Tdaaaaaa!
I think Inspector has it but I'd suggest a couple of options.
I do a bit of hauling at work. We use our abseil equipment (often reversed from normal way). So instead of using a descender to come down a rope, you can introduce a pulley or two, a grab device as a brake and you have a 3:1 or 6:1 hauling system. It can get quite inventive. With a couple of guys you can lift a load, carry it across space and drop it precisely. ... Anyway for your purpose most of that is redundant but a few tips might carry across, forgive the pun.
Web slings have sewn eyes and are normally quite stiff to work with. These are the type you see cranes using. Colours denote weight loads most far higher than you will approach exceeding. WLL = Working Load Limit.
Personally I'd use
round slings. These are a continuous loop. They are more versatile for your needs. You can choke them in the same way but in more ways and they are also more pliable and easier to use. If you need to shorten one just a bit you can just tie a couple of knots in it.
Strikes me that you have a very limited amount of(vertical) spare space/height to work in so you need to have as an adaptable system as possible. Round slings will suit this. A couple of inches might make all the difference on occasion. As the Actress said to the Bishop.
https://www.tecni.uk/lifting-safety-equ ... und-slings
Have a look and try and work out the optimal length of the slings you will need for your tasks.
I'd get a few karabiners. Klickety Klick.
Easy to use. Again, these suit round slings not web slings. Get screwgate steel ones. Nowt fancy. Most krabs will take 5-8kN
Along The Axis. Screwing them up is good practice and safe but doesn't make them stronger. Don't load across the gate. Also don't tighten the screws when they are loaded or you will never unscrew them if you unload the weight.
If you are really trying to save space, or for permanent fixings get maillon rapides. If you do, you HAVE to screw them up, preferably with a spanner, open they will bend under my weight (10ish stone) Pita if you have to repair a door. Little more of a problem if you are 18 floors up swinging about on a 10mm rope. DAMHIKT because I will have to lie. :| Really. :shock:
I would also look at getting some smaller round slings. Climbing ones, maybe 50 cm ones. Versatility is everything. But it also strikes me that a lot of your loads are going to be cramped up Coley like your door there. So it gives you a bit of a headache.
You either go one middle sling and balance. Not for me. But, you pays your money you takes your chances, it's wood not a person hanging there. I look at all this from a different perspective out of habit.
But cramps will interfere with using 2 slings from a central lifting point sometimes.
One more option is to introduce a lifting beam. Just a length of box steel or scaff bar for example and rig your load off two points.
I'd get them little thin climbing slings and wrap them round the bar being careful to kind of get them to loop round itself keeping it all flat to the surface of the bar. If you can get it tight enough to
just get your karabiners in that's perfect. It means your slings won't slip. That means if you haven't loaded your bar centrally everything will stay on the bar. It might be a pit p*ssed but it will be safe and not slip off. You can move everything about for different lifts. That central bar doesn't need to be long, just gives you a straight vertical rig to avoid cramps. All about the options.
https://www.abaris.co.uk/prod/anchor-st ... -Sling.htm
https://www.abaris.co.uk/cat/karabiners-connectors
(for info: All this gear will have a weight rating on it. The link above has a breaking load of 30kN. Some times its WLL sometimes its Safe Working Load. It's guaranteed to that. kN is a force so technically this will lift 299kg then break. But that's nonsense. End of the day this will be load sharing with 2 anchors because there's one at either end. so these should hold up to 600kg in the air. You're covered.
(One last bore on bit. Loler is the HSE bit that deals with lifting operations and lifting equipment regulations.
Bear with me here. It's nearly over.
The most important single part of the legislation is (arguably) that it DEMANDS regular inspection. I know they didn't write the legislation with your shed in mind but...
Just saying Coley. Keep an eye on it. And keep keeping an eye on it every once in a while.)
Errrrrr... what else? You can buy special edge protectors for stuff you are lifting. Don't. Use some carpet offcuts if you find you need to.
Proper carpet mind, not that rubber backed s***e, pop in your local fitters they will throw it at you. Don't think you will need it mate tbh.
Tell you what Coley, I'll have a dig about in the shed mate. I definitely have some Krabs spare pm your address and they are yours.
If you're still reading I'll be amazed.
All the best
Chris