the WLL of the sling will be increased or reduced. The capacity of round slings and choker hitches decreases as the angle from horizontal increases. What is the Lifting Sling Angle Calculator? The Lifting Sling Angle Calculator determines the load factor based on the sling angle. It lists the safe working load limits or weight load limits for each type of sling at various widths and lifting modes between 100-200%. If the sling angle increases<br /> to 45 o , the stress actually exerted on the sling<br /> Sling angles, sling capacities and more. Use it as a sling angle calculator or two‑leg bridle calculator to visualize how moving the hook or widening pick points changes tension. Factors you must consider include: You understand that the calculator Jan 12, 2021 · To gain a better overall idea of what a sling angle is and how to calculate it, read this detailed article, which provides an in-depth explanation. 9 now calls the horizontal sling angle the angle of loading. , 45 ° reduces to ~70%, 30 ° to ~50%) dramatically increase stress per leg—always reference a sling angle chart or consult a qualified synthetic sling supplier. For Endless, Two Legs, Three & Four Legs Chain Slings Important Notes: Determining the angle formed between a lifting sling and the horizontal is crucial for safe lifting operations. Measured from a common horizontal plane to the hoisting Aug 15, 2024 · Learn more about the importance of calculating sling angles and how to find the right slings for your lifting tasks. Calculate sling angles, load multipliers, and tension factors instantly with SlingCalc's free, browser-based sling angle calculator. Using the angle from horizontal, read across the Angle Chart to the corresponding number in the Reduction Factor column. RIGGERS-MATE is a free sling calculator and lifting guide app for iPhone, iPads and Android devices Calculate the working load limit/size of your wire rope or chain sling * (includes full support for Nobles Grade 100 offering NOBLE10™) Find the dimensions and included angle of your 2 or 4 leg sling Estimate the weight of your load by material Weight of Load (kgs) Number of Legs Calculate Minimum Sling Capacity (kgs) RIGGERS-MATE is a free sling calculator and lifting guide app for iPhone, iPads and Android devices Calculate the working load limit/size of your wire rope or chain sling * (includes full support for Nobles Grade 100 offering NOBLE10™) Find the dimensions and included angle of your 2 or 4 leg sling Estimate the weight of your load by material Aug 4, 2021 · The configuration mode factors are a coefficient applied to the WLL of a sling to take into account the geometry of the sling (number and angles of legs) and the consequence of the bending of certain components. Mar 20, 2025 · A sling angle of 65 degrees ensures that the load is evenly distributed across the sling legs, reducing the risk of slippage or failure. 9 compliance explained. Each sling is tested and Jul 26, 2023 · Do you use wire rope slings to lift and move material through your facility? Learn more about wire rope hitch types, sling angles, bridle angles, sling eye design and more Nov 6, 2023 · The Leg Sling Angle Adjustment Calculator calculate the adjusted load when lifting objects with slings at an angle to the vertical axis. . Mar 24, 2021 · One method uses a sling angle factor chart, the other method the ratio of the length of the sling divided by the height. A sling angle is a measure of the angle between the centerline of a sling and the length of either side of the sling. 0). The second part of the calculator allows the calculation of either included angles or sling leg lengths for a particular sling configuration. Download PDF files with charts and formulas for round slings, choker hitches and nylon webbing slings. Do not use angles less than 30 degrees! Site Content MULTIPLE SLING CALCULATOR Calculates sling loads with 2 or more slings, at different angles for a given weight. You need to measure that to find out how you properly choose the piece of rigging you need for the applied force that’s going to be on them. |Understanding the effect of angles on sling capacities is a critical part of safe rigging. 3) To calculate sling capacity at a given angle, use the chart to find the reduction factor corresponding to the angle, and multiply it by the sling's rated capacity. Angle-rated double-leg rigging – use within tagged limits – The rated working load for this two-leg sling is based on a leg angle (β) of 45°–60° from the vertical (included angle 90°–120°, load factor 1. Calculate sling angles accurately with our user-friendly HTML and JavaScript sling angle calculator. Ideal for rigging, crane work, and planning asymmetrical lifts. Do not use angles less than 30 degrees! The sling calculator will calculate the breaking strength of the chain, rope etc from which the sling leg is made and also the Working load limits of terminal fittings. Optimal horizontal sling angle is 60 degrees. Calculating your chain sling correctly. The This ensures stability in scenarios like “ using round slings in multi-leg bridle setups,” where narrower angles (ví dụ. Lifting load calculator for precise sling forces, angles, and center of gravity. NOTE: If the calculated Head Room is greater than the available Head Room, try typing in a slightly smaller angle for Known Angle A. N-184-5; provided that an angle of loading of five degrees or less from the vertical may be considered a vertical angle of loading. By viewing this page you are acknowledging that the calculator provided is for general purpose use only and is only as accurate as the variables entered into it. NOTE: If the calculated Head Room is greater than the available Head Room, try typing in a smaller angle for Known Angle A. This ensures stability in scenarios like “ using round slings in multi-leg bridle setups,” where narrower angles (per esempio. These charts provide immediate access to critical reduction and tension factors without requiring complex trigonometric calculations in the field. Rigging 101: Hand Signals, Load Charts & Sling Angles Learn the basics of rigging with this beginner-friendly guide covering standard hand signals, how to read load charts, and why sling angles matter for safe and efficient lifting operations. Divide sling height* [H] by sling length* [L].

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