The top three slinging methods

g'day and welcome back now I know it's been a while quite a while since I've done a um video but I have been off on holidays and doing a bit of a touring Etc um so sorry about um the bit of a delay in videos but look while I've been gone one of the biggest questions I keep getting asked I've got come back to a whole heap of emails and they're predominantly about singing methods and the sort of effects they have on the slings and all that kind of thing now while we do cover a lot of it in the calculations especially on the dogging side um we'll just have a look at how we actually sling a load so I'm still at home at the moment so what I'll do is I've got the trusty old swag here oh got a swing here and we'll look at a few different ways of slinging a load and what sort of effect it has on the sling as well all right so there's three main types of ways of slinging your load okay now the most common one is to choke it so when we talk about choking it um we're talking about breathing the load is uh it's quite often used in the assessments Etc so when they're talking about reeving a load they're actually talking about just choking the load all right now whenever you take a load it's going to have an effect on the capacity of the sling as well now this does uh it does make a difference what type thing you're using as to how much you would derate it so for example I've got these softies here at the moment so if you look at the tag on a softy if you're going to choke a round load it's going to only be good for 80 of its original Total so if we have a three ton sling here that means uh once we choke it um that three ton is now down to what's at 2 400 kilos all right just due to the choke now it doesn't matter if it's a single chaker or a double choke it's still going to be uh that 80 of the previous okay so what we'll do is we'll just have a look at how we take it we'll look at a single choke and then we'll also do a uh double shape as well or double wrap it all right what's up got me old swag out all right now if you're going to choke it right what we need you just you can just throw it over all right bring that up to the top feed the other end through like that foreign that's a simple single choke now if it was just a vertical lift like that then that is going to be good for 2.4 tonne now what you've got to be wary of slide that back off all right now what people are going to do is they're going to have a look when you have a look at the tag here so where it talks about being choked so when we're talking about the chokes there on the swing tag now notice how there's two swings there so down the bottom there where it says it's good for what is it on a single wrap 45 degrees or a double wrap at 60 degrees well that's the maximum day one to allow so if you've got a single wrap no bigger than a 45 degree angle double wrap 60 degrees is the greatest angle but it says it's good for 4.1 tonne or 4.14 tonne that 4.14 tonne is obviously using two slings okay so if you're using a single sling the angle needs to take into account as well like I said on a direct lift it was going to be good for 2.4 ton but if you've got it on a 60 degree angle then what you'll need to do is halve that 4.14 which is going to give you uh what's that 2.07 tonne all right so when you see that 4.14 ton on there keep in mind that's using two slings not the one all right so that's with a choke now to double wrap it all right what we'll do grab this thing again all right now when you're using the slings all right it's always good to make sure you take any twists out of them look at the end of the day you typically gonna can always end up with a slight twist it's not going to make a great deal of difference but what you don't want to do you don't want to twist it all the way up to try and shorten one side all right that's just bad practice and it is going to have an effect on the capacity of the sling as well all right so if we're going to double wrap it all right you can just throw it over all right let's bring it to the top all right let's throw it over again bring it back to the top and then back through there all right now especially if you're going to be slinging a um low or choking your load look whether or not it always is required it's always good practice to double wrap it now if you have something like a bit of Steel working there's a cleat there to stop it from sliding in well then it may not necessarily be need to be double wrapped but if there's nothing there to stop it from sliding in it's always best practice to keep it um keep it double wrapped all right just to stop it from sliding all right so that's probably one of the most common types of slinging methods you'll use is to wrap the loaf or double wrap the load in this instance okay all right now another thing I should probably point out is when I said there's a 0.8 of a or 80 of the capacity when you choke it that's for synthetic slings now it's going to be different depending on the type swing you use so if you're using a flexible steel wire rope swing um you're reduced by 25 all right so in that instance say the flexible steel wire rope what's good for one ton once you choke it you're only good for 750 kilos um and same again with a set of chains now the other big difference is when you're if you're going to go around a square load so with the synthetic sling you'll have the capacity of it around a square load with a flexible steel wire rope you'll have the capacity of it with a chain you only reduce it by 25 uh same as a round one so when you look at the tag on a chain where it's got a looks like a little D shape on the sling tag that's telling you it's the same capacity for both square or a ram load but keep in mind if you are putting something around a square load or around sharp objects try and find a bit of padding to put under it as well to try and protect your slings look it can be something as simple as a bit of cardboard folded up just to take the pressure off those slings on those Corners as well all right so a another obviously the most another common way to do it is with a direct lift so that was if this was to have a eye bolt in it all right you can just basically attach it with a shackle to that eyeball all right and that way there'll be no further reductions in the swing it's just going to be um whatever angle Factor you're going to have in it there as well all right and the other common way of slinging a load is to basket the load now when you basket load look it's not something you want to take high in the air typically your bus look there are occasions where you do barceload it's usually if you're doing a dual lift on a heavy load or something quite often you'll see it's basketed it's not an ideal way to lift a load but sometimes it is a preferred method if it's not going to go too high and it's um you're going to worry about crushing sides or something all right so if you do basket a load essentially all it's all we're doing is getting our sling and go straight under it like that all right and the basically go straight up like that all right now people will tell you when you basket a round load you'll double the opacity of the sling now that's correct but keep in mind the load has to be more than 10 times the diameter of the sling if this wasn't 10 times diameter of that then what's going to happen is going to point load it and it takes out the effect of that doubling of the sling now also when you're doubling it that's only if it's those things going straight up so if you've got a Rams Horn hook for example you might get one on each side of it and it's just straight down if there's an angle in those slings then you'll double the sling but then you've got to take into account the angle Factor as well all right so these are your three main ways of seeing your load and some of the effects on these things themselves right if you have any questions just leave it in the comments below and I'll try and get back to you all right thanks for your time

Channel: Kieran's Crane, Rigging and Construction Training

Views: 3,288

Keywords: Rigging, Dogging course, Dogging training, How to, Kierans training, Plate clamps, Scaffold, Slinging, Steel plate, Training, crane hand signals, crane machine, doggers, loads, slinger signaller, slinging loads, Slinging methods, Rigging methods, rigging and lifting questions and answers, rigging terms, rigging course, basket hitch, chain slings, synthetic sling, plate clamps, kierans training

Id: zVtHLbRfmCE

Length: 9min 55sec (595 seconds)

Published: Thu Jul 27 2023