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Mast Beam Repair


On a number of occasions, prospective owners have asked me what is the weakness of an Alberg 30. Well, there are some minor things that should be fixed (and probably already have been, on most boat). The two that come to mind are the home-made 3/4" through-hulls that Whitby made, and the fact that the chainplate bolts are not as strong as the rigging. These are easily remedied.

Other than that, it's a good, sturdy boat. As with any boat, it's a compromise, of course, so some people will be dissatisfied with some aspect or other. And, as with any boat, things wear out. One of those things that wears out on the older boats is the laminated wood beam that supports the mast step. This often scares new owners, but it shouldn't. It's not that hard to fix.

When the beams first started failing on racing boats with a lot of tension on the rigging, Bob Marshall came up with a rolled aluminum beam to sister the wooden beam. Not a bad try, but not quite adequate in most cases. Bruce Rankin, an engineering professor at the Naval Academy, designed a better fix. This was a pair of aluminum plates, sistered on each side of the beam. I don't know of a single case where this has failed.

You can find some descriptions of this repair in the collaborate section and Randy Katz has written up his repair to Simple Gifts. Also see Jeff Fongemie's repair of SeaGrass I hope that these descriptions help demystify the procedure for you.




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