Rigging too tight - Mast compressed deck!

[Don C L]

Originally Posted by mikebikeboy

Here's another render with a 1" curve cut out from the bottom, making the center of the arch 3" x 0.5" thick

Gotta think a little bit about making it pretty!

Yeah if the steel is a half inch thick and 4 inches wide, that is very strong! Consider how much more that is than the original! Leaning the steel on it side so you have 4 inches of steel to support the load over 22" is definitely overkill. And that is good!
The arch looks nice too. I was (am) also on a tight budget with mine so fancy things like having a machine shop cut (an arch) and drill for me was something I was trying to avoid. And bending is hard to find too. The only thing about the L is as the compression is applied will the beam try to twist? I think not in this case.

[Cruiser2B]

I built a new beam and mast support system for my Alberg 30 out of G10 fiberglass board
My old blog may still be up Adventures of Salacia
Lots of photos....G10 is easy to work with...not too expensive and lasts forever.

[wingssail]

Originally Posted by mikebikeboy

Here's another render with a 1" curve cut out from the bottom, making the center of the arch 3" x 0.5" thick

Gotta think a little bit about making it pretty!

To make it pretty sand and prep the steel with epoxy, then paint white. Cut a light weight molding out of teak or other wood to match the interior.

It will be gorgeous.

[barnakiel]

Originally Posted by mikebikeboy

I'm thinking I might be forced into making a compression post rather than an arch, as the mast is not centered directly over the bulkhead:

An odd idea from the designer, to NOT align the mast foot with the bulkhead ... Is it offset like this in all boats of the series?


In our boat the mast sits exactly over the beam and the beam is 5x2 inch oak.


Placing a post there may block the passage way. You also must check if there is a matching floor member below - you cannot place the post right on the bottom laminations, much less so on the floor counter-liner.


...



b.

[Don C L]

Originally Posted by wingssail

To make it pretty sand and prep the steel with epoxy, then paint white. Cut a light weight molding out of teak or other wood to match the interior.

It will be gorgeous.

Yeah, I dunno, I'd still think in terms of a big foam covering with beautiful soft fabric Because you WILL hit your head on it.

[wingssail]

Originally Posted by Don C L

Yeah, I dunno, I'd still think in terms of a big foam covering with beautiful soft fabric Because you WILL hit your head on it.

That's ugly, go for beauty over practicality.

In my boat there are two walkthroughs in the passageway forward. If I don't duck I can hit either of them, but I never do. Walking forward or coming back I always have my head ducked a little. Except if there are a couple of jibs on the sole that raise me up, then I hit, but the wood trim makes it more gentle than a iron beam.

Anyhow, as I mentioned before, looks are important to me. I like looking at this arch.

[mikebikeboy]

I got a quote today from https://www.metalsupermarkets.com/

22 inches long, 4x4"x0.5" 316 Stainless steel angle beam - $184

Would have to see how much they'd charge to cut the arch

Not bad though.

[mikebikeboy]

Originally Posted by wingssail

That's ugly, go for beauty over practicality.

In my boat there are two walkthroughs in the passageway forward. If I don't duck I can hit either of them, but I never do. Walking forward or coming back I always have my head ducked a little. Except if there are a couple of jibs on the sole that raise me up, then I hit, but the wood trim makes it more gentle than a iron beam.

Anyhow, as I mentioned before, looks are important to me. I like looking at this arch.

Haha

I think the boat needs to be pretty, it's kinda like your girlfriend

If you bonk yer head it's a wake up call

[wingssail]

Originally Posted by mikebikeboy

I got a quote today from https://www.metalsupermarkets.com/

22 inches long, 4x4"x0.5" 316 Stainless steel angle beam - $184

Would have to see how much they'd charge to cut the arch

Not bad though.

Most of the time there is a savings if you don't require polishing. Something to consider.

[thomm225]

So here is the repair on my boat. There was a spot where dark liquid had appeared to come out from some sort of injection before I painted over it a couple years ago..

The PO went on a 2 year cruise probably in 2004 then he left the boat near here in 2006. I bought it in 2011 so that tells you how old the repair might be.

[mikebikeboy]

Originally Posted by thomm225

So here is the repair on my boat. There was a spot where dark liquid had appeared to come out from some sort of injection before I painted over it a couple years ago..

The PO went on a 2 year cruise probably in 2004 then he left the boat near here in 2006. I bought it in 2011 so that tells you how old the repair might be.

Hi Tom thanks for posting those pics. What did you use to reinforce the area above the door threshhold?
Looks like a job well done

[mikebikeboy]

Originally Posted by Don C L

Yeah, I dunno, I'd still think in terms of a big foam covering with beautiful soft fabric Because you WILL hit your head on it.

I will look like this guy after a couple years with the bare steel beam?

[Don C L]

Originally Posted by mikebikeboy

I will look like this guy after a couple years with the bare steel beam?

yeah only after you wake up in the middle of the night in the pitch dark and you hear something go bump or the wind shifts, and you forget to duck as you bolt up to see what's going on!
Ok maybe that's just me.

[Ianau]

I would consult a structural engineer before removing a compression post or altering an arch or installing a beam supporting a mast.

The forces are in the tons and what happens when an arch or beam deflects - the side forces from deflection go outwards, which does not seem to have been taken into account in this discussion so far.

[thomm225]

Originally Posted by mikebikeboy

Hi Tom thanks for posting those pics. What did you use to reinforce the area above the door threshhold?
Looks like a job well done

The PO did that repair or paid someone to do it.

I have totally repainted the interior so you can no longer see the hole, but it appeared that a hole was drilled into the area near the dip and some epoxy or something similar was forced in with quite a bit of pressure I'm thinking while possibly having something like a jack in there holding the ceiling/arch up into proper position

Maybe some of the others can tell us how that was done.