Basic Rigging Fundamentals Questions and Answers Already Passed

Document Content and Description Below

Basic Rigging Fundamentals Questions and Answers Already Passed What should be given a visual inspection prior to use? ✔✔All rigging equipment slings and hardware What do you do with defective... components? ✔✔Destroy defective components What is the most important precaution in hoisting and rigging? ✔✔The most important precaution is to determine the weight of the load before attempting to lift it What is the SWL and when is it determined? ✔✔Safe Working Load of all equipment, slings and hardware and once the weight of the load in known. What is necessary before any crane lift? ✔✔A lift plan What is a lift plan? ✔✔This identifies the requirements needed for the primary areas of every lift. What are the requirements included in a lift plan? ✔✔It identifies the size shape and weight of the load, where it will be lifted from, where it will be placed and the placement of the cranes. What determines the size of the crane used, where it is placed and the required site preparations? ✔✔The important load and site factors that are describe in the systematic assessment of the lift plan. What are the important load and site factors of the lift plan? ✔✔The size and setup of the crane as well as the up to date inspection report, the step by step movements of the crane and the environmental lifting conditions. What is included in the documented plan? ✔✔The name of those preparing the plan, designate the lift supervisor, crane operators, riggers and their state qualifications, and copy going to any designated authority What are the four types of hoists? ✔✔Come a long, Chain Fall, Gantry and Monorail Why is the come a long/ chain fall the most abused pieces of rigging hardware equipment? ✔✔Because it is generally severely overloaded At what percentage are hoist factory tested at? ✔✔150% of capacity When do the handle of most come a long hoists flex? ✔✔When overloaded, so take this as a warning to back off and not put a snipe or cheater over the handle How does overload easily happen on a chain fall hoist? ✔✔It is due to the gearing system and two people on the hoist chain trying to lift more than it is rated for What are the two types of chain fall hoists? ✔✔1/2 to 2 ton and 5 and 6 ton What is a Gantry or Monorail hoist? ✔✔Smaller over the floor hoists What are the guidelines are there for the Gantry or Monorail hoists? ✔✔Check the hoist before and service regularly, use the hoist properly, keep everybody clear of load, do not wrap the hoist load chain around a load as a sling, do not ride on moving loads, do not hotrod with a powered hoist What does it mean to hotrod with a powered hoist mean? ✔✔Not jerking or shock loading the hoist, traveling to fast, allowing the load to swing or bump into objects. What are the steps to the jacking safety process? ✔✔Jack on end and insert roller, chock roller jack other end and insert rollers, place rollers in front, move back roller to front, change roller direction, use planks under rollers, and chock rollers when not moving. What are the jacking safety points? ✔✔always keep jacks vertical, avoid using only one jack, all jacks should be the same type and capacity, use a piece of hardware between the jack and the load, and do not place jack directly on the ground when using outside. What are the jacking process procedures? ✔✔the jacks should be operated simultaneously, use temporary blocking under the load after each jacking sequence, do not overload a jack by using a cheater bar, remove the jacking handle when not performing the jacking process, do not leave the load on jacks for extended periods, use blocking or cribbing. With cribbing what cant be higher than the length? ✔✔The height When using a u bolt clips, where must the u section be? ✔✔On the dead or short end Which wire rope clip offers a wide bearing surface for maximum strength and greater holding power than the u bolt clips? ✔✔Fist Grip or J clip Type When are you supposed to tighten and re tighten the clips? ✔✔Tighten before tension is placed on the ropes and re tighten after load has been applied to the load Why is it important to use the correct clip lay grooving to match the lay of the wire rope? ✔✔Otherwise the grooving edges will cut across and damage the rope and wire strands What is the rule of thumb for the number of wire rope clips to be used? ✔✔The diameter of the rope X3 + one to next whole number What is the rule of thumb for spacing of wire rope clips? ✔✔The diameter of the rope X 6 What are the steps for proper clip installation? ✔✔Apply first clip one base width from dead end, apply second clip nearest eye as possible, place all other clips, tighten all nuts to recommend torque and recheck torque after rope has been in operation. What are the two most commonly used shackles? ✔✔The screw pin anchor and the screw pin chain. How are shackle sized? ✔✔By the diameter of the bow section and not the pin diameter Where is the SWL of each shackle embossed? ✔✔On the bow section and rated in tons. What is the anchor type of shackle best suited for? ✔✔Using two slings to lift a load What are the general shackle rules? ✔✔Only use the shackle if there is a embossed rating on the bow, only use proper manufacturers pin, never use if pin can roll under load, and never weld any type of rigging hardware What are the two types of eye bolts and what are the differences? ✔✔Shouldered is straight and unshouldered is pulled out at a max 30 degree angle and is seated What dont you do with a shoulderless eyebolt? ✔✔Do not angular load it. What is the reason for never running a sling through a pair of eyebolts? ✔✔The resulting sling leg load stress on the eye bolts will be greater than if two separate slings are used which will create a comprehensive force on the load. What is a swivel hoist ring ? ✔✔This is a type of eye bolt that swivels 360 degrees and pivots 180 degrees What is a side pull hoist ring? ✔✔Similar to an eye bolt except it is designed for a 90 degree side pull, rating it at 100% capacity and is used with a shackle for sling attacment When should synthetic slings be removed? ✔✔Acid or caustic burns, melting or charring, snares, punctures, tears or cuts, broken stitches, distorted fittings or the colored core warning signs are showing What are the different types of slings? ✔✔Wire rope, synthetics, metal mesh or chain What must the identification tag of all slings have on it? ✔✔Name or trademark of manufacturer, diameter or size, type of material used, rated load for given type of hitch, and lift angle upon which the load rating is based. When working with slings, what is the rate load? ✔✔maximum allowable working load established by the manufacturer What are the more commonly used terms to describe the Rated Load instead of using the term Safe Working Load? ✔✔Rated Capacity and Working Load Limit What is the SAFE lifting angle for sling legs? ✔✔60 degrees to the horizontal with the minimum being 45 degrees or higher Why is it important for the sling legs to be at 60 degrees? ✔✔This creates an equilateral triangle where all the sides are the same lenghs How is the center of the load determined? ✔✔By laying a sling across the load, marking the two pick up points or by using a tape measure What happens to the load angle factor when the angle increases? ✔✔The load angle factor decreases. Meaning the greater the angle degree the less weight that can be lifted. What is the rigger rule formula 1? ✔✔Sling length divided by vertical height from hook to load giving you the the Load Angle Factor. Multiply the factor by the load weight and divide the answer by two for a two leg sling What is the calculating pipe weight formula? ✔✔Pipe O.D. X Wall thickness X 10 = Lbs. per foot Never force the eye of the sling down and always use softeners, True or False? ✔✔True [Show More]

Last updated: 1 year ago

Preview 1 out of 9 pages