Re: M_Boats: Crane launching - less scary than I thought!
The reason I ask is I have seen a boat 'pop apart' at the hull deck joint when lifted without a spreader bar. (longer cheaper boat) GO In a message dated 3/20/2009 9:51:35 A.M. US Mountain Standard Time, matt.marx@cox.net writes: Hi Gary, No, I haven't, and that's a good question. I think /hope I made the lines long enough (the hook is about head level when I'm standing in the cockpit) so that the turn over the hull-to-deck joint is shallow enough to keep the line happy, and of course use plenty of chafing protection there. That doesn't solve the problem of compression loads on the hull at that point, which are probably significant. Hmm. Something else to worry about. Matt ---- GILASAILR@aol.com wrote:
Matt, Do you use a spreader bar/frame when lifting the boat? Jerry, what is your take on this? Might not be necessary due to the relatively low weight of the boat.
Jus' wunderin' GO
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Yikes! Let's hope not. if that happens, the list here will be the 2nd to know....after the insurance company, which probably has a specific exclusion for anything that happens during lifting/ transporting/launching of the boat anyway. I am standing right next to the boat as it goes up and down, and you can bet that I'm listening for anything that sounds odd (not that I would really know what fiberglass sounds like in that moment just before it is about to explode), and I've checked all around the lift areas to see if there are any new cracks in the G-coat that might reveal excessive stress. Nothing so far. Matt On Mar 20, 2009, at 11:00 AM, GILASAILR@aol.com wrote:
The reason I ask is I have seen a boat 'pop apart' at the hull deck joint when lifted without a spreader bar. (longer cheaper boat) GO
In a message dated 3/20/2009 9:51:35 A.M. US Mountain Standard Time, matt.marx@cox.net writes:
Hi Gary,
No, I haven't, and that's a good question. I think /hope I made the lines long enough (the hook is about head level when I'm standing in the cockpit) so that the turn over the hull-to-deck joint is shallow enough to keep the line happy, and of course use plenty of chafing protection there.
That doesn't solve the problem of compression loads on the hull at that point, which are probably significant. Hmm. Something else to worry about.
Matt ---- GILASAILR@aol.com wrote:
Matt, Do you use a spreader bar/frame when lifting the boat? Jerry, what is your take on this? Might not be necessary due to the relatively low weight of the boat.
Jus' wunderin' GO
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GILASAILR＠aol.com -
Matthew Marx