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 Catalina/Capri 25/250 Sailor's Forums
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 Shroud failure
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bmcgucke
Deckhand

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9 Posts

Initially Posted - 04/30/2005 :  00:24:53  Show Profile
All,
the Marina just called and said one of my Port shrouds has snapped. Is there significant danger of the mast falling with a single shroud broken? It will be a day or two before I can inspect the damage, I just don't want to have the mast topple onto someone else's boat. Thanks.

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Ben - FL
Admiral

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880 Posts

Response Posted - 04/30/2005 :  05:45:52  Show Profile  Visit Ben - FL's Homepage
I went out to my boat once to find a shroud had apparently unscrewed itself from the wind vibrating the turnbuckle. But the mast was still up. Don't know how long it was that way but could have been two weeks.

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bear
Admiral

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USA
909 Posts

Response Posted - 04/30/2005 :  08:23:36  Show Profile
I would take the baby shrouds with me and install them or use a halyard tied down to a stantion on the port side just to be safe, while you inspect the shroud. It would give you piece of mind while you figure out what happened. "Bear" Splash in 7 days in upstate N.Y.

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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 04/30/2005 :  09:53:29  Show Profile  Visit Frank Hopper's Homepage
Call the marina and ask them to run a halyard to the weak side so you will not worry until you get there. Are you where traffic could have snagged it? It sounds bizarre to me.

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bmcgucke
Deckhand

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9 Posts

Response Posted - 04/30/2005 :  20:36:08  Show Profile
I inspected the shroud today and it was intact. The pin at the bottom of the turnbuckle sheared off. The mast step pin had somehow worked its self loose and was half out of its hole. The wing nut and washer were on deck. I re-engaged the pin and tightened down the washer and nut. It was the lower port shroud, so I ran the halyard to that side as you guys suggested until I get a new T-Pin and turnbuckle, which I lost to Davy Jones Locker when I unscrewed it from the shroud. Thanks for your help and suggestions all.

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Arlyn Stewart
Master Marine Consultant

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USA
2980 Posts

Response Posted - 05/01/2005 :  08:54:13  Show Profile  Visit Arlyn Stewart's Homepage
The mast step bolt would benefit from either a locking nut or better yet, drill the bolt end for a cotter pin or circle clip. The hole would require drilling on a drill press however. Stainless is difficult to drill with a hand drill as it work hardens with heat buildup as there is not enough leverage to keep the bit cutting and advancing. The bit needs to be sharp and cutting fluid used to avoid heat.

Was the T bolt bent during a mast raising and overstressed? The T clevis is subject to binding on the chain plate U bolt during mast raising. It will lay horizontally and as the shroud firms up, the clevis will bind and bend the T bolt. This can be avoided by using large size plastic ties running them through each of the two clevis to marry them together in a vertical position. The ties are not UV resistant and will need covered by rigging tape.

This is must do rigging for anyone trailering regularly.


Edited by - Arlyn Stewart on 05/01/2005 09:01:10
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bmcgucke
Deckhand

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9 Posts

Response Posted - 05/02/2005 :  11:17:59  Show Profile
Thanks Arlyn,
I am not sure why the T bolt failed. The mast had only been raised on initial launch about 5 years ago. I had not inspected the rigging carefully since Hurricane Ivan came through in Sept, so I am not sure if that may have contributed to the failure. I hope to have a replacement T bolt and turnbuckle in the next couple of weeks.

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Bay Tripper
1st Mate

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USA
56 Posts

Response Posted - 05/06/2005 :  21:33:29  Show Profile
I just launched my boat and found the T bolts bent. Please tell us where and what you purchase to replace your T bolts.

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Arlyn Stewart
Master Marine Consultant

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USA
2980 Posts

Response Posted - 05/07/2005 :  08:09:39  Show Profile  Visit Arlyn Stewart's Homepage
The T bolts can be found at West Marine... they have a left handed thread.

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