James, When I rebuilt Calypso’s deck around the mast collar I used a combo of G10 (1/4” thick) and layers of glass/epoxy in the places where the halyard blocks are located. In general this extended out from the mast collar 18”. I went back to using new balsa core as I moved outward and there were no penetrations through the laminate.
Calypso, built by Bruckmann’s crew in 1970/71 originally had plywood out aprox. 12” then went to balsa. I found the plywood saturated but still had some structural integrity, but not enough to be trusted. Bruckmann’s also ran un-tinned copper “zip” cord along side the balsa (between the glass inner and outer deck laminate) for interior lights. The zip cord made a water runway to extent balsa rot for and aft. BTW, I ran several multi week “dry the balsa” experiments. If the balsa surface is not substantially exposed to the air, the drying seem to be very localized, not extending deeper than ½” into the deck laminate. YMMV. Martin DeYoung Calypso 1971 C&C 43 Seattle/Port Ludlow (soon to be in Port Townsend’s yard for paint) From: James Bibb via CnC-List<mailto:[email protected]> Sent: Tuesday, April 20, 2021 10:07 AM To: Chuck S via CnC-List<mailto:[email protected]> Cc: James Bibb<mailto:[email protected]> Subject: Stus-List C&D 34-36R deck repair Chuck and I have been going over deck repair information…thought it’d be best to get this stuff back on the site where everyone can reference it. Chuck, thanks for the valuable feedback… Balsa core was the deck core material…I’ve had to remove a large portion of the deck around the mast hardware locations…original construction didn’t detail the through deck penetrations very well. I’m waiting for the deck to dry before rebuild. I’ve ordered balsa to go back in…however propose to put marine plywood or comparable material at hardware mount points and around the mast ring. Was that your strategy? James Bibb C&C SV Darwin’s folly 1991 34-36R Thanks to all of the subscribers that contributed to the list to help with the costs involved. If you want to show your support to the list - use PayPal to send contribution -- https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.paypal.me%2Fstumurray&data=04%7C01%7C%7Cd35ce02ccace41bc1ba508d9041ed32b%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637545352696744107%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3APpe%2BL535F%2FDVISIRSiD%2FLXH4p9O61Hmld%2FhMyG%2B3k%3D&reserved=0 Thanks - Stu
Thanks to all of the subscribers that contributed to the list to help with the costs involved. If you want to show your support to the list - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu
