Ribs showing through skin

[JimC]

On a welded aluminium cruising yacht, if you can tell where the ribs are because the skin has formed flats, or even gone slightly concave between them; is this a serious concern? Only applies on fwd underwater sections. Max hollow quarter inch in 2 foot run of skin measured fwd & aft between ribs.

If it is serious can you do anything about it ?

Thanks

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[hebdena]

This was quite commom on the general cargo ships I sailed on as a deck officer in my previuos career. It is pounding damage caused when bashing ones way through a head sea. I would suggest that this is normal on an aluminium hull that may have been pushed hard at times. The 'ribs' are frames.

Regards................Andrew

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[richardandtracy]

Can also be due to too much weld on the inside. The weld shrinks on either side of the frame, pulling the plate into a dented shape.

Is it a problem?
Unlikely, but it's not very pretty.

Regards

Richard.


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