Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 13-05-2019, 13:17   #1
Registered User

Join Date: Apr 2017
Location: Kansas
Boat: FP Salina 48, Hobie 33
Posts: 404
Fiberglass laminate thickness

I'm looking to build a bench seat/storage box for the cockpit on my cat. Fountaine Pajot intended to have two chairs taken from inside the boat to the cockpit. In later models they incorporated a bench seat with storage in this spot, and I'd like to replicate that.

My plan is to build it with 3/8 divinycell cored fiberglass, but I'm unsure how thick the fiberglass layup needs to be. My first thought was 1/8 inch layup on each side of the foam core, but I don't have any idea if this is overkill or not enough.

Thanks!
Tornadosailing is offline   Reply With Quote
Old 13-05-2019, 14:05   #2
Registered User
 
SailRedemption's Avatar

Join Date: Feb 2014
Location: New Orleans
Boat: Kaufman 47
Posts: 1,186
Re: Fiberglass laminate thickness

I would say, since you're using a core, that a mat, two biaxles, and a final mat would be plenty. That layup is for both sides. Overlap your corners some as well. I'm assuming you will already epoxy "mud"/bond the core together and filet before glassing.
SailRedemption is offline   Reply With Quote
Old 13-05-2019, 14:26   #3
Writing Full-Time Since 2014
 
thinwater's Avatar

Cruisers Forum Supporter

Join Date: Nov 2008
Location: Deale, MD
Boat: PDQ Altair, 32/34
Posts: 7,361
Re: Fiberglass laminate thickness

Quote:
Originally Posted by SailRedemption View Post
I would say, since you're using a core, that a mat, two biaxles, and a final mat would be plenty. That layup is for both sides. Overlap your corners some as well. I'm assuming you will already epoxy "mud"/bond the core together and filet before glassing.

Yeah, pretty much. My last boat (PDQ) was built with 2 layers of 1708 (17-ounce biax with a thin mat attached) over foam, in a mold. Without the mold, I'd put a layer of finish cloth (thin cloth) on the surface.


But you'll need to figure out the spans and bracing. Also, unidirectional is what you want to carry big cantilevered loads (you can sandwich it in).
__________________
Gear Testing--Engineering--Sailing
https://sail-delmarva.blogspot.com/
thinwater is offline   Reply With Quote
Reply

Tags
fiberglass

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fiberglass thickness bcc101 Construction, Maintenance & Refit 6 06-10-2017 19:34
Fiberglass Gellcoat and Laminate Peeling Piper'sGirl Construction, Maintenance & Refit 1 07-07-2015 19:05
Boat Hull laminate schedules and thickness Cotemar Construction, Maintenance & Refit 5 27-09-2014 13:48
how to build a thick fiberglass laminate using epoxy resin?? albergsailor Monohull Sailboats 7 18-08-2013 08:36
gluing down laminate floor schoonerdog Construction, Maintenance & Refit 9 18-03-2007 14:07

Advertise Here


All times are GMT -7. The time now is 09:51.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.