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Old 07-14-2015, 05:34 PM   #1
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Radical Manatee Transom door mod

A swim platform might be a great design, but how easy is it to access. Access might be great, but maybe the platform sucks.

Anyway, my own boat is not an easy boat to fit with a platform. The original tailgate door on the transom is a decent idea, but access isn't so easy. Ladders "work", but that's about all you can say for us seniors. With high bulwerks and skinny-ass steps, climbing back into the boat can be painful. We realized that if water access were easy, our usage of the boat would probably triple. After making sure we had a really substantial platform, we played with the ideas of making the access just as convenient. The tailgate style of transom door didn't work with the plan. It was risky to do something radical, but we had to make sure that whatever we ended up with didn't alter the way the original transom design absorbed stresses. Additionally, the alteration had to ease entry and exit to and from the boat whether on the water or docking. Lastly, it had to become serve as the recovery area for our MOB plan. After a lot of thought, this is the best we could come up with.

The transom tailgate was removed and rebuilt. I couldn't find a band saw with a large enough throat to make the whole cut in one pass, so I built a jig around it so a saw could be utilized to make a 45 degree vertical (slightly helical) cut. This all sounds very smart, but the cut was made with a saws-all and didn't come out perfect. There was plenty of extra work created to smooth-out the mistakes. Each half of the door was fitted in the position of the original door, then hinged to lift first, then pivot 180 degrees inward. This takes some space from the veranda, but we were surprised how little the swing of each door needs. It only slightly altered the original position of the veranda furniture. Access to and from the swim platform is a dream, as if it is now just an extension of the veranda. Eight 3/8" stainless plate brackets make it feel as though it is part of the veranda floor. It fits perfectly with our MOB plan and has changed the way we will use and think about our boat. Dinghy access has also been completely facilitated, as has access to the boat from floating docks. We still need to build a wide-step ladder and finalize a position for it. Each door now has a hatch compartment built in to store masks, fins, or whatever. The way the doors fit together in the original wedged position direct the stresses exactly as before in the case of a direct hit on the transom. Although I'll probably add another hinge to each door, they play little part in keeping the doors in place and swing the 35 lb. doors easily. Photos to follow in the next post.
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Old 07-14-2015, 06:37 PM   #2
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Here's the first six photos with text in the photo. Click on photo to enlarge.
Attached Thumbnails
transom door 1.jpg   transom door 2.jpg   Transom door 3.jpg   transom door 4.jpg   transom door 5.jpg  

transom door 6.jpg  
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Old 07-14-2015, 07:48 PM   #3
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Great idea . Beautifully executed as always . Larry you are da man .
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Old 07-14-2015, 07:49 PM   #4
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Very clever and smart design. The next step is to change your avatar photo....
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Old 07-14-2015, 07:52 PM   #5
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Wow I love it run it over to Marina Jack to show it off
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Old 07-14-2015, 08:32 PM   #6
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Larry, we talked about this at Indian Town last fall. They were supposed to be pocket doors, wtf?

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Old 07-14-2015, 09:26 PM   #7
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Larry, we talked about this at Indian Town last fall. They were supposed to be pocket doors, wtf?

Ted
Can't figure it, Ted. It worked fine on Photoshop, but the real thing left the transom too weak. WTF?
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Old 07-14-2015, 09:55 PM   #8
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Can't figure it, Ted. It worked fine on Photoshop, but the real thing left the transom too weak. WTF?
WTF = what the f*ck.

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Old 07-14-2015, 09:58 PM   #9
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That's a great mod, HH! Looks like you thought it all out well in advance and planned well for the big cut. But starting that big cut still must have been nerve wracking.

Very nice work!!
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Old 07-15-2015, 08:38 AM   #10
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That's a great mod, HH! Looks like you thought it all out well in advance and planned well for the big cut. But starting that big cut still must have been nerve wracking.

Very nice work!!
Exactly, and like I said, the cut wasn't without error. Hours and hours and hours of adjusting. While I was messing about in the archives, I came across this photo of Kassie, one of the best conditioned Manatees out there. For their solution, they made two separate platforms on either side of the tailgate so that when the tailgate was let down, there was a level area on both sides, voila...a swim platform. Trouble is, there are still the tailgate retainer cables to step over, and the platform ends up very high above the water. I don't know about you, but getting older, I don't need something else to trip over. Not much improvement in boat or water access over the tailgate alone.
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transom door 7.jpg  
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Old 07-15-2015, 08:41 AM   #11
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To continue, here are some shots and descriptions after the cut. The top rail cap was cut with a table saw, and the rest was done with a saws-all. There was no progress until I actually hinged and mounted the doors as they would be, and then cut the 8 X 24 holes for separate access hatches in each door. Finally with the easy access to the inside, the glassing could be done from the inside while the doors were in the closed position, providing for a pretty good roughed-out fit. We used wax paper and waxed formica as a barrier to keep from glassing the doors together, but there were still a few places that adhered, and we had to saw the doors loose again with a hacksaw blade.
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transom door 8.jpg   transom door 9.jpg   transom door 10.jpg  
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Old 07-15-2015, 08:53 AM   #12
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Great project, thanks for sharing!
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Old 07-15-2015, 09:02 AM   #13
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What a great modification.

Nothing like taking a sawsall to you boat. You're a brave man.
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Old 07-15-2015, 09:21 AM   #14
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Da-um, Larry. What a great mod. Truly a craftsman like job. You have been improving Bucky without affecting the original design look of the boat. I am feeling very unworthy.

Don't forget about cruising!
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Old 07-15-2015, 09:33 AM   #15
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Don't forget about cruising!
Cruising?! What's that? Boats are for working and slaving and spending money on.
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Old 07-15-2015, 09:51 AM   #16
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Masterful job, Larry. Reality really can be better than Photoshop!
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Old 07-15-2015, 09:53 AM   #17
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Cruising?! What's that? Boats are for working and slaving and spending money on.
Oh yeah, I've been reading boating ads, and almost forgot a boat's real purpose.
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Old 07-15-2015, 12:18 PM   #18
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Oh yeah, I've been reading boating ads, and almost forgot a boat's real purpose.
That's Manatee, not porpoise.

Very nicely done, Larry. That tailgate setup was a bit goofy.
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Old 07-15-2015, 05:55 PM   #19
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To continue, as mentioned, the attempt to glass the open ends really failed miserably. There was no choice but to mount and hinge the door halves in place to see where and how to add or subtract glass. In the mounting process, there were other issues to resolve. Here's how we addressed them. Click to enlarge.
Attached Thumbnails
transom door 11.jpg   transom door 12.jpg   transom door 13.jpg   transom door 14.jpg   transom door 15.jpg  

transom door 16.jpg   transom door 17.jpg  
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Old 07-15-2015, 08:42 PM   #20
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Pretty Spiffaly, nice improvement. But where is the shower gonna go?
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