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post #1 of 8 Old 08-30-2013 Thread Starter
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spreader bolt mast issue

Forward bolt on spreader has pulled out of mast and started a tear in the aluminum. Evidence of some stress on the other bolt holes as well. Any ideas or suggestions from anyone who has observed similar would be greatly appreciated. One suggestion from local marina was to machine an aluminum spreader bracket to replace the stainless and welt it directly to the mast.
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post #2 of 8 Old 08-30-2013
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Re: spreader bolt mast issue

I would think that's pretty serious and needs immediate attention, I'll be interested to read some suggestions...
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post #3 of 8 Old 08-30-2013
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Re: spreader bolt mast issue

I'll be interested in hearing about this, too. It is curious that it is being held by 2 screws and 1 bolt.


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post #4 of 8 Old 08-30-2013
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Re: spreader bolt mast issue

DO SOMETHING! If you don't, your mast is about to get very noticably shorter.
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post #5 of 8 Old 08-30-2013
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Re: spreader bolt mast issue

Anything causing unusual forces or stress on the shrouds & spreaders?

Barring a new mast, could you make a boot or collar to wrap around the mast to reinforce it, attach spreaders to boot? Like this:
Split Steel Conduit

This would be *temporary*, but better than nothing. I'd be worrying about the mast failing at the bolt line.

The mast needs to be reinforced at spreader attachment points, and probably other attachments.
Can they saw the mast in half at the failure and install a reinforcing sleeve, then put it back together? An extra pound or two aloft is better than having the whole rig come down on your head.

Do you have spreader support lines? They attach about halfway between mast & spreader tip, attach to mast at about 45-degree angle, distribute loads & keep spreaders from drooping.

Good luck.

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post #6 of 8 Old 08-30-2013
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Re: spreader bolt mast issue

You may wish to replace the two spreader brackets with a SS collar and continuous spreader. Check with rig manufacturer. These failures are common and often the spar maker has developed a retrofit.
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post #7 of 8 Old 08-30-2013
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Re: spreader bolt mast issue

Quote:
Originally Posted by Hudsonian View Post
You may wish to replace the two spreader brackets with a SS collar and continuous spreader. Check with rig manufacturer. These failures are common and often the spar maker has developed a retrofit.
continuous spreader is the best solution.
The mast can be reinforced by riveting curved plates on both sides of the mast. No need to cut the mast into two pieces first, most probably you will have a hard time to find a profile that will fit inside the mast.

Have a look at this thread Cracked Mast at Spreader - SparTalk
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Re: spreader bolt mast issue

Older posts on the subject: repairing cracked mast with welding
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