These are rule of thumb formulas but close to a manufacture's chart. Consider the Safety factor (Generally taken 5 for wire rope, except taken 10 while use for lifting person) For sling, SWL depends on the length of the sling leg (L) and the headroom between … In the absence of these tables, you must apply a thumb rule formula to obtain the swl. D2 X 6. The SWL is also sometimes referred to as Normal Working Load or Working Load Limit. ... SWL Rule of thumb unknown rope. Used in a basket hitch with the legs at a 90° angle to the load, it would have a working load limit of 1,000 lbs. A thumb rule formula is. Wire Rope WWW.HANESSUPPLY.COM 1-1 1 W i r e R o p e Complete Contractor and Industrial Supplier • Sling and Rigging Specialist Since 1930 Visit us online at www.hanessupply.com Used in a choker hitch, it would have a capacity of 375 lbs. SWL for galvanized rope. This ratio has an effect on the rated capacity of slings. Additionally, they can be attached to wire rope, line, or chain. SWL for Guy Lines. The formula for computing the SWL of a wire rope is the diameter of the rope squared, multiplied by 8 (D x D x 8 = SWL … Wire Rope Calculator. GUIDELINES FOR MOORINGS 0032/ND Rev 2 Page 5 of 39 1 SUMMARY 1.1 SCOPE 1.1.1 This document describes the guidelines which will be used by GL Noble Denton for the approval of but it is essentially a collection of small filaments wound around each other in a manner that largely retains its shape when bent, crushed and/or tensioned.. SWL = 12 × 12 × 8 = 1152kgs. Wire Rope Size Sling Eye Width Sling Eye Length D2 X 40 5. This chart takes into consideration both the line pull of the hoist drum of the crane and the safe working load of the wire rope. Used in a basket hitch with the legs at a 60° angle to the load, it would have a working load limit of 866 lbs., etc. For wire rope, FS is 6 for general purpose and 7 for heavy industry. SWL = D2 X 5. (this is based on safety factor of 5) Example: safe working load of ½ inch wire rope = ½ x ½ x 8 = 2 tons (These formulas cannot be used in metric systems). D2 X 40 3.5. safe working load (SWL): The manufacturer's recommended maximum weight load for a line, rope, crane or any other lifting device or component of a lifting device. Thumb Rule for Determination of SWL of Wire rope slings: SWL = 8*D 2; in Tons; Where D diameter of rope in inches. There are rules of thumb that may be used to compute the strength of wire rope. When using a shackle with wire rope, the shackle must be equal to or larger than the wire rope diameter. Length for seizing. The SWL is determined by dividing the minimum breaking strength (MBS) of a component by a safety factor assigned to that type and use of equipment. SWL, NWL, MBS — all of the acronyms can get very confusing. SWL, NWL, MBS — all of the acronyms can get very confusing. all wire rope slings fabricated by Yarbrough will have these approximate dimensions.