messing about in boats

Fixing The Broken Crossbeam

Posted in Boat Building & Maintenance by Joseph Moore on April 13, 2010

Last time she went aground the rudder lifted off the bottom two pintles, sheared off the top pintle and split the crossbeam along the grain. A pretty easy fix as it’s usually a fairly low-stress area considering the size of the beam. Just bog the broken sections back on with some strong microfibres mix. The reinforcing bar on the underside was also coming adrift, which I think was more to do with old glue than stress so I’ve prised it off and filleted it back on with some more bog.

A couple of snaps of the broken beam and the hardware I removed:

Transom crossbeam, split along the grain

Transom crossbeam, split along the grain

Hardware removed from the beam - note the sheared pintle

Hardware removed from the beam - note the sheared pintle


So what’s bog? I’m not really sure why it’s called bog, it’s a Cherub slang term probably as people tend to call it all sorts of different things. Basically it’s epoxy resin mixed with a filler such as microballons, glass bubbles (good for fairing), or microfibres (good for strength).

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One Response

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  1. sarah said, on April 17, 2010 at 6:54 am

    Nice cat bowl :)


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