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post #1 of 7 Old 03-01-2012 Thread Starter
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Mast Stepping Double Spreader Rig?

Forgive my ignorance, but I'm having a hard time figuring out how you would step a double spreader mast using a jib crane?
More specifically, how do you rig the sling so as to not get it stuck between the set of spreaders?
Any input would be appreciated...
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Originally Posted by krazykoozak View Post
Forgive my ignorance, but I'm having a hard time figuring out how you would step a double spreader mast using a jib crane?
More specifically, how do you rig the sling so as to not get it stuck between the set of spreaders?
Any input would be appreciated...
The way I always do it is to have a man go aloft riding the sling and carrying the "down line". The man steps out of the sling onto the lower spreaders and the hook is lowered to where he can unhook one side of the sling, wrap it around the mast and hook it up again.
The hook is raised and the "down line" is middled on the sling.
The man then slides down the mast holding both parts of the down line.
The down line is secured around either the winches or gooseneck.
The mast is pulled.
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post #3 of 7 Old 03-01-2012 Thread Starter
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Thanks for the info. Does the opposite apply as well when hoisting the mast? Is there a way to rig it so that it isn't neccessary for someone to go up the rig to get the sling off?
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Originally Posted by krazykoozak View Post
Thanks for the info. Does the opposite apply as well when hoisting the mast? Is there a way to rig it so that it isn't neccessary for someone to go up the rig to get the sling off?
The sling that I use is long enough that we can usually lower the hook enough to reach it from the deck. Sometimes we have to stand on a winch.
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Thanks for the info!
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post #6 of 7 Old 03-02-2012
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Attach a line (as a downhaul) to the sling before you attach it to the mast. Then just pull on the downhaul line to bring the sling down when your done.
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Originally Posted by JimsCAL View Post
Attach a line (as a downhaul) to the sling before you attach it to the mast. Then just pull on the downhaul line to bring the sling down when your done.
The issue is that the sling can only come down as far as the lower spreaders allow it to. That's why I use a very long sling.
On most boats, we can reach the hook with the sling still over the lower spreaders. We unhook one side of the sling and then the crane pulls the sling back up till it comes off the spreader.

You usually don't need to pull it down, it comes down on it's own unless it hangs up on a steaming light or something. That's why it's a good idea to trap at least one halyard under the sling to release it in case it does hang up.
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