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Old 02-01-2012, 14:13   #1
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Raising and Lowering Your Mast | easier than you think

So the loose factory conduit clanging around inside my mast finally drove me to do something about it. I did some research online and found this great diagram attached to this post. Seemed simple enough, so with a few tweaks for my slightly larger mast I decided to give it a go.

-I used 2 12' 2x6s for each leg and secured the foot of each leg by drilling 2 holes near each foot and then firmly tying 8mm line through the holes and to the toe rail.
-We lifted the a-frame using the jib halyard
-The rear supporting lines were led back from the legs through a block and onto the jib sheet winches. This allowed for good adjustment of front to back positioning of the a frame as well as tensioning.
-The front support line was run through a racheting pulley on the anchor cleat, also to allow for easy adjustment and tensioning.
-The working end of the lifting line was rigged through a 3:1 system using a gri-gri (self locking lowering device used in rock climbing)

The process was quite easy once everything was thought out and setup. I was intimidated, but now having done it, I would highly recommended it if you are considering it.

Video clip here: http://highexposures.com/mastraise3.mov



Oh ya, for the new conduit I went the route of riveting PVC to the interior of the mast. It was pretty simple once I saw how it was done: 2 holes are drilled at the same height on the mast (so on its side, they are above and below each other). One hole is used to insert a hook made from metal wire which pulls the PVC tight so you can drill it then rivet it. Plug the blank hole with a rivet.

Cheers
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Old 02-01-2012, 17:20   #2
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Re: Raising and Lowering Your Mast | easier than you think

Helluva A frame

If boat has a tabernacle can use a smaller A frame towards the bow. This is a sister ship of mine (it's a ketch). She was in Holland - masts dropped for the inland bridges (albeit not something done for every bridge!):-





Been a long time since I dropped a mast onto the deck like that (and a bit smaller) - but as you say, the key is things being thought out and set up
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Old 02-01-2012, 17:54   #3
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Re: Raising and Lowering Your Mast | easier than you think

Nice. In my research I found lots of info about tabernacles and hinged mast steps and all that, but not much about a plain-jane deck stepped mast.

Tabernacles sure look convenient!
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Old 02-01-2012, 18:11   #4
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Re: Raising and Lowering Your Mast | easier than you think

How tall was your mast?? Thinking of doing this with my 40' mast so assume I'll need longer shear legs.
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Old 02-01-2012, 18:45   #5
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Re: Raising and Lowering Your Mast | easier than you think

Rover - my mast is about 37'. The lifting line attached to the mast right below the spreaders which was a bit below the center of gravity for the mast. Just run the trig to figure out your specific triangle.

The 2x6 legs did have noticeable flex - nothing that made me think they would collapse or break, but I would consider attaching 2x4's on edge on the outside of the 2x6's for a bit more rigidity next time.
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Old 02-01-2012, 23:22   #6
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Re: Raising and Lowering Your Mast | easier than you think

Mahalo for the information. Will use a 20' 2x6 with 2x4 stiffeners. What's this trig stuff you're talking about???? That have anything to do with breakfast cereal. No, that's Trix.
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