Considering the Safety Factor is built into the rigging, this is a fantastic demonstration.

This is my favorite video on how to figure this out. Years later, I'm back to this no-frills explanation. Excellent.

your video was very helpful, easy to understand, and well put. Thanks,

For learner or safety personnel it's v informative...Thank sir.

thanks for posting this, i truly understood now

How can I calculate the breaking strength/force.And how will I calculate or determine if the sling is correct one to use with calculations.

Thank you. This helped.

Excellent way of explaining Love ❤

Thank you. Easy to understand

thank you for your work

I like the way you talk slightly slow sir. It provides me time to take notes 👍 thanks

Thank you..very clear explanation🌷

Thank You , very good information .

Thank your video,really helped me

Great info - thanks!

thanks for your information

Thank u so much for your excellent way of explain for easy understand.

This vide is very helpful

Thanks for the clear tutorial. Sub'd to your channel as a result👍🏽

Noted ..helped me with my elevator home work . Thank you

Thanks for video its make me easier to tell

It's really nice video... Because, this video is more helpful for me... Special thanks a lot... ❤️

I work construction rigging etc and this is basic thanks teacher you explained it a lot easier than how I learned it on the field lol

Thanks

Thank you sir 🤝

Thank you sir. Thank you very much

Dustin Outlaw, Theknotman1964 is from the UK. When he talks about not going beyond 90 degrees, he means 90 degrees at the hook which translates into 45 degrees from the horizontal.

good idea

Good job cousin

How do you calculate the sling loads in a four point system which is asymmetrical i.e. the COG is away from the centre of the object? Please provide solutions for this if you have. Thank you

Nice vide

hi. thank you for tha video. please could you explain me, when we do these calculations ? because how can we know the distance between hook point and load....

Thank you sir

Do you have the problems that deal with figuring out the valume and weight of tanks, steel pipes beams etc....cant find anything the can help me me on steel pipes for the ncccco test

I start my apprenticeship with cranes tmr, and have a question, the straps vertical safe working load at 90Deg is 6000K . but on the diagram you draw the straps at 45 Deg. angles. from the hook. does that pose a problem ?

Awesome

Apply resolution of forces..Tension on each sling = 6000 /Sine theta = 6000 /(4/6) = 9000 lbs

Sir plz make video on 3 leg and 4 leg tension calculation formula

Hello I appreciate so much this video and can you please add one video for how to pass the interview for crane operator? thank you so muck for anyone who upload.

Plz make a video about centre of gravity of a weight.

awesome- thanks

Grate information, i would like to learn to calculate the load chart of a boom truck40 ton and under with a series 456b with a 18ft jib. ( the gross capacity, net capacity,what does they represent or mean. ) looking forward for another grate class one love thank you.

If 4 sling is divided by 4?

please I need more informaitn about Riggers safety and calculate

Good

So if you use 3 strings instead of 2 to lift the weight it is X times 1/3 of the weight. Or am I reading this wrong?

I want to know how to convert this method of reference to metric? Or worse. Where do the number compound to the point that this method is not set in stone. Feet divide into twelve equal parts. Pounds divide into sixteen. Like celcius and Fahrenheit? Only works at -40°. Probably be close for a quick check though. Nice.

The step #2, isn't it supposed to be X times N (number of slings) times W instead? And, how about a 3-dimensional beams, the case with slings with different x-y-z coordinates, can we calculate it the same way?

How come you dont compare the 9000 lb answer at SWL 45 degree angle.? Are all angle loads compared to 90 degree SWL?

Tq

Estou a tirar o curso e o professor pede para assistir esse vídeo, não percebo inglês e não há legendas

and using 4 legs slings?

An increase in the calculated load

How to get height between hook and load?

Sir i dont know how to calculate "H" please help.

Safety is our top priority..

These are the basic principles of rigging operation safetly.

if the horizontal angle of ur sling is 60 degree....then we should multiply 9000 with 1.155( loade angle facto for 60 degree). the answer would be bigger than SWL OF WEBSLING IN verticle position.am I right or not?

Sr. Why do you ad 1000 lb to 9000 lb. Thanks. To work in x,y,z plane I have to vectorize the forze on each componentes, and if I require a dinamic movemen i have to consider the graivity force. Isn´t it? And Thanks for all.

tanxx

How you know weight is 12000?

It's stupid to forget about the angle! An object lifted by 2 straps with an angle smaller than 30 degrees woulds require straps with more SWL than the weight of the object. In other words: if the angle is smaller than 30 degrees with 2 straps it is saver to use only one strap.

How to get the sling height

Can't you just multiply by the sine of the angle? Say a vertical sling is considered to be at 90º and you have two slings at 30º and each sling has a SWL of 1000lbs; you would calculate the sine of 30 (0.5) and multiply it by the SWL, giving you a SWL of 500lbs per sling. Is this accurate?

This is part of the test when your doing your Sparrows Stage 2 Certificate in the UK So thanks for posting it As for Dragonf1sh below you need to go back to training school if you want to forget about the Angles because the bigger the angle the more weight is on the strop But 90 deg is the safest angle and i would never go beyond it

simply calculate 1.4 X single leg swl gives 2leg swl 2.1 X single leg swl gives 3 and 4 Leg swl

By the time you figure that out I'll have it lifted already

Please make video, how to calculate load with using block(s)

This is not a 90°lift, right?

Not understand last point.

So rigging is liiiike a box of chocolates?

I really want to know all of you... Q:what is the meaning of injection molding machine clamping tonnage 1600KN?? plz give ans and calculation. help me

#accesstoenergy

I am an Appointed Person, trained to make lift plans. The only thing good about this video is that you can find out the "sling load" but this should NOT be used to calculate the actual lift, because it is WRONG. A Load Weight of 12,000 lbs is, 5443 kg so, 5.45 Tonnes. This is very heavy to be using “slings” or better called Webbing Slings. You will be using a sling that it is too wide and may need shackles to attach to the lifting points of the load, making it unreasonable. Red Lifting Slings are for up to 5 tonnes, Brown Lifting Slings up to 6 tonnes, but these are rated for vertical lifts, angled loads require a much higher vertical rating. Instead, chains should be used in this example. An 8t rated chain can do the job safely. Calculating the Safe Working Load (SWL) - i.e. Rated Capacity - of multi-leg sling/lifting accessory arrangements using Uniform Load Method. The measurement of the HH (hook height) is a bit ambiguous to say the least. The correct way of calculating the HH is based on the desired (included angle, in the UK, is 90 degrees or lower) Or up to 45 degrees on the vertical angle from the load point (vertical) to the angle to the hook of the crane. The most important factor is the desired angle of the chains in relation to the hooking points of the load, which is called (included angle). In this example, I used my Trigonometry Calculator App and I input the known values that this person in this video gave. We know that the right angle from the HH to the base of the centre of the load is 4ft which is (a) side. We know the hypotenuse (c) 6ft, with this information we can now know the angles and (b) distance, which is half of the distance of the load. So, side b is 4.472 ft (1.36 m) x 2 = 8.94 ft (2.72 m) is the total length of the load. The angle beta, which is the angle between the vertical side of the HH and the distance of the sling is 48,18 degrees, making the included angle of 96.35 degrees. I will refuse or not allow this lift given these characteristics because we don't know the sling tension for an included angle greater than 90 degrees. Making numbers out is not the professional way to teach lifting operations.

1. Please don't call them "straps". What you show in the video is a "Web Sling". 2. The Load Angle Factor (LAF) can be calculated by this method from any point on the sling, not necessarily all the way to the hook, (which would be difficult with a very long sling. 3. For practical purposes the rigger should remember the 3 main angles he is concerned with a. 60 degrees is preferred, 1.155 b. 45 degrees is next option, 1.414 and the low limit when going into a hook, and c. 30 degrees which is worst case 2.0 and the low limit going into a shackle or master link.. And for James Kutty Joseph, please do not rig any load until you understand the stress factor. Try holding a 5 gal bucket of water straight down, then at a 45 degree angle and see if your arm feels any additional stress at 45 degrees.

THANKS ... I thought it will actually reduce force when it is at an angle ..still i am not convinced , the resultant force should be the wt of the load , and the sling would divide the total wt of the load in to half ... sharing ... where this extra tension comes from ? since there is no horizontal component in a vertical load!!!!

you did not calculate the sling angle inorder to determine the exact force on each leg, and that my friend is a deadly mistake.

Tanongin mo daw yong isang safety ja

I dont understand

Ok.... So not confuse anybody when you do the calculations for foce of each sling, and compair it to the safety rating on the sling (weight) I and it falls short, of safety for a single sling,...... But you are using 4 slings instead of the single so u got the single sling rating ×4 will that be considered a proper and safe lift ...........🤔

Each SWL of your slings should be at least equal to or more than the full load at 90 degs...................forget working out the angle!!

wrong computation

I really want to say u unstand whatyou said

Presentation is very slow and poor

geeesh can you talk any slower and dry

Thanks