I have a detached double garage, which was built about 6 years ago by
McAlpine.

I want to rig up a 'chain block' to do some lifting.. I am only
planning to lift a max of 200kgs and wonder if my joists will take this
kind of load.

The plan I had was to put a bar along a number of joists (Probably 4),
to spread the load a little.

Would this be safe?

Jon