What is a Mast Base Support Block?

Status
Not open for further replies.
Dec 3, 2003
14
Catalina 30 6205 mobile
Bout a month ago I asked about how to upstep my mast. This is why. While having my rig tuned I heard a pop. The rigger said it was the rig settling and not to worry. That was the wrong answer. I got nosey and found a rotton support block behind some warped fiberglas in the forward section of the bilge. While looking at that I noticed that a crack had formed in the overhead at the compression post. WOW! Although Frank did call me himself, it has taken four weeks to get any help from Catalina on the subject. Finally, they found an original mast base support block, for $85.00 +s/h, which I have chosen not to use. The reason is that the block would require tons of trimming before I could use it. Ask me later how they install the damn thing. What I have before me is a space with a very small footprint for which I am making a truss out of 1/4" stainless steel flatbar. I have the drawing out later on my site. The truss will be bolted and epoxied in place and the deck is about to get a series of epoxy and high density vitimins. Hopefully this will make her feel better. See what happens when you go back to school and hardly sail for two years?
 
Jun 17, 2004
4
- - Dana Point
Wow!

Not to diminish the task ahead, but this is the reason I'm a fanatic about keeping my bilges dry. Good luck with the repair.
 
Jun 4, 2004
16
- - Redwood City
Hairline cracks in support beam

My support block is still solid, but I have about 1/4 inch depression at the mast step and several very thin hairline cracks in the mast support beam. I had the mast pulled and inspected when i purchased the boat and the yard said not a problem and if they fixed the hairline cracks they would just reappear. Do others have the same issue- boat is an 85 that was sailed in SF Bay by PO.
 
Jul 7, 2004
4
- - Solomons Island, Maryland
Concrete in the Bilge

I have an 82 Catalina 30 with a simuliar problem. I found water pooling around the mast after a rain storm and investegated. Found the compression post (ie..support block of wood) rotten. Removed the mast and tried the same path with a 8"x8" block of pressure treated. Way to much trimming and the shower drain was in the way. Found some stuff called fibercrete in Lowe's for $2.60 60lb bag (sidewalks are poured with this). Made a dam (out of plywood) that configures to the shape of the bilge right in front of the first keel bolt. Cleaned out the rotten portion of the support block under the compression post. Mixed concrete and poured. Installed shims for the little bit of space between the fiberecrete and flooring. Compression post has not moved, cracked or otherwise. As a matter of fact the concrete is getting harder as it sits in bilge water. Be sure to install a piece of PVC on the bottom of the bilge so that any water in front of the compession block will drain through. Also, replace the shower drain hose, if it drains in the bilge at this time. Hopes this helps, worked great for me.
 
Jun 6, 2004
15
- - LGNY
Rotten block

My bloch was rotten but when I riped it out I found that the bottom of the block was teak and It was still good but when they made my boat they forgot to seal the drain in the bottom of the shower pan and I rotted from the top down .thjey must of made my boat on friday.I used Iron wood planks 3/4" thick and built them up from the bottom cuting them one plank at a time to fit the bilge then glueing them up with wests epoxy and a peace of glass mesh between the boards .and sliping them in the bilge in two peaces top and bottom the top peace had the wire pipe in it as one unit and I cut aplank the wright with to fit between the top and bottom peaces and hammered it in . Nasty job. John
 
Dec 3, 2003
14
Catalina 30 6205 mobile
Hey Steve R

You've got to be kidding. Concrete? Wow! Have you got any pictures? I love to see that repair. Thanks Kevin
 
Jul 7, 2004
4
- - Solomons Island, Maryland
Concrete in bilge

I don't have any pictures as of yet. I'll borrow the wife's digital camera and see what I can do.I cleaned the rotten wood out enough to were the concrete supported the compression post, At least 2 inch's on all sides. After trying to cut the wood piece and all the trimming, I said there's got to be a better way. I was intially going to use fiberglass and continue builing it up, but that would take way to much time. Had a schedule to keep to get the boat in the water for the spring. If the bilge stays wet, so be it. Concrete likes water, even if it is salt water.
 
Status
Not open for further replies.