Before I get into my comments, I'll give you a little background. I'm a mechanical engineer, and have spent nearly all of 25+ years of my career doing structural analysis on aircraft. Comments: 1)I haven 't run any numbers, but, 2) Yikes! 3) Frank Butler is pretty good at this stuff, and gave some thought as to how the deck-stepped mast loads would be reacted into the hull. Your previous PO has completely short circuited that. 4) I absolutely would not sail this boat with this bulkhead configuration. 5) I would be iffy about motoring in any conditions that approach "snotty".
My $0.02. Keith Sneddon From: [email protected] [mailto:[email protected]] On Behalf Of Jay Ducote Sent: Saturday, June 19, 2010 8:57 PM To: [email protected] Subject: Re: [IC27A] c27 bulkhead [2 Attachments] [Attachment(s) from Jay Ducote included below] If those pictures aren't visible to you, then check the attachments on this email. Thanks. On Sat, Jun 19, 2010 at 7:54 PM, Jay Ducote <[email protected]<mailto:[email protected]>> wrote: Here is the best picture I could get to immediately. The shelves on the left side of the picture are built into what is left of the bulkheads. This is on the standard interior format of a Cat27. The head is in a compartment underneath the desk with a laptop sitting on it. You can barely see the center post on the far left. The decorations are not mine, they belong to the previous owner who did modifications to live aboard but I'm trying to get her ready to sail. I would guess that the chainplates are still bolted to what is left of the bulkheads, but I'll have to check on that. Error! Filename not specified. I believe the port side is pretty similar to this as far as the size of the bulkheads (cabinets to far right, center post is again barely visible on the right. Error! Filename not specified. I'm a fairly big guy (280 lbs) and I haven't noticed flexing of the deck when walking on it. Still, I doubt it would be too difficult to reinforce the deck if that is the biggest issue with the lack of bulkheads. I think my prime concern will be the stability of the chainplates. If they are good, then should I really have any problem? Thanks for all your responses so far! On Sat, Jun 19, 2010 at 7:20 PM, <[email protected]<mailto:[email protected]>> wrote: One way to find out is the following: There is a spray on material that is used on material to show when materials flex. It is sprayed on. When the part is strained, cracks develop in proportion to the movement of the underlying material. My guess is that the spray on material would also work for this situation. I've forgotten the name of the material, but you should be able to find it on the internet, in strain products. The bulkhead spreads the load of the chainplates upward onto the underside of the deck - kind of in a triangle shape. I don't recall that the bulkheads are attached to the hull. Bob In a message dated 6/19/2010 5:13:27 P.M. US Eastern Standard Time, [email protected]<mailto:[email protected]> writes: The previous owner of the my c27 reduced the bulkheads to open up the cabin. The walls that enclose the head are no longer there. The interior is really nice, but I'm concerned about the structural integrity without the walls extending all the way to the center post. Is this going to reduce the ability to bear loads on the deck above, or should the center post and fiberglass be sufficient? What about when sailing and heeling over... will the lack of the bulkhead walls that enclose the head give me any problems there? Are there any proposed solutions to this? Thanks! -- Jay D. Ducote [email protected]<mailto:[email protected]> http://www.biteandbooze.com http://www.linkedin.com/pub/jay-ducote/20/2a2/897 225-603-4680 twitter.com/biteandbooze<http://twitter.com/biteandbooze> #BRSocMe -- Jay D. Ducote [email protected]<mailto:[email protected]> http://www.biteandbooze.com http://www.linkedin.com/pub/jay-ducote/20/2a2/897 225-603-4680 twitter.com/biteandbooze<http://twitter.com/biteandbooze> #BRSocMe ________________________________ This e-mail and any files transmitted with it may be proprietary and are intended solely for the use of the individual or entity to whom they are addressed. If you have received this e-mail in error please notify the sender. Please note that any views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of ITT Corporation. The recipient should check this e-mail and any attachments for the presence of viruses. ITT accepts no liability for any damage caused by any virus transmitted by this e-mail.
