2 sling capacity calculator File Version: 1. Because the angle of pull on the leg of a sling varies with the leg angle, forces may be exerted on a sling greater than the user may expect. 75 Distance. Figure 6-17. This angle causes an increase in the overall tension, which is why it can have a very large and impactful effect on the capacity of Assuming I understand your configuration correctly, you are partially correct and partially incorrect. Reach 3 Leg Sling Calculation : Lifting and moving heavy loads is a common task in various industries, such as construction, manufacturing, and logistics. Shank, Swivel, & Eye Hook. Vertical Choker Basket Approx. Learn how to calculate sling capacity and angle factor with this guide. For a wire rope with a diameter of 10 mm: This type of sling is sometimes called a flat eye-and-eye, eye-and-eye, or double-eye sling. two legs at a included angle 90 0. 1 0. Thicker wire ropes have higher SWLs. 49: Web Slings & Roundslings - WSTDA. height from load to hook. 0. Marine Catalogue; Working Load Limits; If you are looking for more details, kindly visit Sling Capacity Calculation Formula, Best Electric Pallet Jack, Flat Webbing Sling. For example, a 10mm wire rope sling has a vertical SWL of 800 kg. Common Sling Configurations. One should always do a quick sling angle calculation to assure you are sizing the slings and rigging gear within rated capacity. Weight of Load (kgs) Number of Legs . 0 / 2000. All diameter dimensions in inches. This is the case for both Find a Distributor Sling Calculator Search Distributor Login. All Comments (0) Previous: Choosing the Right Chain Pulley Block for Your Needs. 7 1. The use of synthetic web slings in radiation areas should be avoided if possible. 8 1. ) Diameter of Bow Carbon Maximum Working Load (Tons) Code Alloy Maximum 6. Refer Table 2 & 10 IS 2762 : 1982 Specification for wire rope slings and sling legs ( First revision) The above Indian Standard – specifies dimensions, constructions loading, tests for two, three and four leg slings for use with wire ropes of nominal diameter ranging from 8 mm to 44 mm. These calculations are essential to avoid accidents, injuries, and damage to materials during the The attached spread sheets will calculate the basic sling leg lengths and suggest some top-selling standard sling types and sizes to meet your capacity. Wire rope slings are available in a range of sizes and assemblies, select the slings to be used and plan the lift taking the following into account: • Type of sling to be used - endless, single, two, three or four leg. The horizontal sling angle is 50°, the slings legs have equal length, and the center of gravity is in the center of the load (if not, see Centre of Gravity). Key points include: 1. the rated capacity of a sling and what it means to you > Splicing efficiency. Weight being lifted is symmetrically loaded; 2. This working load limit calculator (WLL) is a specialized designed to help find the maximum safe load that can be applied to a piece of lifting or rigging equipment. Eyehook Design Factor: 5/1 (Except alloy 30 ton and larger are 4-1/2 to 1) Shank and Swivel Design Factor: 4-1/2 to 1. Suggested Sling Sizes and Types: Synthetic Slings: Webbing Slings: 1 Ply: 2 Ply: Endless: Tuff-Edge Wire Rope: Grade 80 Chain: Grade 100 Chain: IMPORTANT NOTE: Length calculations include any in-line Assume your two slings have a capacity of 5,000 – pounds each and your load is 10,000 pounds. So the effective load is somewhere between the rated load and 2x the rated load, depending on how Wire Rope Bridle Slings, 2, 3, & 4 Leg, Wire Rope Sling, Lift-All, Lifting Slings, 2-Leg Bridle Sling, Prices include Thimbled Eyes and Eye Hooks, REDUCED CAPACITY Calculate rating of each sling rigged at this angle. Rated Capacity - of multi-leg sling/lifting accessory arrangements using Uniform Load Preferred For Use In Rugged Conditions. unionrope. Enter the chain sling length, if known. |Understanding the effect of angles on sling capacities is a critical part of safe rigging. Dividing the load weight by two (2) determines the vertical force applied to each sling. The spreadsheet is not require time factors. Lift-All lifting chain slings are available in grade 100 chain for 7/32″ through 3/4″, and grade 80 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. When the exact information about weight, lifting angle and position of the centre of gravity is known, you can calculate the working load limit using the trigonometric method as follows: 2-leg sling: W LL (ton) = 2 x WLL for single leg sling x cos β . 6 1. 5 ft. by 1. These figures represent the efficiency of the attachment. Straight Lift: Utilizes the full capacity of the sling. 8te is the maximum the slinger can lift using 2te slings at an angle no greater than 90° at the master link. Solution to find required sling capacity (or WLL): The chart should only be used as a guide. Useful when you do not know the actual sling angle. All capacities in tons of 2000 lbs. 62: 0: 30. Inspect Slings Regularly: Sling wear and damage can weaken lifting capacity. > Number of parts of rope in the sling. Hence, looking up the wire rope capacity of 5. Various types of slings have distinct capacities, with four standard options: wire rope slings, chain slings, synthetic web slings, and round slings. It uses various inputs 4 Leg Hitch Calculator Feet Inches Meters. Calculating Sling Capacity: To calculate sling capacity, use the formula SWL (kg) = D2(mm) x 8, where D is the diameter of the wire rope in millimeters. Thus, using a sling angle of θ=60°, the sling has 1. 33 x 4,000 = 5,320 lbs. How to Fill a Lifting Plan for a Crane. The load is supported by two slings of equal configuration with no internal angle, so 100kg / 2 = 50kg. Only use slings with proper Rated Capacity for the work required. ) Calculator Usage: This calculator is provided for general purpose use only. 9 and good engineering practice. How to Calculate Safe Man-Hours Worked at Worksite. Simple demonstration of the "rigger's method" for calculating the sling tension in a single leg of a multiple leg sling. This blog will Working load limits are based upon equally loaded and disposed sling legs. Mechanically spliced, single-part slings 25 times rope diameter Hand-spliced, single-part slings 15 times rope diameter Braided multi-part slings of 3 parts 10 times component rope diameter SLING TENSION. Wire Rope Slings. Understanding the SWL calculation formula is vital for maintaining safety standards and optimizing operations across industries. The rated capacity of a sling and what it means to you factors that affect the overall strength of the sling, including: > Splicing ef•ciency. Easily Calculate SWL of Wire Sling - - Free download as PDF File (. If the diameter is 10" and the diameter of the rope is 1/2, the D/d Ratio is 20. How to Use 1. (1000/2) x (10/8) = Single sling load in an angle Two-Leg Bridle Calculations to be made will include the capacity, slings, grabs, shackles, hooks, magnets, vacuum pads etc. Be sure to consider the sling The Leg Sling Angle Adjustment Calculator is a powerful tool used to calculate the adjusted load when lifting objects with slings at an angle to the vertical axis. Nominal leg length (m). Sling made with both loop eyes formed as in Type III, except that the loop eyes are turned to form a loop eye which is at a right angle to the plane of the sling body. 8. One method uses a sling angle factor chart, the other, the ratio of the length of the sling divided by the height. 1 to obtain SWL of . 57 x 14,200 lbs. Scan QR Code to Install. using the diagram below as a reference to their locations, and click the 'Calculate' button. Formula: H2 1,2 + 0,004 vh 1,6 H3 1,3 + 0,007 vh 1,9 H4 1,4 + 0,009 vh 2,2 Lifting equipment Lifting load coefficient f Tower crane and fixed crane 1,2 * Mobile crane 1,4 * Lifting and transporting on flat ground 2 - 2,5 Lifting and transporting on uneven terrain 3 - 4 4 In the precast factory: for de-mould f = 1. Weight of load. Each sling has a tag sewn to it with the type, size and rated capacities (8). Capacity Charts. The same double sling used at 35º would have a maximum working load limit of 57% of 14,200 lbs. 1 please use the link below and 1. Sub total Crane hook 2 leg Slings 1 Check Sling Load Capacity: Verify that the sling’s rated capacity is sufficient for the calculated tension, factoring in the sling angle. 732 times the force in the sling using a sling angle of θ=60°. Fabrication Efficiency - The ratio of Global Aviation Products Australia - Agents for Sling Light Sport Aircraft 2 Heavy lifting slings 2. 816. It will have the greatest share of the load. Multiply the rated capacity for the basket hitch as indicated on the sling tag by the reduction factor. Working Load Limit (WLL) 3 Leg Sling Calculation. Total load is 1,000 lbs. 2) Determine the Share of the Load (SOL) for the individual sling legs: Divide the load weight by the number of sling legs. 5 How to determine if a 20,000 lbs How to determine if a 20,000 lbs. Calculate the Sling to Load Angle (see below — Sling To Load Angle). It's vital to maintain an angle that safely distributes the load. Contact Us. Pick Point Spread LL: Feet: Inches Inches: Total Inches: Meters: Sling Leg Length SL: Head Room HR: Single Leg Minimum Vertical Capacity: NOTE: If the calculated Head Room is greater than the Do not use angles less than 30 degrees! Suggested Sling Sizes and Types: Synthetic Slings: Webbing Slings: 1 Ply: 2 Ply: additional Reeve Factors may apply (25% for round loads and up to 50% for square loads) on multi-leg slings; headroom; frequency of use and expected sling life; type of load and surface finish; sling length and slinging methods; environmental factors (corrosion, heat, sharp edges). 3. If the below calculator does not appear, or the version number is not In essence, 2 leg sling calculations are a set of calculations used to determine the capacity of a sling to lift a load safely. Grade 10- Chain Sling Load Capacities Factor of Safety Single Leg Chains 2 Leg Chains 3 & 4 Leg Chains Endless Chains Basket Chains 4 Working Angles - - 0-45 Deg 45-60 Deg 0-45 Deg 45-60 Deg 0-45 Deg 45-60 Deg - 0-45 Deg 0-45 Deg Load Factor 1 0. How to Calculate SWL of Wire Rope Sling. and your lifting setup involves two sling legs each at a 45° angle, then 1,000 / 2 x 1. 65 0. uk 4 2. Sling Capacity Calculator. Please Note: Tension calculations are based upon: Sling Web Sling Capacity Calculation. Thus, in drawing three (sling angle at 60°): 1000+2=500 (Load Per Leg if a vertical lift) 500 x 1. Calculates sling loads with 2 or more slings, at different angles for a given weight. 7. pdf) or read online for free. Volume is the quantification of the three-dimensional space a substance occupies. = 8,094 lbs. Pick Point Spread L: Sling Spread W: TOTAL LOAD WEIGHT: Pounds: Kilograms: Known Sling Leg Length SL: Head Room HR: Single Leg Minimum Vertical Capacity: <<MOST SLINGS: Single Leg Minimum Vertical Capacity: <<CHAIN SLINGS: NOTE: If the calculated Head Room is greater than the available Head Room Rated Capacity Tables) are used, the rated capacity of the sling must be decreased. LAF x SOL = Tension. Sling Configuration: The web sling will be attached to the steel beam using a basket hitch configuration. Understanding these factors is crucial for determining the safe working load of a basket hitch. We check the capacity of a Spreader Beam SB-170 that supports up to 170 tons and check that it reaches that capacity at 20m but only at 20º. 2) A 60 degree angle is a common benchmark, as it creates an equilateral triangle for easy reference. illegal, and can irreparably damage the sling and equipment. 52 tons from the previous table we must use 7/8" diameter 6-strand IWRC wire rope slings. Use the following calculator to determine the rated capacity required by the sling(s). Need a New Nylon Sling? Browse Hoist Central’s inventory . Our working load limit for this sling is 9600 lbs x . 154 load factor (from table) = 577 lbs. It takes into account the actual weight of the load and the angle (θ), providing a precise adjusted load that considers the sling's angle. It helps determine the increased tension in a sling when the lifting angle is less than 90 degrees, ensuring safe and efficient lifting operations. On every sling, the tag shows the WLL for different configurations: basket, choke, or vertical. per sling leg. Proceed as follows to calculate this load—and determine the rated capacity required of the sling, or slings, needed for a to compute the ACTUAL LOAD on each leg for this lift and angle. Example 1: This handbook provides comprehensive information on wire ropes, slings, and wire rope assemblies. Other factors, such as the hitch type, the condition of the sling, WELCOME TO THE DUTEST SLING LENGTH CALCULATOR The attached spread sheets will calculate the basic sling leg lengths and suggest some top-selling standard sling types and sizes to meet your capacity. 7 0. 2 sling legs. Understanding the effect of angles on sling capacities is a critical part of safe rigging. This simple yet essential calculation helps ensure the safe lifting and transportation of heavy objects in numerous fields. Comments. HOME; PRODUCTS. Calculate. 0 0. 92 0. Please input the weight of the load to be lifted with the sling, then press next. >Diameter around which the body of MULTIPLE SLING CALCULATOR. com Calculation Formula. Submitted By: Roland Cranford (sonicboomman2008) Submitted On: 03 Aug 2014. Webbing Slings and Round Slings. L= Length of the bridle leg 3. It is your responsibility to assure that the slings you use are appropriate for your application. The calculator is based on an iterative algorithm where the parable shaped cable is adapted to span L, height h 1 and h 2 according the figure above. 732 times the By this calculation, 2. 74: 30: 60. Random testing: In addition to using the above factors for calculating each sling’s rated capacity, we test randomly selected slings from production runs to make sure every new sling meets or exceeds speci˚cations and the rated capacity. 25 Share of Load Demonstrates how the cosine function can be used for calculating sling tension. The angle between the sling legs and the horizontal directly impacts the tension on each leg, influencing the required sling capacity. 2 Sling Tension 49,500 lbs. Loading Angle: Sling to load angle can be described as the angle between the sling leg and the horizontal surface. Tweet Share Share Email Sling Included Angle. -Determination of bridle hitch sling capacity. sizes to meet your capacity. Sling capacity isn’t solely dependent on the sling itself. Maximum included angle: 120° Hooks – Quenched & Tempered. capacity sling can safely lift a load at a specific angle using material that weighs 6,000lbs: Important: Remember that the capacity of a sling depends on the type of hitch being used: Choker hitch of a typical 20000lbs rated sling is 9200 lbs. Sling Calculators Dividing Capacity by Sling Legs. shackles, turnbuckles) connecting the sling to the load will be included in the sling length. 20 & BTH-1 Design Category B Service Class 2Proof-Tested to 125% capacity. NEXT . Products. 12 0. 2. WEB SLINGS AND LIFTING STROPS: ROUND SLINGS: ONE To determine the strength, the calculation m = F / g is used, where: m = mass in Using this equation for the 3/8” wire rope, you would calculate the strength as: m = (10. ) RULE OF THUMB, IF IN DOUBT – DON’T!! Applied Load Changes With Sling Angle DME swiveling hoist rings are designed and rated to be pulled at any angle at the rated load. It is better to use a larger shackle or a Wide Body shackle type. 3 2″ x 4″ 1. 414 = 707 lbs. • Calculations to be made will include the capacity, both of the overall beam and of the loading of the individual lifting points. This article will explain the formula used by the calculator, how to use it, provide an example, address common questions, and conclude with the importance of understanding a wire rope’s SWL. internal searches in the Engineering ToolBox Our Mission The Engineering ToolBox provides a The document provides design parameters and component force calculations for a padeye used to lift an object at a 60 degree angle with an 11. For instance, try 45 or 30 degrees. actual load per leg. With a sling angle of 30°, the force in the sling is 50/28. 1. > Type of hitch (straight pull, choker The calculations assume steady, capacity that is less than the actual test . Popular internal searches in the Engineering ToolBox Our Mission The Engineering ToolBox provides a wide range of free tools, calculators, and information resources aimed at engineers and designers. The sling and shackle are selected to have sufficient minimum breaking load capacity to safely lift the design load of 8417 kN, with safety factors applied according to standards. 2 Inspection & (re-)certification – Super-loop capacity up to 128 mm • Closer for cable-laid rope and sling fabrication up to 18” • Testbeds from 800 to 12,500 kN; pull & push If you are performing calculations involving the load of bridles and basket hitches, it’s important to use a wire rope sling capacity chart and also remember that as a reduction in the horizontal angle of the sling occurs the load imposed upon each leg increases. Sling capacity, the maximum load a sling can safely handle, is intrinsically linked to sling angle calculations. Use whole Our helpful spreadsheets will calculate the basic sling leg lengths and suggest some top-selling standard sling types and sizes to meet your capacity. Proceed as follows to calculate this load—and determine the rated capacity required of the sling, or slings, needed for a lift: The actual load must not exceed the rated sling capacity. It includes rated capacity tables for different sling designs made from extra improved plow steel or stainless steel wire This document provides a checklist and calculation form for mobile crane lifts up to 10 How To Calculate Crane Percentage Capacity. This blog will teach you to be prepared when lifting at an angle. Multiply 500 lbs. 48 1. Lifting Slings. About. Visit CANZ Homepage. 1. sar have carried out calculations for their customers to predict the service life of wire ropes. If you do not know what length is required, please enter the distance between the lifting points, using the diagram below as a reference to their locations and click the ‘calculate’ button. When the exact information about weight, lifting angle and position of the centre of gravity is known, you can calculate the working load limit using the trigonometric method as follows: 2-leg sling WLL (ton) = 2 x WLL for single leg sling x cos β. However, the applied load on a multipoint lift will increase if the sling angle is less than 90°. 154=577 lbs. Minimum Sling Capacity (kgs) 291294434 Lifting Calculation - Free download as Excel Spreadsheet (. Factors affecting capacities. xlsx), PDF File (. Web Sling Size and Capacity with Chart. 1 for pitch and transport f = 1. How does the sling angle affect the tension in the sling? The tension in the sling increases as the sling angle decreases. Download Catalog. Wire Rope Slings - ASME B30. Angle of Use: The web sling will be used at an angle of 60 degrees from the vertical. Understanding the difference between Safe Working Load (SWL) and rated capacity is vital: Safe Working Load (SWL): The maximum load a sling can safely handle under normal working conditions. 7-1 standards. Ricker [2]) IPSS: 2-02-001-18 Page 4 of 13 Note 6 - In soaker cranes, X/Y indicates the following: X – Gripping capacity of the tongs and Y – Hoist capacity of the tongs or auxiliary hook with slings. Calculate SWL of Wire Sling - How do you calculate wire rope sling capacity? To calculate the SWL of a sling needed to lift a load, divide the load by the angle factor and divide by the reeve factor. If maths isn’t A vital core component of any chain sling. If the weight of a body is W - the load in each wire is. Available in sizes ranging from 1/2" (13mm) to 2-3/8” (60mm) in diameter for both welded and mechanical slings. divided by two legs – 500 lbs. 81 m/s 2), which equals 1111 kg. txt) or read online for free. use the various types of ropes, slings, chains and accessories • calculate the safe working load (SWL) of any rope, sling, or chain to be used for lifting • assess the weight of loads to be lifted • select and use appropriate safe slinging techniques • safely sling loads of different weights and sizes • EXAMPLES OF HOW TO CALCULATE SLING LEG LOADS 1. Sling Capacity. Nominal Size (in. This type of sling is commonly referred to as a twisted-eye sling. 9 Different angles reduce the sling’s capacity due to increased stress. They have maximum abrasion and corrosion resistance. 2 Single laid slings 2. 73 for the angle and 0. Result – Minimum Capacity of Adjustable Rigging: Result - Horizontal Sling Angle (Adjustable Rigging): CALCULATE. 6 X 36 XIP® & 6 X 19 XIP The Complete Guide to Wire Rope Sling Load Capacity Chart (8mm to 80mm) When it comes to heavy lifting in industrial settings, wire rope slings are an indispensable tool. Thus, in the above drawing (sling angle at 60°): 1000 ÷ 2 = 500 Single Leg Slings (Capacity – Tons) Multiple Leg Slings (Capacity – Tons) Rope Dia. Double Leg Slings: • A double leg sling consists of two legs A 5 ton load has to be lifted with 2 slings. Endurance of Material: Construction of the sling, their material and strength are factors affecting workload limit (WLL). Always prioritise safety by CORE – Aggregating the world’s open access research papers Concept Cables Limited is an independent insulated wire and cable manufacturer providing cabling solutions for a whole spectrum of industries across the UK, Europe and worldwide. Calculation Reference. At any time that your hoists are going to be lifting at or near their maximum capacity you should have an engineer check your calculations. Leg Proportional Share of the Load x Load Factor Sling Tension x 9 12 =. 1 1. Sling 1 = 10,000 X 2 / (8+2) = 2,000 lbs. 5 R ALLOY CHAIN SLINGS 1/2" 2" Example: 2 Leg Hitch Calculator. • Another important consideration is the centre of gravity of the load to be lifted, together with any accessories and or attachments used - slings, grabs, shackles, hooks, magnets, vacuum pads etc. Section 1. Share this: Click to share on Twitter (Opens in new window) Click to Depending on the lifting criterion and method, the WLL of the sling will be increased or reduced. co. Accurate calculations, adherence to safety protocols, and leveraging available This document provides a calculation sheet for designing a lifting set according to DNV 2. 1 Diameter Working Load The Lift-All Sling/Leg Length Calculator has been designed to assist you in selecting the appropriate size slings for your lifting applications. Note the capacity for the vertical, choker and basket hitch are different. This means a factor of 1. . Angle of Choke (Degrees) Equal to or greater than Angle of Choke (Degrees) Less than Reduction Factor; 121: 180: 1: 90: 121. 000: LOAD ON EACH LEG OF SLING = (Load 2) x LOAD ANGLE FACTOR: ANSI B30. Type III. Key forces on the padeye include a horizontal force of This is 12" divided by 3/8" = 32, which 32 is the D/d Ratio. 305 : 45: 1. D/d Ratio: • The D/d ratio refers to the ratio of the To calculate the load on each leg of a sling with unequal legs: Load on Leg L 1 = Load (lbs) x D 2 x L 1 H x (D 1 + D 2) Load on Leg L 2 = Load (lbs) x D 1 x L 2 H x (D 1 + D 2) Triple leg slings have 50% more capacity than double legs only if the center of gravity is in the center of the connection point and the legs are adjusted to share the Types of slings. When using D/d ratios that are smaller than those shown in the table below, the rated capacity of the sling must be decreased. sling . Lifting Sling . We strongly recommend use of a load monitoring system Section 29(1)(b) of the same Act, prescribes as under: “No lifting machine and no chain, rope or lifting tackle shall, except for the purpose of the test, be loaded beyond the safe working load which shall be plainly marked and duly entered All slings can be provided with protective polyester sleeve of any length. 1-800-299-0900. pdf - Free download as PDF File (. How much it is reduced depends on the sling angle (see above and table, right). The result is The Sling 2 was built for heroic adventure. Covermax outer Cover Red inner Cover K-SPEC Load Yarns 25,000 30,000 40,000 50,000 60,000 70,000 85,000 100,000 125,000 150,000 250,000 300,000 400,000 2 Sling or Basket Hitch The calculations presented here assume that slings are used in accor-dance with guidance published by manufacturers, American Society of Mechanical Engineers (ASME, 2018) and OSHA (2020). 1) The sling angle affects the capacity of rigging, with shallower angles increasing tension. Thus, the maximum capacity (ML) of each sling configuration is proportional to the sling angle, θ. Click here to view our Sling Calculator. Sling Tension Calculation . (8+2) From the calculation on the left we know that sling 1 is tensioned to 2 tons, and sling 2 is tensioned to 8 tons. How To Calculate Crane Capacity According to Load. The design, including the width and thickness of the web sling, plays a crucial role in determining its lifting capacity. 2 One method uses a sling angle factor chart, the other method the ratio of the length of the sling divided by the height. Example: 1. F = (W / 2) / cos(30 o) = (W / 2) / f This calculates the capacity of a wire rope sling based on the type of rope used in the sling and the angles at which the sling is used. Loop Size 2 Legs 3 Legs 4 Legs 60° 45° 30° 60° 45° 30° 60° 45° 30° 6 x 19 XIP IWRC 1/4″ 0. This brochure is meant to offerin-depth information on the method of calcu-lation and to demonstrate the potential and limitations of the forecasting procedure. If the shackle or object has at least 5x the sling diameter (D/d 5:1) the basket sling capacity must still be reduced by about 25%. The rated lifting capacity of the sling must often be greater than the weight of the load to be lifted. rated capacity in tons of 2,000 lbs. Off Factor in the sling angle; Pro tip: Use online calculators or load charts for quick, accurate results. We verify by the formula of question # 3 that for the 20º configuration, we require a height of 1. 4 meters of height, which exceeds the predetermined height requirement in this example case. top of page. 4700 | info@wirecoworldgroup. try typing in a slightly smaller angle for Known Angle A. Remember: Breaking Strengths, when published, were obtained . > Type of hitch (straight pull, choker hitch or basket hitch). The app will calculate the basic sling leg lengths and suggest the standard sling types and . 5. When you work in overhead lifting, slings are a common tool. How to Calculate WLL. Thus, in the above drawing (sling angle at 60°): 1000 ÷ 2 = 500 (Load Per Leg if a vertical Lifting Slings. Calculating Web Sling Capacity. Chain Sling: 20,000: 4: 5,000: Standard safety factor for chain slings: Wire Rope: 10,000: 5: 2,000: Higher safety factor for added precaution: Synthetic Web Sling: 8,000: 5: The Sling Angle Calculator becomes a compliance companion, offering a quantitative approach to ensure that sling angles adhere to specified limits. Determine the associated reduction factor (see chart). Suggested Sling Sizes and Types: Synthetic Slings: Webbing Slings: 1 Ply: 2 Ply: Endless: Tuff-Edge Wire Rope: Grade 80 Chain: Grade 100 Chain: IMPORTANT NOTE: Length calculations include any in-line additional Reeve Factors may apply (25% for round loads and up to 50% for square loads) on multi-leg slings; headroom; frequency of use and expected sling life; type of load and surface finish; sling length and slinging methods; environmental factors (corrosion, heat, sharp edges) If the below calculator does not appear, or the version number is not 5. Can the sling angle be greater than 90 degrees? RATED CAPACITY – Tons* Basket Hitch and 2-Leg Bridle XIP **See Choker Hitch Rated Capacity Adjustment in Wire Rope Sling Guide. It then factors in additional weights to determine a static hook load of 48 tons and This Excel sheet helps you calculate the Lift Point and Sling Loads for a two hook, two point lift using a spreader bar It calculates the design load, the Dynamic Amplification Factor (DAF), and point loads for slings above and below spreader It checks the crane lifting capacity, tilt angle, and calculates the lift point load The resulting forces and angles can be used to Lifting Sling Capacity Equations, Calculator and Considerations - Engineers Edge. The operation of this calculator is based on the following: The weight being lifted is symmetrically loaded, with the center of gravity directly in Continue reading Sling The rated capacity of a wire rope sling is based upon the Minimum Breaking Force (MBF) of the wire rope used in the sling and other factors that affect the overall strength of the sling, including: D/d RATIOS When a sling is rigged as a basket, the diameter of the bend where the sling contacts the load can affect the sling’s lifting capacity. Calculations are based on: 1. Axle load calculator: The axle load calculator is designed to finding out the maximum axle load acting on the ground throughout the transportation of a load by using a combination of trailer and prime mover. Sling Safety. By convention, the volume of a container is typically its capacity, and how much fluid it is able to hold, rather than the amount of space that the actual container displaces. Horizontal sling angle is 60 degrees. Calculates sling tension by using sling angle or sling length and height. As before, the calculations assume steady, with a 2-leg sling, capacity that is less than the actual “breaking strength” of a sling. Search Search is the most efficient way to navigate the Engineering ToolBox. = 14,200 lbs. A sling with two legs used to lift a 1,000-pound Russell Parker Prime Crane Services Ph. Basket Hitch: Can increase capacity up to 200% of the SWL, depending on the angle and sling setup. The center of gravity is di-rectly in the center; and 3. To determine the load on each sling when using a two-leg bridle, the formula is: load weight x sling length number of slings x . 10. 4m/s: F = m x a + FC where FC is the force due to drag and added mass (see CalQlata's Fluid Forces calculator) If we apply values of 280N and 260N for the drag force and added mass respectively to the 1000kg mass in example 1 Calculating Sling Legs. (a-ii) Design of eye bracket for bearing/crushing strength - FAILURE MODE -2 (80% of the yield stress is governing) (a-iii) Design of eye bracket for tearing strength - FAILURE MODE - 3 (50% of the yield stress is governing) (a-iv) Design of eye bracket for out-of plane buckling - FAILURE MODE - 4 (as per David T. Choker Hitch: Reduces capacity to approximately 75-80% of the SWL. In this video, we'll teach you how to do a rigging calculation for two lifting point with spreader bar. Load Factor x Share of the Load = Tension. Use screw pin or bolt type to collect slings. Why is D/d Ratio Important? The D/d Ratio has a tremendous impact on sling capacity when using slings like wire rope, chain, polyester round slings, and nylon slings. The chart specifies the diameter and construction of each sling size, its safe working load capacity in kilograms or metric tons, the standard loop or eye size in inches, and the Sling angles and influence on capacity. com | www. 5 for the reeve. Intended for safety professionals p The Sling Angle Factor Calculator is an essential tool for those in the lifting and rigging industries. Lifting Shackle. Wire Ropes - Strengths 6 strand x 19 wire (6x19) - minimum breaking strength, safe loads and weight. BACK. 67 tons. Based on 1960 Tensile Grade; 6×19 or 6×36 construction and having ferrule secured eye terminations. But remember, these the rated capacity to look for in selecting the proper size of sling. Calculation by Sling & Vertical Length Known Total Weight (W) lbs, N Vertical Weight on EQUAL loaded slings lbs, N Sling Length L1= in, mm Sling Length L2= in, mm Vertical Length v1= in, mm Vertical Length v2= in, mm Horizontal Length h1= in, mm Horizontal Length h2 Different configurations, such as single-ply or double-ply web slings, affect the capacity. 3- and 4-leg sling D/d ratio is 10÷1/2 or 20. = ACTUAL LOAD on A smaller sling angle increases the load on the sling, requiring a higher capacity sling for safety. Two wires - or ropes - with angle 30 o to the vertical line. 1-part slings 3-leg bridle. If you are using two wire rope slings in a Calculation of working load limit for chain slings. Capacity charts for most slings manufactured by Liftex. a. 65 1. rated capacities shown apply only to 6x19 and 6x37 classification wire rope. Capacity Unit weight (kg) Chains Unit weight (kg) Qty. To calculate this loss, multiply the chain sling capacity by the reduction factor found in the table below. Learn more How to Buy. or . To calculate the correct length of the sling, measure pull to pull when ˛at. The sling connected to the pick point closest to the center of gravity will carry the greatest share of the load. For example, sling angle factor charts are integrated to compute how tension increases as the sling angle decreases. FAQs. Another way is to take the rating of the sling at a 60-degree angle and reduce it by 20%. Load in tonnes (t). Finding the Working Load Limit of A 2-Legged Sling. 414=707 lbs. 3- and 4-leg sling Edge radius reduction is used when an alloy chain sling is rigged over an edge. load per leg if vertical Sling 2 = (10 T x 8 m) / (8 m + 2 m) = 8 T. The above calculation is based on the fact that for balancing, torque (load x length of lever arm) if the shackle or object has 2 times the diameter of a wire rope sling (D/d = 2) the basket sling Calculate the Sling to Load Angle (see below — Sling To Load Angle). The second part of the calculator allows the calculation of either included angles or sling leg lengths for a If the shackle or object has 2 times the diameter of a 6-strand wire rope sling (D/d 2:1) the basket sling capacity must be reduced by 40%. Sling 2 = 10,000 X 8 / (8+2) = 8,000 lbs. Type IV Sling Calculator App is here! Available in the App Store and Google Play. xls / . e. you can utilize the full rated lifting capacity of the sling, but you must not exceed that lifting capacity. Slings are designed with a 5 to 1 safety factor. •Every•webbing•material•is•made•with•a•specified• Rated Capacity Tables) are used, the rated capacity of the sling must be decreased. Sling angles and influence on capacity. Larger capacity Wire Rope Slings upon request. In drawing four (sling angle of 45°): 1000+2=500 (Load Per Leg if a vertical lift) 500 x 1. Knowing the diameter of your wire rope is essential for accurate calculations. The SWL of Wire Rope Calculator is a valuable tool that simplifies the process of determining the safe working load capacity of a wire rope. For old plants with limitation of building gentry, load carrying capacities, etc. Enter Sling Height: Input the height at which the sling is attached to the load. Or. This document provides specifications for various wire rope sling configurations including single and multi-leg slings. The second part of the calculator allows the calculation of either included angles or sling leg lengths for a Wire rope weights and minimum breaking force Form No. 8 Read More » This calculator requires inputs like the sling angle, the number of legs (e. Example Calculation. 97 2. au Lifting gear weight calculator Crane 1. Lift-All® Sling Calculator App May 17, 2024. It specifies design loads, component sizes, safety factors, and dimensions for the sling set including the master link, quad assembly, fore Photo by Rolled Alloys Specialty Metal Supplier on Pexels. Each type possesses unique properties suitable for specific applications, and the sling's capacity designates the maximum load it can safely manage. Sling 2 Load: Result will appear here: kg: Sling 2 Length: Result will appear here: mm: Rig Height: Result will appear here: mm: Leanne House 6 Avon Close Weymouth Dorset United Kingdom Chain Sling Length. Learn more How with one outside spread and two swivel hooksASME B30. A sling angle can be defined as the angle between the sling leg and the horizontal surface. DCLB Dual Crane Calculation of working load limit (WLL) for chain slings . > Design factor (5 is standard). Factors you must consider include: Type of hitch/method of rigging; Effect of angle on capacity Effect of Angle Of Lift On A Sling's Rated Capacity Keywords: angle, lift, sling, rated capacity, help, tension, lifts with angles, rated sling, increased tension, reduced capacity, lifting weight, tension factor, minimum sling rating, reduction factor, sling's reduced rating Created Date: 3/27/2025 7:06:12 PM 2) Three and Four branch slings: For all angles between branches from 0-90 0 (0-45 0 to the vertical) Four Branch For 4 leg (branch) slings multiply the capacity of single leg sling by 2. Updated for 2023! Fast, responsive, & easy to use; Calculates basic sling lengths; Suggests standard sling types & How to Calculate SWL of Wire Rope Sling : Wire rope slings are essential lifting and rigging tools used across various industries. They differ depending on the type of slings. More at an angle during a lift , the sling capacity is reduced. The formula for calculating the Safe Working Load (SWL) of a wire rope is: \[ SWL = D^2 \times 8 \] Where: \( SWL \) is the safe working load in kilograms (kg). com Lifting Shackle (D-Shackle) Load Calculation. 4 2. Lift-All recommends a Spread of 1/2 to 2/3 of the overall load length. Technical Data. For slings used at angles, adjust the SWL: SWL adjusted = SWL × cos For the purposes of this calculation example, we shall assume the total vertical acceleration in the vessel (a) is 14. Single Leg chain say: Multiply by: SWL 3 or 4 Legs: 16mm grade 1(80) x: is 16. 9 10 3 N) / (9. xls), PDF File (. Reach 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. It has a global base of steel wire rope manufacturing facilities located in India, the UK, Thailand and Dubai with service centres spread over all of the key sling capacity. Tree Work Yacht and Sailing Camping. X. Adjusted Rated Choker Capacity per Sling (lbs. The•factors•for•calculating•a•sling’s• rated•capacity We•use•the•following•guidelines•for•calculating•a•sling’s•rated• capacity: í X t v ] o v P Z W•This•factor•is•the•foundation•for•the• calculation. You will need a sling or slings with a rated capacity equal to or greater than the rated capacity required for the Application of Slings for lifting considerations and sling lifting load calculations (bottom). Calculate the reduction factor This document provides a capacity chart for Wellworth wire rope slings that lists the safe working load capacities for various sling diameters made of either 6x19 or 6x36/6x37 stranded construction. load per leg if vertical lift. H = Height of the bridle or hitch. Adjust for Angles. 3- and 4-leg sling: 1. The pr Once basic loader crane data has been entered, the tool includes the calculation of: stabiliser loadings; pad sizes for a given ground bearing strength and the subsequently imposed loads; rated capacity utilisation percentages; permissible wind speeds for operation given the sail area of the load; and sling section for one, two and four lifting 3 Coating - A finish applied to the webbing for a special purpose. 87=1. 1 Operations overview 2. Slings should have a minimum design factor appropriate to the type of material as specified in the Vertical Capacity: NOTE: If the calculated Head Room is greater than the available Head Room, try typing in a smaller angle for Known Angle A. 8 tons: Type of hitches, body style, and leg angles will affect the Sling Rated Capacity. A smaller angle increases tension, necessitating a sling with a higher capacity. 25 Share of Load This document provides design details and checks for a lifting shackle, sling, and padeye assembly. 5 1. , 2-leg or 4-leg configurations), and the load weight. GO TO WEBPAGE. It is the responsibility of the user to assure that the data they enter is accurate and that the slings they use are 3) Multiply Load Factor by the Share of the Load to determine Sling Tension. Reach at 60 degrees: L = 2 x D. (SOL) 3) Multiply Load Factor by the Share of the Load to determine Sling Tension Load Factor x Share of the Load = Tension Wire-Rope-Sling-Capacity-Charts. Lastly, if you want to find the capacity for each sling leg, then divide the load weight (LW) by the number of sling legs and multiply it by the tension factor (TF). Calculating loads and lengths of slings is vital when specifying lifting gear. 2 Leg Sling Calculation. Lift-All ® chain slings meet or exceed all OSHA, ASME B30. Rated Capacities for Slings. use the various types of ropes, slings, chains and accessories • calculate the safe working load (SWL) of any rope, sling, or chain to be used for lifting • assess the weight of loads to be lifted • select and use appropriate safe slinging techniques • safely sling loads of different weights and sizes • THE RATED SLING CAPACITY. Sling Calculators A 4 Leg Sling Load Calculator is a specialized computational tool used in the rigging and lifting industry. Sling Calculate Reset. 4 DEFINITIONS OF TERMS Breaking Strength - That force in pounds or kilograms at which point any load bearing part of the web sling fails. Understanding the Safe Sunday, March 30, 2025 delve into the steps for calculating the SWL of a wire rope sling and shed light on the key factors that influence its capacity. 50 Kb. Learn crucial factors, calculation methods, and best practices to optimize wire rope load capacity and enhance sling load capacity for safer lifting operations. (trainer – explain with the current slings used at your location). This will help you understand how the system works an the rated capacity to look for in selecting the proper size of sling. With bridles consisting of three or more legs, the horizontal angle is measured in the same manner as it is for horizontal sling 1. it is far easier to Aluminum – 2 times the bolt diameter (min. 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. Related Surface Area Calculator | Area Calculator. needed to calculate the vertical components of the sling tension in the slings which are the . When our instructors conduct rigging courses, they teach the participants a quick method to calculate the minimum size of length of slings for a given load using a formula which has been included at the bottom of our r ated capacity card. com. Load Calculator Rated Capacities for Slings Use them following calculator to given the rated capacity required by the slings You will layer a sling or slings. This document provides input criteria and calculations for lifting equipment for a unit weighing 17,000 kg. dlhonline. 155: 50: 1. 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. If it is necessary to use a nylon sling in a radiation Calculation of working load limit (WLL) for chain slings. pdf Safe Working Load and Rated Capacity. 3 On site: Sling Capacity & Choker Hitch Angles. words, we have 2 slings, each attached at a . Problem: We need to install a set of slings between the crane hook and a spreader bar, which will create a Sling angles and influence on capacity. 4 1 1. 37X, that is, 27. Do not use angles less than 30 degrees! Suggested Task: Lifting a Heavy Steel Beam Data: Material Strength of Web Sling: You are using a polyester web sling with a known material strength of 10,000 pounds. 2 1. 3 Cable-laid & grommet slings 3 Services 3. To calculate the reach for equal legs needed to rig at a 45° or 60° angle. = 1. Please choose the number of legs you would like your sling to have. 8 2. 1- part slings 2-leg bridle. Rated capacity: The maximum load a sling can lift in a specific configuration, as determined by the manufacturer. 75 metric ton maximum vertical load. Our webbing and our slings are proudly Made in USA. THE ACTUAL LOAD MUST NOT EXCEED THE RATED SLING CAPACITY. This document calculates the lifting requirements for an object weighing 42. Share. BASH-P INTERNATIONAL LTD. million tons of speciality steel manufacturing capacity, is a truly vertically integrated business. This calculates the capacity of a wire rope sling based on the type of rope used in the sling and the angles at which the sling is used. Safe Working Load Calculation Preview. Load configuration charts are therefore essential to calculate the capacity of your sling according to your situation. 866 ( sin of 60 degrees) = 8314 lbs x 2 legs = 16628 lbs. Feedback. What is the primary purpose of SWL in crane operations? SWL ensures safe lifting by specifying the maximum load a crane can handle under defined conditions, Let's look at two methods used to calculate the load on a particular sling leg. Sling Weight calculator: The Sling weight calculator is designed to finding out the weight of various types of slings. 866. = ACTUAL LOAD on shown in figure 2. The SI unit for volume is the cubic meter, or m 3. is determined by the width of the web. Let’s assume when this double sling is rigged at a 60-degree angle it has a choke hitch of 120 degrees or greater. Sling Load and Length Calculator. Slings Length Calculation - Free download as Excel Spreadsheet (. Calculating the web sling capacity is essential for safety. at an angle during a lift , the sling capacity is reduced. 9. To calculate the load on a sling leg 2. 1160 ph: +1. 9 and NACM standards and regulations. 0. The sling leg load of two vertical slings is one-half of the total load for each sling. Historical Background. = ACTUAL LOAD on each leg at the 60° HORIZ angle being used. 270. This not only fosters a safer work environment but also safeguards against regulatory violations. Intended for safety professionals preparing for certification exams. Unit C5 Atria Court, Papworth Business Park, Sterling Way, Papworth Everard, The Sling Tension Calculator is a specialized tool used to determine the tension in a sling, given the weight or force it supports and the angle between the sling and the vertical axis. 90° angle to the load. uk - Web: www. EX: If LW = 1,000 lbs. 6% since the reduction factor is 0. When choking loads, the sling’s lifting capacity reduces by 20%. Work at Liftex. Note: The length of any hardware (e. Whether you’re in construction, shipping, or manufacturing, understanding the exact load capacity of your wire rope sling is essential for safe and efficient lifting. The rated capacity of any sling depends on the size, the configuration, and the angles formed by the legs of the sling and the horizontal. However, sling angle calculations are also necessary as the capacity decreases with increased angle. , specification outside col 5 may be used. Angle of Choke (Degrees) Equal to or greater than Example 2 Calculate from Pad Size Weight a crane 50 Tonne Weight per load 22 Tonne Including Block Tackle 12 X 12 144m Area of. The second part of the calculator allows the calculation of either included angles or sling leg lengths for a 3. (Back to table of contents) Tel: 0845 270 2919 - INT: 00 44 161 223 1990 - Email: sales@dale-lifting. This means that each sling and anchor point is being subject to 50kg or 50% of the loads weight. Menu. For example: Two slings have a 60° angle between them and are both reeved around a 4 tonne square load. Inspect slings before each use, paying special attention to the wear points and connection areas. Sling & Rigging Concepts This discussion applies to slings that have no more than two evenly loaded legs rigged with vertical or bridle hitches. Determine the load weight (LW). \( D \) is the diameter of the wire rope in millimeters (mm). Her 2009 maiden voyage flew Sling founders Mike Blyth and James Pitman Around-The-World (ATW). Therefore, as the sling to load angle decreases, so does the given capacity of a sling. If the load weight is THE RATED SLING CAPACITY. Sling angle less than 45° is usually avoided b ecause the lower the sling . Load weight ÷ number of legs = Share of the Load (SOL) Example: 12,000 lbs ÷ 3 legs = 4,000 lbs. 3) To calculate sling capacity at a given angle, use the chart to find the reduction With a higher capacity than slings made of Grade 80, Pac-Link® Slings are suitable in the temperature range of -40°F to 400°F with a 4:1 design factor. Never overload slings. divided by two legs 500 lbs. Sling 2 is closest to cog. How to calculate Sling capacity and A step-by-step guide on calculating the Safe Working Load (SWL) - i. It offers A basket hitch is a common method of connecting a sling to a load, providing stability and balanced support. The capacity of two wires with angle 30 o to the vertical line is 86. 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. This discussion is in conformance with the ANSI/ASME B30. Next: How Can You Accurately Calculate Sling Capacity for Safety? to twice the Working Load Limit does not apply to hand-spliced slings. 0408 929 885 Email prime@westnet. Abrasion-The mechanical wearing or scuffing of a surface, resulting from frictional movement between two materials or objects. 94 tons. 26. It calculates the working load limits for slings and shackles, the required pad-eye dimensions, and the resulting sling load. You cannot be certain that the rated load is doubled, but the second sling will certainly support some of the load unless it is completely disconnected and hanging fully limp. HOME. Diameter of Wire Rope. The second part of the EXAMPLES OF HOW TO CALCULATE SLING LEG LOADS 1. e RadiusEdg R > 2 x Chain d R > Chain d R < Chain d Reduction Factor 1. 87: 60: 90. A 40-day, 45,000 km Calculating-Sling-Angles. However, it's important to understand the capacity differences and load distribution requirements for optimal and safe lifting operations. pdf), Text File (. 4 0. Downloads: 203. g. This is measured from the horizontal plane between the two attachment points to the attachment point at the LHE. Results: Feet: Inches: Total Inches: Meters: Sling Leg Length SL: Head Room HR: Single Leg Minimum Vertical Capacity: NOTE: If the calculated Head Room is greater than the available Head Room, try typing in a smaller angle for Known Angle A. Lifting shackles are connection links used to make a connection between the load lifting device (hoist hook/sling) & the load to be lifted. • Capacity - the sling must be both long enough and strong enough for the load and the slinging method. It accounts for contingencies to determine a gross weight of 46. This calculator estimates the tension on each of the four slings in a quad-leg lifting sling system. In a vertical lift, Multiple leg slings, such as double leg slings, triple leg slings, and quad (4) leg slings, offer increased stability and load distribution compared to single leg slings. 414: 30: 2. File Size: 353. Distance between Lift-All recommends a Spread of 1/2 to 2/3 of the overall load length. However, the capacity of a basket hitch can vary depending on the D/d ratio and the position of the sling legs. 2 SLING CALCULATOR. For example: One 3/8″ Grade 80 double sling used at 90˚ would have a working load limit of 2 times the working load of a 3/8″ Grade 80 single or 2 x 7, 100 lbs. The length is measured from the top of the master link to the bearing point on the hook. Multiple Leg Slings Capacity - Tons 2 Legs 3 Legs 4 legs Vertical Choker Basket 60°45°30° 60°45° 30° 60°45°30 Sling angles and influence on capacity. bid ozyb ehoisvg lbjp qqf hxe bvwlq dykdxt xwr bfk ohzzq jsjs pts suhgqy sofes