Catalina 34

General Activities => Main Message Board => Topic started by: patrice on April 09, 2013, 09:31:51 AM

Title: swim platform added
Post by: patrice on April 09, 2013, 09:31:51 AM
Hi All,

Having a C34 MKI, the acces not always easy from the dinghy, I'd like to had some kind of swim platform.
Being on a mooring, getting everything in the boat would be better.

I'd like to have something not big, just enough to stand.

Does some of you did this addition on their boat, and if you have pictures, that would be great.

Thanks.
Title: Re: swim platform added
Post by: Kevin Henderson on April 09, 2013, 09:46:42 AM
Patrice,

I feel your pain not having an accesable platform at the stern of the boat.  I had once seen a MK-I with an added platform.  To be honest, I was not entirely sold on the look or the functionality of it.  I'm not certain how well it could hold up to the stress.  I'm certain it caould be done however.
That being said... If it was my boat I would consider adding the Garhauer outboard davit mounted on the stern rail.  With the modification made to it as described in the Tech Wiki, it makes handling the raising and lowering of the davit lines a breeze while sitting in a dighy at water level. By using the davit you could hoist up and swing groceries, supplies etc. into the boat eaier than standing in the dinghy but probably not as easily as stepping onto a platform. 
Title: Re: swim platform added
Post by: patrice on April 09, 2013, 10:39:51 AM
HI,

I would like something like this, about 12 to 14in. max deep.
Stainless tube frame with teak plank inside.
Keep the 2 steps to get in cockpit.
just have to figure a new way for the swim ladder.

(http://i290.photobucket.com/albums/ll275/Encore-C25/sternplatform1.jpg)
Title: Re: swim platform added
Post by: Stu Jackson on April 09, 2013, 11:01:06 AM
This messgae board has a very powerful search engine.

I typed in swim platform and found this, for example, in the top four or five posts.

http://c34.org/bbs/index.php/topic,4456.15.html (http://c34.org/bbs/index.php/topic,4456.15.html)

And another one with a slightly different approach that addresses your concerns about the ladder:

http://c34.org/bbs/index.php/topic,5639.0.html (http://c34.org/bbs/index.php/topic,5639.0.html)

Please, try the search feature and read some more, too.

Good luck.
Title: Re: swim platform added
Post by: Ted Pounds on April 09, 2013, 01:31:37 PM
Defender and West Marine sell a number of nice ladders that are made for mounting on swim platforms.  So that's the easy part once you figure out how to do the platform.   :thumb:
Title: Re: swim platform added
Post by: Ron Hill on April 09, 2013, 03:09:34 PM
Pat : I remember publishing an article in the late 1990s in the Mainsheet tech notes (with picture) from an owner that installed a swim platform on a MKI.
Title: Re: swim platform added
Post by: Roc on April 10, 2013, 03:58:36 AM
How about something like this. 
http://www.overtons.com/modperl/product/details.cgi?pdesc=Chrome-Plated-Brass-Folding-Step&i=72311&r=view&aID=601K1&cvsfa=2587&cvsfe=2&cvsfhu=3732333131&cID=SHOPPING_72311

Title: Re: swim platform added
Post by: patrice on April 10, 2013, 06:38:51 AM
Thanks for the info.

Stu, the issue sometimes with the search engine, is that in older threads, often people have remove the pictures from their sites.

Roc, nice step, that could work, but would prefer the platform.

Title: Re: swim platform added
Post by: mregan on April 10, 2013, 07:45:28 AM
Patrice
I built a swim platform last year on my C-30.  Had some SS tubing laying around so I welded up a frame.   I used Trex (composite decking) for the platform.  It was inexpensive compared to teak.  Bolted it through the transom and added 1/8" ss cables.  One end of the cable bolted to the platform other side wrapped around the backstays.  Helps take the weight when someone was on the platform.  If I had kept the boat, I would have removed the Trex and installed some new Trex but shape it more to flow with the boat.  I was rushing to get the platform completed before I put it in the water last season so I just cut some straight pieces and screwed them on the frame.  Didn't like the way it struck straight off the boat.
Couple of things I would do differently if making another.  Would try to have some supports underneath so I could get rid of the cables.  Also, would mount it when the boat was in the water.  The platform was level on land, unfortunately the boat wasn't.  I had figured for this but not enough so the platform sloped down slightly.
It was great having the platform to get in and out of the dinghy and when the kids were swimming.  They usually fight on the ladder so it was nice one could be on the platform while the owner was on the ladder.
Title: Re: swim platform added
Post by: Stu Jackson on April 10, 2013, 08:49:01 AM
Quote from: patrice on April 10, 2013, 06:38:51 AM
Thanks for the info.
Stu, the issue sometimes with the search engine, is that in older threads, often people have remove the pictures from their sites.

Patrice, the way this board works is that if someone has posted the photo, it STAYS here.  Most folks post to the board, rather than linking to their own 'sites as some other boards do.  I trust the links I provided had the photos, too, right?

You're right about the "older" threads, because the "first generation" of the software for this board, and some links to the older posts, no longer work.  However, that was for a short period, few photos had been posted then, and the search I did included the links I provided within the first five or six topics that came up.

Good luck on your planning, you certainly now have some good options. :D
Title: Re: swim platform added
Post by: Kevin Henderson on April 10, 2013, 09:00:37 AM
Dang,  hearing all this and seeing the photos, I think I would like a swim platform now.  :think :shock:
Title: Re: swim platform added
Post by: waterdog on April 10, 2013, 07:41:49 PM
Quote from: Kevin Henderson on April 10, 2013, 09:00:37 AM
Dang,  hearing all this and seeing the photos, I think I would like a swim platform now.  :think :shock:

Go with "platforms".   You can keep the original ladder nicely integrated with your rail and a split down the middle.    You climb straight up into your cockpit with no awkward transition over a platform that sticks out.    Plus your marina is less likely to notice the extra length and add it to your bill...

Title: Re: swim platform added
Post by: TonyP on April 11, 2013, 02:55:08 AM
QuotePlus your marina is less likely to notice the extra length and add it to your bill...
Gee ... I hope our marina doesn't realise that our 34 isn't really a 34 as it is. At $20.00 a ft/mth I hope they don't.

Tony
Title: Re: swim platform added
Post by: patrice on April 11, 2013, 11:17:32 AM
Hi All,

Thanks for the ideas and pictures.
Thanks MRegan for the inputs, good points.

Here are some support sold by Defender that would make a good base, and work something from this.
http://www.defender.com/product.jsp?path=-1/10391/299235&id=2131949
Title: Re: swim platform added
Post by: Brent Evans on April 26, 2013, 09:22:31 AM
Here's my solution to a swim platform.  Dinghy boarding is now easy and safe.  I added a collapsible drop-down ladder under the platform for safety.
Title: Re: swim platform added
Post by: Brent Evans on April 26, 2013, 09:24:35 AM
More photos of Tranquility
Title: Re: swim platform added
Post by: Brent Evans on April 26, 2013, 09:42:24 AM
One more photo.  In my opinion, the step does not detract from the lines of the boat . . .
Title: Re: swim platform added
Post by: Kevin Henderson on April 26, 2013, 11:53:16 AM
brent,

That is a wonderfull platform.  I would love to hear more how you installed it and the materials you used. 
I would probably actually consider having a step like that.   :abd:
Title: Re: swim platform added
Post by: patrice on April 26, 2013, 06:33:10 PM
Hi Brent,

Thanks for the pictures, that is exactly what i had imagined i wanted.
Now i have a picture to look at.
:thumb:

The support look like the one sold at defender, is this what you used ?
Did you installed additional support under the starbrite plank.
Title: Re: swim platform added
Post by: Brent Evans on April 27, 2013, 12:13:39 PM
Hi again.  I had Marine Plastics Innovatins,  West Babylon, NY, http://www.marineplasticfab.com/, custom build the 3-ft by 18-inch platform out of Starboard for me.  It cost $300 plus $110 to expedite shipping to me on the West Coast.  I also bought their advertised brackets for $70 but found them utterly inadequate and returned them for refund.  Instead, I had the machine shop at my company fabricate/weld the brackets you see out of 3/8 (I think) stainless. The materials alone was over $100 but the labor was free in my case.  I'm guessing the two brackets alone could easily cost you $300-$400 to have a fabrication shop make them for you.

There are also backing plates inside the lazarette made of the same material with half-inch stainless bolts securing all together.  The smaller carriage bolts securing the platform to the bracket are recessed on the top with plastic caps covering the bolt-heads.  Here's another photo that may show that more clearly.  Notice that I also personally made a little starboard step to strap onto the old swim-ladder support.  This needed a little wedge-shaped starboard mount underneath the step to make the step level with the platform and make it easier to get over the stern-pulpit cross-bar.

In addition to having a MUCH safer way to get in and out of the dinghy, I love my little back porch and, when we're at anchor in some quiet cove, often sit there in the evenings and watch the sun go down, dangling my feet in the water.  Sweet!
Title: Re: swim platform added
Post by: lazybone on April 28, 2013, 06:33:07 AM
Quote from: TonyP on April 11, 2013, 02:55:08 AM
QuotePlus your marina is less likely to notice the extra length and add it to your bill...
Gee ... I hope our marina doesn't realise that our 34 isn't really a 34 as it is. At $20.00 a ft/mth I hope they don't.

Tony

Our Cat measures over 36' ,so says our marina, who measures every boat when on the hard.  
They bill accordingly.
Title: Re: swim platform added
Post by: patrice on April 28, 2013, 05:10:46 PM
Hi Brent,
Thanks again for the extra info.
And the pictures
Title: Re: swim platform added
Post by: patrice on September 08, 2013, 05:28:15 PM
Hi,

So I finally decided to make one this summer.
Really like the use of it.
Just that I did not want to add new holes in the stern, so I made the bracket that is using the existing ladder step as the holding.
The support is hang and clamp from it.
Bought an under mount ladder, 4 steps, so it goes deep enough.
It make going in and out from the dinghy so much easier.

(http://i290.photobucket.com/albums/ll275/Encore-C25/IMG_0408.jpg) (http://s290.photobucket.com/user/Encore-C25/media/IMG_0408.jpg.html)

(http://i290.photobucket.com/albums/ll275/Encore-C25/IMG_0409.jpg) (http://s290.photobucket.com/user/Encore-C25/media/IMG_0409.jpg.html)
Title: Re: swim platform added
Post by: Brent Evans on September 09, 2013, 12:55:34 PM
Nice idea!  Looks great!  The under-mounted, collapsible ladder is the same as mine.  Sure adds peace-of-mind that, should someone fall overboard, they can quickly get themselves out of the water.  I store my dingy sideways on the swim-step too.  Good job!
Title: Re: swim platform added
Post by: Footloose on September 09, 2013, 03:16:06 PM
Brent,

I have considered adding a platform similar to this and carrying the dink sideways as you do.  I have worried about having the dink ripped off the back when healed and going through a wave.  How big is your dinghy?  I just acquired a 9'6'' dink and am wondering if it is too long to be carried that way.
Title: Re: swim platform added
Post by: mregan on September 09, 2013, 04:58:30 PM
Patrice
What did you make the platform out of?  Starboard?  Also how thick is the material.
Title: Re: swim platform added
Post by: Stu Jackson on September 09, 2013, 05:05:16 PM
Quote from: Footloose on September 09, 2013, 03:16:06 PM
I have considered adding a platform similar to this and carrying the dink sideways as you do.  I have worried about having the dink ripped off the back when healed and going through a wave.  How big is your dinghy?  I just acquired a 9'6'' dink and am wondering if it is too long to be carried that way.

Footloose,

Here's a waaaay old thread by Captain Al Watson, who used to own #55, Kindred Spirit, now owned by Dave Commando.

http://www.c34.org/projects/kindred-spirit/davits.html

You really have to check yourself with the trigonometry of the installation - width of dinghy, heeling angle, height of the swim step.

My gut feeling is that a 9'-6" dinghy might, just might, make it if the platform is high enough.  "How high?" you ask.  That's where YOU come in!  :D

I'd bet with a large piece of heavy cardboard you could check it out yourself the next time you go sailing.  Actually, all you'd need is a piece of 1x1 the length of the tubes of the dinghy, 'cuz it's only the bottom end that comes into play, right?  Hang the stick by some light line and move it up and down while you're sailing closehauled and you'll find out soon enough.

Good luck, your question has been raised, quite properly, almost every time the issue trailing a dinghy this way comes up.  IIRC, there is no ONE "right answer."

Let us know what you find if your do the "test."
Title: Re: swim platform added
Post by: Brent Evans on September 09, 2013, 07:48:36 PM
Footloose,
I have a Westmarine HP-275, 9-ft with the high-pressure floor.  If you look up at the photos above, you'll see the step is a good deal above the water; the dink will fit under the step when on the water.  I can't imagine the dinghy catching the water on a hard-over heel but perhaps it's possible.  I came thru the Tacoma Narrows last weekend barreling along at hull speed and heeled over 20 degrees and it wasn't remotely close.  But I'm sailing up in Puget Sound where we suffer from not enough wind.  Perhaps in a blow I'd tow it.  But for other conditions and for motoring, having the dinghy out of the water gives me a half-knot or more and keeps the dinghy pristine.  The platform is rock solid and makes deploying and retrieving the dingy easy not to mention getting into and out of the dinghy.  We love it.
Title: Re: swim platform added
Post by: patrice on September 10, 2013, 05:41:20 AM
Quote from: mregan on September 09, 2013, 04:58:30 PM
Patrice
What did you make the platform out of?  Starboard?  Also how thick is the material.

Hi,

I actually used plywood 3/4'' thick.
Coated with 2 layers of epoxy.  And I sprinkle some fine sand on the last one to make the antislip.
Then added 2 coates of paint.
Title: Re: swim platform added
Post by: Footloose on September 10, 2013, 07:08:21 AM
I like the idea of having the platform high enough that the dink can go under it.  That way you can step down into the center of the boat and not out into it, pushing it away from the mothership.  Will try to do some measuring this weekend.  Sadly we are going on the hard shortly.  I will have all winter to mull it over.  The admiral has been wanting a swim platform for a while.

Like others I do not like towing a dinghy and would rather stow it on the foredeck.  Davits seem like an expensive option and I will get even more grief on the race course.  My BBQ and dodger stay on just to aggravate people.

Dave
Title: Re: swim platform added
Post by: Bobg on September 10, 2013, 07:18:58 AM
Patrice, looking at your picture, it appears you took the lower stern pulpit rail off , do you have any issues with that? that rail is always in the way when getting into and out of the boat.  Very nice platform  thank you Bob
Title: Re: swim platform added
Post by: Stu Jackson on September 10, 2013, 07:25:26 AM
Bob, there was a discussion about this just last week

http://c34.org/bbs/index.php/topic,7708.0.html
Title: Re: swim platform added
Post by: Bobg on September 10, 2013, 07:33:08 AM
thanks stu, after scroling down and seeing that, I sure felt foolish.  Lots of good ideas, just when you got the boat the way you want it, you see stuff like this, time to get to work again.  Which is really kind of fun stuff to do.  (the not necessary fun projects)  Bob
Title: Re: swim platform added
Post by: patrice on September 11, 2013, 08:18:20 AM
Hi Bob,

As you saw in the other thread that Stu showed, I did not had to cut the pulpit bottom rail.  It was like that.
But we REALLY like the platform.  Yes the dinghy can go under, so boarding or out, is a lot easier.  Just take a step down in the dinghy.
My support are not as nice as the one that stay under the platform, but since I wanted to try a platform, if we would appreciate it, without drilling holes in the hull.
So that I made the support hanging from existing step.
Title: Re: swim platform added
Post by: mregan on September 11, 2013, 11:06:40 AM
What is the depth of the platform?
Title: Re: swim platform added
Post by: Brad Young on June 16, 2015, 06:47:09 AM
Brent, would you make your step any wider, if you had to do it again?

Patrice, how wide is your swim step?
Title: Re: swim platform added
Post by: mregan on June 16, 2015, 11:35:01 AM
I don't mind the middle support rail.  I like to lean back against it while I'm sailing.

I was looking at Marine Liquidators online. http://www.themarineconnection.net/LaddersPlatforms.html  They seem to have a bunch of swim platforms in stock.  If I can ever remember, I'm going to make a cardboard template with the size I want then email the dimensions down to them and see if they have something in stock.  I think I would make mine the width of the transom.  I built one for my last boat and the kids really liked sitting/jumping off it so for me wider would be better.


Sorry can't get the picture below to come up as a picture.

http://store.themarineconnection.net/auto/zoomview.php?picture=dscn0382a.jpg&domain=themarineconnection.net&copied=YES
Title: Re: swim platform added
Post by: patrice on June 17, 2015, 08:22:32 AM
Hi,

The platform is the same width as the transom at the level it is standing, and about 14in. deep.
As it goes away from transom, there is an angle, about 10 deg and made big radius, about 6in at the outside corners.

I don't have a picture from top, will take one next w-e.

Title: Re: swim platform added
Post by: mregan on June 24, 2015, 12:03:08 PM
Patrice
Do you notice any flex in the plywood if you are standing off to one side of the platform.  I'm thinking of making one out of StarBoard pretty much like you made.  Not sure if I should go 3/4" or 1" thick.
Title: Re: swim platform added
Post by: patrice on June 25, 2015, 03:27:38 PM
Hi.

I used 3/4" plywood.
The flex is not very noticable.

Title: Re: swim platform added
Post by: Bobg on June 29, 2015, 06:32:05 PM
just finished and sea tried my new platform, looks like patrice's, I used 3/4" plywood, and added 3/8" plywood to it, then fiberglassed both sides with fiberglass cloth, I had a piece of aluminum plate i put on the bottom, then put a 4 step telescoping ladder under there, I painted it with topside paint and sprinked sand on it, I really love it, very sturdy, zero flex, I will post picture later
Title: Re: swim platform added
Post by: patrice on July 09, 2015, 06:06:15 AM
Hi,

Finally, here are more pics from top and side close-up.

(http://i290.photobucket.com/albums/ll275/Encore-C25/20150705_120259.jpg) (http://s290.photobucket.com/user/Encore-C25/media/20150705_120259.jpg.html)

(http://i290.photobucket.com/albums/ll275/Encore-C25/20150705_120355.jpg) (http://s290.photobucket.com/user/Encore-C25/media/20150705_120355.jpg.html)

(http://i290.photobucket.com/albums/ll275/Encore-C25/20150705_120139.jpg) (http://s290.photobucket.com/user/Encore-C25/media/20150705_120139.jpg.html)

(http://i290.photobucket.com/albums/ll275/Encore-C25/20150705_115959.jpg) (http://s290.photobucket.com/user/Encore-C25/media/20150705_115959.jpg.html)
Title: Re: swim platform added
Post by: Ken Juul on July 09, 2015, 05:52:53 PM
So very functonial and looks great too.  I'm so glad the admiral insisted on a walk thru transom.  Not sure I would have had the patience/fortitude to put something like that together.  Please document it in the tech wiki.
Title: Re: swim platform added
Post by: Noah on July 09, 2015, 07:13:13 PM
My dog insisted on a walk-through transom too...but all he got was a walkover ladder with a sugar scoop shelf transom. He's not happy, nor graceful climbing the ladder.  I stand on the sugar scoop stern/step and heft him with his life jacket strap onto the boat. Fortunately he is a willing to please 35lb mini-Labradoodle, so not too much of a lift! :cry4` :shock: 8)
Title: Re: swim platform added
Post by: mregan on July 10, 2015, 03:47:24 PM
Patrice
Looks good.  I'm in the process now of building mine.  Did you get a 3 step ladder or 4 step?  Any thought of putting slots in the platform.  Another site was mentioning you needed slots to relieve water pressure if you get any wave action.  Seemed to be more of a powerboat issue but got me thinking.
When you climb up the ladder, what do you grab onto to pull you up on the platform?
Title: Re: swim platform added
Post by: patrice on July 13, 2015, 05:47:30 AM
Quote from: mregan on July 10, 2015, 03:47:24 PM
Patrice
Looks good.  I'm in the process now of building mine.  Did you get a 3 step ladder or 4 step?  Any thought of putting slots in the platform.  Another site was mentioning you needed slots to relieve water pressure if you get any wave action.  Seemed to be more of a powerboat issue but got me thinking.
When you climb up the ladder, what do you grab onto to pull you up on the platform?

Hi,

I got the 4 steps ladder, goes a bit more deeper in the water, easier to climb on from a swim.
When we climb up, at the top of the laddder there is a round bar to grab at first (can see on last picture), then the step on top of the platform are about an inch away from transom that give us the next grab.

For the slot in the platform, did not realy looked at this.  This was supposed to be temporary at first, but ended up just fine for our need.  We sail on lake champlain, and won't have major wave here.  Even if we did sail on big wave, to us here on the lake  :D  we did not have any issue.  Maybe if you you sail on the open sea, it would be different.

If you have the standard swim ladder on the transom, I cut the 2 steps close to the support in the middle, to be able to spread the lader appart and leave the support in place.
Title: Re: swim platform added
Post by: mregan on July 13, 2015, 10:12:55 AM
Thanks. Another question on the ladder.  When it is closed and stowed, to the steps hang out past the platform?   I was looking online at the retractable ladders and it looks like if you mount the bracket at the edge of the platform the steps will hand out past it.  If you mount it back so the steps are hidden when closed, when open, the steps will be a couple of inches under the platform which may make it hard to climb up.
Title: Re: swim platform added
Post by: patrice on July 13, 2015, 11:44:30 AM
Quote from: mregan on July 13, 2015, 10:12:55 AM
Thanks. Another question on the ladder.  When it is closed and stowed, to the steps hang out past the platform?   I was looking online at the retractable ladders and it looks like if you mount the bracket at the edge of the platform the steps will hand out past it.  If you mount it back so the steps are hidden when closed, when open, the steps will be a couple of inches under the platform which may make it hard to climb up.

Hi,

When in the closed position, the steps protrude from platform.
If you try to mount all under, then it will be hard to get to the top step when going down.

I mounted the assembly side rails about 1'' - 1 1/2'' max in.
Best is when you'll get your ladder, you'll see what makes you more confortable for the distance.

Title: Re: swim platform added
Post by: mregan on July 13, 2015, 12:57:49 PM
I think my ladder and platform will be in tomorrow so I'll be able to play around with it.  I'm going to make mine out of Starboard. 

The stainless should be in for the brackets in a day or two.  Having the guy next door weld them up for me.

I'll post pictures when I'm completed.
Title: Re: swim platform added
Post by: Bobg on July 16, 2015, 09:12:48 PM
I made a swim platform like patrice, (exactly like patrice) thanks patrice..my 4 step ladder is mounted under so it does not protrude when stowed, not a issue for me or my swim partners, I really really like it, when on a lazy sail some actually stand on it when under way, hanging on to the boat only at 1-3 knots, also it is now the new mens room (if ya know what I mean)  anyway, can't believe I didn't do this years ago. today my lady sat on it while at anchor and read a book.

I am making one for a friend , this will be out of 3/8" checker plate aluminum.  It is what I have laying around.  Also, my transom is at 22 degrees, be suprised how a couple degrees makes a difference.  first brackets were 25 degrees, made the platform way off.  tried to do it on the hard, will post a picture one of these days, or just look at patrice's, my platform is a little thicker tho
Title: Re: swim platform added
Post by: KWKloeber on July 17, 2015, 11:03:49 AM
Quote from: Bobg on July 16, 2015, 09:12:48 PM
I made a swim platform like patrice, (exactly like patrice) thanks patrice..my 4 step ladder is mounted under so it does not protrude when stowed, not a issue for me or my swim partners, I really really like it, when on a lazy sail some actually stand on it when under way, hanging on to the boat only at 1-3 knots, also it is now the new mens room (if ya know what I mean)  anyway, can't believe I didn't do this years ago. today my lady sat on it while at anchor and read a book.

I am making one for a friend , this will be out of 3/8" checker plate aluminum.  It is what I have laying around.  Also, my transom is at 22 degrees, be suprised how a couple degrees makes a difference.  first brackets were 25 degrees, made the platform way off.  tried to do it on the hard, will post a picture one of these days, or just look at patrice's, my platform is a little thicker tho

Make sure they have shoes on when stepping on the sun-baked aluminum.  Blister city!
Title: Re: swim platform added
Post by: Bobg on July 19, 2015, 05:43:22 AM
I have tested a piece with white epoxy paint, laid it in the sun  stays cool enough
Title: Re: swim platform added
Post by: KWKloeber on July 19, 2015, 12:35:20 PM
Quote from: Bobg on July 19, 2015, 05:43:22 AM
I have tested a piece with white epoxy paint, laid it in the sun  stays cool enough

Ahhhhh.... hadn't realized you were painting it!
Title: Re: swim platform added
Post by: Bobg on July 19, 2015, 06:25:48 PM
ya, and lake superior is pretty cool up here anyway, wanna go with what i have laying around, get tired of all these inflated prices cuz we have boats.  I figured if it got too hot I would screw wood to it. it is only 16 by 21"
Title: Re: swim platform added
Post by: mregan on July 28, 2015, 12:16:14 PM
Just finished my platform this past weekend.  Used 3/4" plywood  and bolted 3/4" anti skid Starboard on top of it.  Was going to use 2 layers of 3/4" starboard but it wasn't sturdy enough.
Built mine more for the kids to use but it is great to get on/off of the paddleboards and dinghy.
Title: Re: swim platform added
Post by: mregan on August 03, 2015, 11:07:11 AM
Another picture of the underside.  Not sure why it came out upside down, it's correct on my computer.

fixed - Stu

Title: Re: swim platform added
Post by: patrice on August 11, 2015, 07:42:19 AM
Hi mregan,

Nice one.
question, from picture of the bottom, did you protect your wood ?

You will enjoy it a lot
Title: Re: swim platform added
Post by: mregan on August 11, 2015, 07:47:36 AM
I did. I have 2 coats of a 2-part penetrating epoxy painted on. 
Title: Re: swim platform added
Post by: Damifudo on December 17, 2015, 01:34:33 PM
I am going to be a swim platform on my Catalina 30.  Does anyone know that angle of the Transom?   I am going to have the platform made from a company called Pasteak.  Thanks for any information you can share to help me with my project.
Title: Re: swim platform added
Post by: britinusa on December 17, 2015, 04:53:21 PM
Pasteak or Plasteak?

http://www.plasteak.com/ (http://www.plasteak.com/)

paul
Title: Re: swim platform added
Post by: KWKloeber on December 18, 2015, 07:09:31 AM
Quote from: Damifudo on December 17, 2015, 01:34:33 PM
I am going to be a swim platform on my Catalina 30.  Does anyone know that angle of the Transom?   I am going to have the platform made from a company called Pasteak.  Thanks for any information you can share to help me with my project.

I use a cheapo Harbor Freight adjustable level when determining angles:

$3
(http://www.harborfreight.com/media/catalog/product/cache/0/image/370x/9df78eab33525d08d6e5fb8d27136e95/i/m/image_16468.jpg)

$$14
(http://www.harborfreight.com/media/catalog/product/cache/0/image/370x/9df78eab33525d08d6e5fb8d27136e95/i/m/image_10921.jpg)

$$$22
(http://www.harborfreight.com/media/catalog/product/cache/0/image/370x/9df78eab33525d08d6e5fb8d27136e95/i/m/image_16790.jpg)

Those are plenty accurate enough for that need, or a Bosch GLM80 if I need to be precise.

$$$$
(http://www.elcart.com/content/images/thumbs/0025479_150.jpg)

Check this out -- notice the curve, so she can fold up against the transom when not in use.
(https://xa.yimg.com/kq/groups/16483836/hr/2086426273/name/macushla+096.jpg)

(https://xa.yimg.com/kq/groups/16483836/hr/586605256/name/macushla+097.jpg)

(https://xa.yimg.com/kq/groups/16483836/hr/1529171850/name/macushla+098.jpg)

Cheers,
Ken
Title: Re: swim platform added
Post by: mregan on December 21, 2015, 02:10:16 PM
I can't remember exactly but I think the angle was around 74* or 16*, depending on which way you looked at it.  I made up some L shaped brackets out of light gauge sheetmetal and taped them to the transom.  Put the level on top and bent them by hand, a little at a time, until they were level.  Brought them to the guy next door and he welded up the brackets out of stainless based on the L brackets.  If you go to any heating and air conditioning contractor near you, they should be able to give you a couple of scrap pieces of 24 or 22 gage metal to use.  Sturdy enough to hold shape but light enough to bend by hand.
Title: Re: swim platform added
Post by: Bobg on December 23, 2015, 09:52:33 AM
I used a magnetic angle finder from harbor freight, my transom is at 22-23 degrees, be surprised how far off you will be with just a couple degrees off.  First one I made was 25 degrees, very noticeable that it was very far off and I had to do it over, I bolted all my angle iron brackets together so I could change them if needed, glad I did.  I  recommend the boat be in the water when finding your angle
Title: Re: swim platform added
Post by: Damifudo on February 03, 2016, 03:50:57 PM
Ok now I am ready for my brackets but I wanted to keep the platform down low on the water but I am afraid to keep the bolts too close together.  My swim Platform is 36" wide by 22" long.  The taller you can get the leg against the transom the less force on the bolts and backer plate and fiberglass.  I went from a 6" x 22 bracket to a 10"x 22 bracket.  Is there any issues with two people on the platform at one time? one holding the dingy while the other gets in?  I can imagine there are times you will have two people on the platform at one time.  I am worried about the force on the fiberglass and the brackets bolts. 

Any advice?
Title: Re: swim platform added
Post by: mark_53 on February 20, 2016, 07:14:37 AM
Quote from: Damifudo on February 03, 2016, 03:50:57 PM
Ok now I am ready for my brackets but I wanted to keep the platform down low on the water but I am afraid to keep the bolts too close together.  My swim Platform is 36" wide by 22" long.  The taller you can get the leg against the transom the less force on the bolts and backer plate and fiberglass.  I went from a 6" x 22 bracket to a 10"x 22 bracket.  Is there any issues with two people on the platform at one time? one holding the dingy while the other gets in?  I can imagine there are times you will have two people on the platform at one time.  I am worried about the force on the fiberglass and the brackets bolts. 

Any advice?
Put two or three five gallon buckets on the platform and slowly fill the buckets with water until you reach 150 percent of the weight of two people. If you see signs of buckling, stop.
Title: Re: swim platform added
Post by: mregan on February 20, 2016, 12:31:15 PM
Our platform is about 18x36.  I think my brackets are about 10" x 16".  We can have 2 people on the platform no problem.  Even had 1 adult & 2 kids on no problem.  The key is the backing plate to spread out the load.  I used some 1/8" thick diamond plate 14"x4".
Title: Re: swim platform added
Post by: dbpaul on February 20, 2016, 05:10:41 PM
Use your cell phone to check level..........


Water in 5 gal bucket weighs 42 lbs and if you use salt water add 3-5 % to weight.


paulj   
         :abd:
Title: Re: swim platform added
Post by: Damifudo on March 06, 2016, 04:20:20 PM
I finished the swim platform today.  I think it came out great I can not wait till it is in the water and I can sit or stand on that back of the boat and enjoy my coffee watching a sun set or sunrise.  I love the ladder.
Title: Re: swim platform added
Post by: Damifudo on March 06, 2016, 04:21:23 PM
another picture.
Title: Re: swim platform added
Post by: Phil Spicer on March 07, 2016, 07:45:36 AM
   Excellent job on your platform and brackets. Nice design. Looks like you could square dance on it. You are sure to enjoy.
Title: Re: swim platform added
Post by: mark_53 on March 07, 2016, 08:27:55 AM
How do you get from the boat to the platform?  The first step looks like a big one.
Title: Re: swim platform added
Post by: Lance Jones on March 07, 2016, 02:41:45 PM
Looks strong.
Title: Re: swim platform added
Post by: mregan on March 08, 2016, 09:16:14 AM
Looks great.  I've got the same ladder, works really well.  So much easier to get in and out of the dinghy.

What did you make the platform out of, looks very sturdy

Only recommendation I would make would be to grind down the corners of the brackets where they hang below the transom.  You wouldn't want the dinghy getting caught on one and rip.
Title: Re: swim platform added
Post by: Noah on March 08, 2016, 11:22:35 AM
Nice swim step! Have you explored the rusty water weeping from your rudder?
Title: Re: swim platform added
Post by: Damifudo on March 18, 2016, 10:48:08 AM
Yes rusty water from from a faulty repair from before it was a deep blister that had filled with water.  The rudder has been repaired and new fiberglass added.    The brackets are stainless steel I had a friend make for me.  I know it is a lot easier to get in and out of the boat on land now.  I can only imagine it will be a huge difference once it is back in the water. 
Title: Re: swim platform added
Post by: patrice on March 18, 2016, 04:39:19 PM
Hi Damifudo,

Looking at your setup, you might want to add a stern step between the platform and the top of stern.

Look at page 3 reply #41 in same thread, you'll see at the pictures the step, will make climbing aboard even more great.

enjoy
Title: Re: swim platform added
Post by: garyw on March 19, 2016, 04:03:21 AM



Hi

In precontemplative stages for this project.   


Not sure whether to use the existing ladder or put new brackets in the stern to support the platform


For those who used the existing ladder - patrice,   not sure what is meant when you say:
you made a bracket that is hung and clamped from the existing ladder.   How did you do this.

For those who put in new brackets , where would I get them from  ?



Thanks

Gary W
Catalina 34 Summer Wind
1986
Boston

Title: Re: swim platform added
Post by: patrice on March 19, 2016, 12:50:25 PM
Quote from: garyw on March 19, 2016, 04:03:21 AM



Hi

In precontemplative stages for this project.   


Not sure whether to use the existing ladder or put new brackets in the stern to support the platform


For those who used the existing ladder - patrice,   not sure what is meant when you say:
you made a bracket that is hung and clamped from the existing ladder.   How did you do this.

For those who put in new brackets , where would I get them from  ?



Thanks

Gary W
Catalina 34 Summer Wind
1986
Boston

Hi Gary,
For my installation, I did remove the existing ladder, but left the support on the transom.
The bracket I made is like a big 'U' upside dowm, and is hung from the ladder support left in place.
From the 'reverse U' bracket I welded the platform support.
I made this type of support because I did not wanted to drill the transom to install platform bracket.

If you look at page 3 reply41 on this thread, you will see my picture.
And page 2 reply16, you will see the clamping to hold in place.
Let me know if I can help more on description.
Title: Re: swim platform added
Post by: garyw on March 25, 2016, 08:14:14 AM
Thanks patrice

not sure what kind of clamp you used

and for those of us who would have to buy brackets if we go in that direction  , where would we get them

Gary W Catalina 34  1986  summer wind
Title: Re: swim platform added
Post by: mregan on March 25, 2016, 08:32:25 AM
You could have any metal fabrication shop make them.  Or a heating/air conditioning company should be able to do them.  I bought some 1" round stainless tubing and used that as my 45* support.  The L shape bracket was made out of 1/8" stainless the fab shop next to us had in stock.  There is a little flex in the 1/8" but once the platform is installed and bolted on, the flex isn't noticeable.  You wouldn't get any flex from 1/4" but I think the 1/8" is fine.  I used the 1" tubing vs. stainless angle iron because I didn't want any sharp edges the dinghy could get caught on.
Title: Re: swim platform added
Post by: Damifudo on March 28, 2016, 07:07:29 AM
The step from the platform into the boat is not that high.  The benefit of not having a step is, its really nice to lean back against the flat  transom when sitting there and enjoying a beverage of choice.   We are going to live with it for a while with no step.  one can always be added.  I have the admirals approval that there is no step needed at this point in time. 


Quote from: patrice on March 18, 2016, 04:39:19 PM
Hi Damifudo,

Looking at your setup, you might want to add a stern step between the platform and the top of stern.

Look at page 3 reply #41 in same thread, you'll see at the pictures the step, will make climbing aboard even more great.

enjoy