Lifting Beams

Closest thing I have done to this sort of exercise was put a R28 Pratt & Whitney 18 cylinder on a Convair.

Don't really know how you would do this as a practical matter, unless you had stud bolts either out the beam to the receiver holes, or stud bolts out the beam to drop to.

Did your teacher say you could put nuts on the bolts by hand?

Is your teacher fond of block and tackle, or chainfalls?

Nope, No chains and tackles.

Do you mean one of these or similar?

http://www.tandemloc.com/0_lifting/L_N31000A.asp

very nice.

thanks woodygb,

but I didnt understand how the bayonets are locked.

the teacher told us suppose the containers are put on top of each other and there is no possibility for a worker to go on top and tighten the bolts. No nuts also.

there are only 8 oval holes around the container.

I have seen some robotic (but the crains are electrically operated) documentary in the discovery channel, where the hooks are located by the container (might have been some laser or so for the accuracy) and then as the hook is lowered, the arms are tripped as soon as it touches the tank and the hooks spring back to lock. It was some thing like the safety razors tupe concept where the razor tongues lock by the trip arm as it is pushed on the blade at a certain location.

It was quite a few months back, and If I am not wrong it was in the megastructures series on a new port in china.