Swing out lifting gantry?

[Park_monkey]

Hello all.
I have acquired a chain block and tackle and am wondering whether to use it or just sell it on.
I was wondering about building two a frames with a bar between so I can use it to lift engines out and tip shells up to work underneath. Problem is i don't have a lot of room so I was thinking about building a frame with an arm that swings out in a semi circle with a sliding mount for the block and tackle so I could lift out an engine and swing it over to the bench.
It's only a prefab garage so the walls aren't strong enough to mount it to so it would have to support its own weight.
Can anyone suggest any designs or shall I ditch it and get an engine hoist?
Cheers

 

[madkayaker]

If it's not a high prefab garage I bet you will run out of head room with a chain block

 

[Park_monkey]

I have just raised the roof on it so there is a good bit of headroom now.
I think what I'm talking about is a jib! It's only a 0.5t block and tackle so I don't need anything too big.

 

[madkayaker]

What about an a frame? Swing gantry work well and are quite simple to build but not sure how to start spacing steel etc (will watch closely as I have had this idea could of times)

 

[Park_monkey]

Something like this-
http://www.ebay.co.uk/itm/125kg-Jib..._Lifting_Moving_Equipment&hash=item4ace861236

 

[madkayaker]

Yep that's the thing

 

[Park_monkey]

That would be awesome, I was thinking more a tube that can rotate inside a larger tube welded to a thick steel plate bolted to the floor. The smaller tube would protrude from the top and have steel box section welded to it with another piece to make a long triangle. Then make a mount for the b&t to hang from with castors so it can roll along the beam.

 

[the snooper]

you would need good strong concrete to bolt it to and it would need to be a decent thickness

 

[Park_monkey]

The concrete is a good 6 inches so should be ok.

 

[Park_monkey]

Can anyone suggest some dimensions for a crane like the one pictured above in the eBay link? Will be around 3m total height with an arm around 2.5m. The chain block and tackle I have is rated at 0.5t. Alternatively can anyone explain how to do the calculations so I could work it out myself?