Welcome to the Forum, bertryane. Glad you're here.
About 16 months ago, I had a catamaran
surveyed that I fully expected to purchase
. I withdrew the offer, however, after the survey
revealed the vessel had received significant damage that was the result of the mast
"working" over time as the vessel completed a four-year circumnavigation
. The vessel had a structural SS bimini
support / traveler attachment point.
Over the course of the couple's voyage around the world, they had had to have broken welds in the structure re-welded from time-to-time. They always suspected that the dinghy davits
suspended from the aft end of the structure were the source of the stresses that caused the cracks. That is, probably, at least partially true, but the surveyor
and I concluded that it could not have been responsible for the other damage that manifested elsewhere.
step had evidence of significant cracking, and the extent of the cracking had gotten worse over time, as someone had noted it and dated the then-extent of the largest crack more than two years earlier, and the cracking we saw was well-beyond that point.
Here's what the surveyor
and I concluded had been happening:
The constant motion aboard a world-cruising vessel is virtually unrelieved, and since the boat and vessel are two separate, vitally important, components of what should be a unitary system, unwanted problems can occur if these components are moving independently. In the final analysis, it appeared that the stresses applied to the mast had been transmitted down through the traveler and the backstays
, through the SS bimini support structure and into the fiberglass
structure of the vessel.
In addition to the significant cracking of the mast step and the broken welds in the SS structure, there was delamination
and cracking of the 'glass at the points where the SS structure was attached to the 'glass structure. At the time of the survey
, there were numerous hairline cracks evident in the SS structure that were entirely unrelated to the dinghy davits
All-in-all, it was enough to convince me that it was an ongoing problem that I would have to monitor
closely, and probably spend money
on constantly. But most concerning to me was the potential for catastrophic failure at some point.
None of the above may apply to what you're contemplating, but I did want to pass along my experience with one particular example of one particular brand of catamaran
(Wildcat 35). Certainly what you're thinking of doing has been done countless times without any problems, so don't let my experience be anything more than a single
Best of luck to you in making your vessel the perfect one for you.