Mast compression - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 01-26-2003
Senior Member
 
Join Date: Jan 2002
Posts: 217
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
KenD is on a distinguished road
Mast compression

I looked at a boat today and noticed cracking in the overhead around the support pole for the mast. What is the best way to fix this and is it cost effective to fix it if the boat was the right price? Somebody told me they jacked up the overhead and slipped out the pole, then mixed some pour-rock in a plastic 20 oz. bottle, inserted it in the hole through the deck to the bilge, then inserted the pole in and held it up until it hardened. The factory had originally placed a piece of teak about 1 1/2" thick x 2 1/2" x 4" long under the pole. The teak piece that came out was compressed to within 1/2" of the total thickness causing the mast to compress onto the coach roof. Is this a safe fix?

KenD
Reply With Quote Share with Facebook
  #2  
Old 01-26-2003
pirateofcapeann's Avatar
Senior Member
 
Join Date: Aug 2002
Location: Gloucester, Mass. USA
Posts: 373
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 13
pirateofcapeann is on a distinguished road
Mast compression

Ken:

If thereís visible cracking below, then Iíd suggest that thereís compromised materials right up through the support beam and core, clean through to the mast step. No shoring you do from below will stop the mast from sagging into the deck. The high compression loads exerted on the mast step area dictate that any fix here be strong and first-rate.

There are a few different ways to go about this but I think the simplest and strongest is to laminate a beam under the mast step to spread the loads to un-compromised areas of the deck. You could make another to do the same thing on top of the support pole to completely bridge the week area from below too. Donít forget to inspect the support for the poleís base!

I have made a similar fix to this aboard my C22 and while I have already gone into detail in another topic, I could give you more specifics should you think youíd like to explore this option further.


Pi
Reply With Quote Share with Facebook
  #3  
Old 01-27-2003
Senior Member
 
Join Date: Jan 2002
Posts: 217
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
KenD is on a distinguished road
Mast compression

Thanks I think? I considered buying this boat until I saw the cracked glass and compressed bulkhead, the owner told me what he did to (fix) the problem. I was concerned about the glass under the mast step and how strong the section would be sounds like he sort of fixed some of the problem but not the expensive part I think the repair you suggest may be a bit out of my idea of an adventure in repair. Have any idea what it would cost to fix properly?
Reply With Quote Share with Facebook
  #4  
Old 01-27-2003
Member
 
Join Date: May 2002
Posts: 44
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
ikent is on a distinguished road
Mast compression

I replaced the mast step on my boat (Celestial 48) a few months ago. I have a keel stepped mast and the support under the step was 1/8" glass over wood. Water had run down the mast and over time had gotten to the wood causing it to soften and compress. I removed the mast and removed/ground out the old step support. (A messy job but I needed to save $) Then I had a professional build a form and pour a base of fiber reinforced epoxy. This took several pours as the volume about a cubic foot. (Hence the pro) On top of this went a 1" plate of G10 to which the mast step itself was affixed.
Total cost about $1000 for materials and labor. This was probably overkill but it''s a data point for you.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Deck stepped Mast-Always Bad ? Mrs Mutiny Boat Review and Purchase Forum 24 10-05-2009 07:55 PM
which 38ft boat? bluewaterdreamer Boat Review and Purchase Forum 10 10-03-2007 12:54 PM
30ft Catalina BigRuss Boat Review and Purchase Forum 3 09-09-2006 05:33 PM
what mast? jrwright Boat Review and Purchase Forum 3 03-14-2004 08:19 PM
Is one better than the other? gandydancer Gear & Maintenance 7 07-11-2002 06:08 PM


All times are GMT -4. The time now is 11:48 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.