
05-14-2011
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Junior Member
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Join Date: Apr 2011
Posts: 14
Rep Power: 0
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Sagging Cabin Sole / Dish in cabin top
I found that there was a little sagging (1/8") apparent of the cabin top at the mast step. We destepped the mast and removed the compression post. The compression post step was on the cabin sole, and this was supported underneath by a block of wood covered with fibreglass, with a V shape at the bottom which sat in the V of the hull. There was some bedding compound where the block of wood contacted the hull / keel area.
The bedding compound had crumbled, and the plywood in the cabin sole had compressed. We then jacked up the cabin top with a 2x4 and jack to return it to its former position and judged by the shape of the curved sides and flatness of the mast step. We raised it more like 1/2", not the apparent 1/8" of compression that was apparent. Now the cabin top looks like it is the original shape.
We pulled the block out and tore it apart in the process. The wood was dry. We reinforced the area under the block and made it flat with fibreglass, and then a teak block was installed on top of the flat surface. The compression post was then installed on top of the teak block.
Unfortunately, I split the teak compression post when I was installing the 3/8" lag bolt which connects the compression post to the mast step. The post did not seem dry rotted or anything. Strange. Looking for a piece of teak now to build a new compression post.
My main message is that a small amount of cabin top compression visible may actually be more than it appears. That sole compresses and so does the old bedding agent under the compression block under the sole.
PS - We had to cut out a rectangular hole under the compression post in order to get the old block out.
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