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Old 06-06-2022, 06:16 PM   #1
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1977 21' Globetrotter
Edmonton , AB
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Repairing damaged rib

Hi there I am restoring a 1977 Land Yacht.

Unfortunately a tree fell on the front curbside corner. I have a new panel on the way to replace the damaged one. Now that I have the interior skin off I see that the front most rib has also been damaged. Around a 2 foot section of it is pretty bent and there is a crack in it as well.

My plan is to fabricate a section of rib out of two pieces of 1.5" Aluminum angle welded together, cut out the damaged section and then use buck rivets to join the new section to the rib.

The question I have is whether or not this will give me the structural integrity that I need. By the time I join the new piece to the remaining rib and rivet the outer and inner skin to the rib I think that it will be very strong but I would really appreciate the experience of any other members.

I have the front upper skin section off but taking off the lower sections of inner skin in order to replace the entire rib would be a major complication to my plans.
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Old 06-06-2022, 07:41 PM   #2
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Can you post a picture? The ribs are pretty soft and easily reformed.

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Old 06-06-2022, 07:55 PM   #3
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1977 21' Globetrotter
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Photos of rib damage

Hey there thanks for your response. I think I have attached photos although the website is not all that intuitive
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Old 06-06-2022, 08:19 PM   #4
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As long as you pick-up sufficient over-lap of undamaged area of the rib you should be fine. To do this invisibly may require a doubler at the point where the new piece meets the old.
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Old 06-07-2022, 05:08 PM   #5
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Remove both skins so the damaged rib stands alone with nothing attached to it around the damaged area. Reform as necessary and as stated above rivet doublers to the broken areas. If you know someone with a Tig welder that knows how to use it then the cracks can be welded up. Not sure on the alloy but it is weldable. Probably 3003 or 5052.

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