Rigging formulas pdf

Rigging math 1. Rigging Math Calculating our WLL from catalog WLL 2. Basically WLL=UL (d) 3. Basically Working Load Limit Design Factor WLL=UL (d) Ultimate Load 4. But More Like Working Load Limit Design Factor WLL=UL (d) (e) Ultimate Load Efficiency UL (Force Ratio) 5. Rule of thumb methods for calculating the SWLs of flexible steel wire rope, chain and fibre rope. Please note that these methods only give approximate answers. Flexible steel wire rope (FSWR) To calculate the SWL in kilograms of FSWR square the rope diameter (D) in millimetres (mm) and multiply by 8. Formula: SWL (kg) = D 2 (mm) x 8 Here's how you would calculate the load weight of a block of aluminum that is 6 feet long, 3 feet wide, and 4 feet tall: Volume = Length x Width x Height. Volume = 6 feet x 3 feet x 4 feet. Volume = 72 cubic feet. Aluminum weighs 165 pounds per cubic foot (based on the numbers from the table above). Example (2 legs): 1. Determine sling angles. (45°) 2. Select corresponding Load Angle Factor. (1.414) 3. Multiply Load weight by Load Angle Factor to get total load on sling legs. (2000 lbsx1.414=2828 lbs) 4. Divide total load by number of sling legs. (2828 lbs÷2=1414 lbs per sling leg) 5. rigging information rigging information inspection of rigging hardware inspection frequency per asme b30.26 a visual inspection shall be performed by the user or designated person each day before the rigging hardware is used. a periodic inspection shall be performed by a designated person, at least annually. the rigging hardware shall be Intermediate rigging covers all the work done by riggers at the basic level, and also includes: • Rigging of cranes • Rigging of conveyors • Rigging of dredges and excavators • Rigging tilt slabs • Demolition work • Dual crane lifts. Intermediate rigging includes using mechanical load shifting equipment to move, place or secure a load. Handbook of Rigging About the Authors Joseph A. MacDonald—of San Diego, CA—has more than 45 years of editing experience in the engineering and construction sector, including 18 years with Engineering News-Record and Construction Methods & Equipment; as well as 10 years engineering field experience on various construction projects throughout New York and New England. Rigging Techniues Variations in Sling Angle Tables Be sure you understand how a table is referring to the sling angle. Most chain tables reference the angle the sling leg to the horizontal plane of the load. Most wire rope tables reference the angle of the sling leg to the vertical plane of the load. Some tables are based on the angle between NBS (Nordic Boats Standard) METHOD First NBS begins with the description of the type of vessels to which the method is applicable; small boats of less than 15 m in length, with an jib area of less than 1.6 times the area of the mainsail. Second NBS establishes the nomenclature according to the type of rig, depending on the number of spreaders (if any) and if the shrouds are fixed to the RIGGING FORMULA (long) LOAD RESISTANCE (LR) = Vehicle weight, plus the cargo weight, times the mire factor, minus reduction factor. MECHANICAL ADVANTAGE (MA) = Load resistance divided by the winch capacity. If you have a remainder, always round up to the next whole number. TACKLE RESISTANCE (TR) = Ten percent of the load • Basic Rigging planning • Workbook planning exercises Each attendee will receive a Rigging Handbook, Rigging Pocket Guide, and a workbook as part of this class. Upon successful completion they