Stop data brokers from exposing your personal information. Go to my sponsor aura.com/bisforbuild to get a 14-day free trial and see how much of yours is being sold

Hey Chris, from an engineering perspective, those welds need re-enforcement. Your joins are central and I would you recommend doing 2 things: 1. Weld an alu belt (500mm wide) over your centre line weld and then 2. Weld at least 4 horizontal struts over this join for reenforcement. Your support struts should be at least 1m in length and 100hx100wx4mm material width. The way you have carried out the work so far is great, but as an engineer, I would not certify this structure currently as it is.

Never seen a boat designed using quadtoon mechanics, impressive!

Chris, I appreciate you and your team taking on this ambitious project. That being said, it IS ambitious, please listen to some of the concerns in the comments. You have naval architects and structural engineers pleading that you make some design changes to ensure the success of the project. The design process is not one straight line. Your first design is changed a lot as the project moves forward. Don't be discouraged to change your initial design. You have a wealth of experts in your audience who are happy to help! That being said, I love your projects and I hope it all goes well for you!

Listening to that explanation of the flotation I am so glad we use the metric system.

*You should run your calculations by an engineer @Chris* *If you put the hot tub on the bow you are going to have issues getting on plain, you want to keep the bow light* *I have a lot of experience working on boats, I think you are going to find you have overlooked a few things on this boat build*

Didn’t even notice the time lapse scrolling till you mentioned it, don’t stress about it. boats looking good

I would imagine that the pontoon tubing wall is guaged according to length. Some sort of sleeve should probably be in there across your seam and out a few feet either way.

Showed this to my boat guy, we are excited to see such a unique vessel out on the Columbia and Willamette ! He is worried ab the hot tub location and design as well as I am so we are keeping our fingers crossed that you are safe when testing !

Should call it the Tritanic.

That is going to crack without a sleeve

Notice the factory splices have a 25in round disk tieing them together......I wouldn't skip that

You should connect the strakes on the ends together where you joined the tubes. That gives more support. You probably should add a strake on the other side too.

I’d be worried about the bending moment of the length, but that’s probably why it has 4 toons.

I’d imagine adding a supporting plate going over the welds of the pontoons would add a fair amount of strength. Don’t think it’d be a bad idea either

Agree with the comments on lack of strength of the pontoon in the area of the welds Oscar has put in. I an ideal world, to make longer pontoons you would start with larger diameter tubes so that the bending moment stays about the same. Need to calculate for vertical bending of the structure, when each end is on the peak of the wave, and midships is in a trough. With the payload (people) in the middle. However, rather than reinforcing the weld area, I would make sure there is sufficient strength (including triangulation) in the upper structure, that ties in to the tubes towards the bow and stern. By the way, what you are calling stringers are actually deck beams. Stringers go longitudinally. Great project. Don't forget the lifejackets!!

How are you planning on transporting it? A trailer build first would have made things easy.

They'll have to bisforbuild a giant trailer to move that thing too, better get started so they can be done by the end of next season

Won't the extreme pontoon length cause flex and cracking around the welds? Might have been safer to have kept them as individual units mounted solidly together.

Fill the pontoons with expanding foam, closed-cell spray foam insulation is highly moisture resistant. If you hit something you won't sink. It is just a thin Aluminum...

I used to work at Vigor marine in clackamas. You guys really gotta back grind your starts and stops on those welds or they may start cracking. Also somewhat nervous that there is no sleeving. Good Luck!!

This is the most exciting build for me to watch you guys do. Idk why because I love all your builds, but this thing is awesome!

I personally can’t wait for the mini pontoon build with the extra nose cones

"It's correct for everyone that works here but" 😂😂😂

The journey is half the fun. You have an outstanding channel! I subscribed immediately. Thank you for sharing it.

Those aluminum welds will unzip after floating the boat. The weld itself may hold but the metal directly next to the edge of the welds will fail.

@bisforbuild lol my welding teacher in college build a boat for himself and got a little carried away with the height of the cabin and he had to "renovate" to get the thing out at the end. boat turned out great though he has went down to the bahamas (from canada) multiple times. love your videos you guys are an inspiration. cheers boys!

Okay Chris, you've got four of those pontoon ends; we definitely need a stubby catamaran tender! Two stubby pontoons, a little bit of framing, maybe a stretched webbing deck!

Awesome as always.Thanks for sharing and taking us along

Love to see this. Chris always pushing his boundaries into the unknown, such a great learning experience. Will everything work out perfectly on a brand new design on a first ever B is for Boat build? We hope so, but what makes such fun content is the trial and error and drama along the way. I think Chris knows this and is a genius for attempting this build.

Does anyone else think this is going to break in half?

I have to admire your ambition. Looking forward to seeing this thing come to life.

Should go straight really well’ the trick will be turning this sucker. Looking forward to seeing this fun build!

I've been watching KZfaq for about 12 years and have never been so pumped for a buil like this one.

The foam idea inside the poontoons is used in other boats to make them very safe... Boston whalers are made this way I believe... love the show!!!

*The formula for calculating the floatation of a pontoon is F = (D - W) / V, where:* F: is the floatation force D: is the density of the water W: is the weight of the pontoon V: is the volume of the pontoon To calculate buoyancy, you can multiply the volume of the pontoons by 62 lbs. per qu. ft.. Or you can use the "Twenty Percent" Rule to ensure that you build a safety margin. This rule has two ways to go about it: •Subtract 20% from the capacity plate's total listed weight capacity and use that as the maximum permissible weight •Calculate the total weight of your passengers and cargo and subsequently increase the total by 20% *I didn't want to take the time to type all this out so I copied and pasted it for you, hope it helps* 😅👍

Such a cool project. I am keen to see how this turns out

So freakin’ cool! Can’t wait for the next video - thank you!

This is awesome. My favorite episode will be when they move it to the water 😂

So excited for you guys and a tiny bit jealous 😢. Can't wait for the finished product 😂❤

I consistently enjoy your series. I particularly appreciate when you mention the 'target completion date.' While I enjoy the camper series, it lacks a clear objective. As an IT professional, I'm accustomed to working within set deadlines and budget constraints, as I'm sure you understand. Sometimes, it slips the audience's mind that these episodes aren't released chronologically, leading to surprise when a new series interrupts an ongoing one. My suggestion is to provide more insight into your project timelines, so we can eagerly anticipate upcoming videos. Thank you for your valuable content!

Y'all are crazy, I like it!

The lifting strakes on the pontoons also provide extra strength to the pontoons to prevent them from bending or breaking. Have you given any thought to adding some aluminum angle to augment the area where the 2 pontoons were joined. I expect your deck to provide some support to keep the pontoons together, but it may not be enough.

Don't worry about the strips on the time lapse, your content is A++ either way! Keep doin what you do, appreciate you!

The timelapse banding issue is usually due to a mismatch between camera shutter speed and the refresh frequency of the lighting. I very rarely shoot video, but I have encountered the same issue a long time ago and I believe I solved it by matching the shutter speed with the frequency of the electricity supply.

Nice project, it is huge! Hope it will turn out as great as you wish. I would suggest to cap and seal those middle two pontoons. Much easier to leak test and leak proof that way then connecting both to the a big box.

I would honestly do your motor transoms before u get to far on those toons so they are easier to move and prep now! I absolutely love this build

This looks to be coming together really well

The b is for build team are so talented! Just normal guys with ambition and focus!! Well done guys

Dear Chris, congratulations on your new built. I would like to point out some things that concern me about the Pantoone build. first of all you are welding two independent sections and those sections are held by a tiny weld in the middle, you should consider that that’s going to be under a lot of pressure and the weakest point. it could be the failure point on the pontoon sections , if you see the original pantoon sections they each have a long brace that goes from the beginning until the end of each section and that is to give strength to the cylindrical sections. Consider placing 2 continues support beams two brace each side of the new pontoon sections welded to brace them so it mitigates, putting all the force on the welds and preventing the pantoon from bending in the middle and reaching a catastrophic failure. Congrats to you and your team on embarking on a new journey. I really enjoy watching your videos.

oscar un super soldador solda oro con plata y cobre con acero bravo !!!!!

I do not think I have ever seen a fully working finished project on this channel 😆

Something to think about regarding the pontoon joints and lift strakes. The lift strakes add stiffness to the pontoon, the welded joint won't have this reinforcement. The strakes need to be tied together so the welded joint won't have to take the entire flex load. This build will be epic.

Good time now to start thinking ahead about logistics - transporting your finished product to the waterfront.

Thanks for your awesome works and videos. I guess, as certainly already pointed out by other, that vertical stripping is probably due to frequency of your LED light and the frame rate of the camera. My best guest is to ask the LED light provider as they are certainly aware of the problem and solutions. Thanks again for the great work.

Strangely enough I can’t wait to see this boat done so that we can see the trailer you build to move it! 😂 love this content!

At least you are out there making it happen brother. As an engineer with lots of marine experience, I’m routing for you. PS, I’m stoked to see what happens when you get the right props on that yacht, you may find yourself spending a lot more time with it when that happens!!!

Great project. My concern wouod be a small leak allowing water into a pontoon. While not deep, even a 1/2 inch\ 1cm water level would cause massive problems due to free surface effect. Multiple bilge pumps, baffles and inspection ports needed.

Best build yet!!!

When its done id love to go out on its maiden voyage , Im here in Minnesota and have been on the water all my 66 years of life ! I think down the Mississippi would be epic ! Start at Stillwater Mn. down the St. Crouix to the Mississippi to Lake City then back ! Lots of sand bars and islands to party at and maybe camp out, with big bonfires and some barley pops !

2 things- 1 move the hottub to the back all that weight in the front youre going to take water over the bow and swamp the boat. 2 your going to want to mount 2 engines on the outside corners. Turning that thing in the wind and current will be extremely challenging. Look at the large premier brand pontoons for inspiration

A 40ft trailer to build this on seems like a good idea. Then you can build a jig to keep them straight.

Wow! It's HUGEEE!!!

Love the new build for sure

You might want to add a tube in the pontoon’s to make room for bow thrusters. Thrusters will really help with a boat that length.

I think the 27 in pontoons also reduce the bending of the outer pontoons. So the inner pontoons become almost like a girder to reduce bending moments. I am all on board with the idea of spraying closed cell foam into the pontoons to make them both stronger and more boyant in the case of an incident. Looks like being an incredible lake boat but your going to need a large float to transport it and also need to take into account lifting points for launching.

Awesome idea.

Note of attention! Avoid welding the pontoons under pressure. They could explode! Check videos alerting about welding rims with inflated tires.

That thing is going to be massive can't wait to see the trailer that you put that on that's going to be just as big and massive

haha this has to be your nuttiest project. when you showed how long it was going to be it really made laugh. can't wait to see this behemoth on the water and the looks it gets.

Cool build 😎

I would definitely continue the mounting angle across the welds for structural strength.

Exciting project. The camper as well. And then there is the Italian yacht. The draw on this build is the boating enthusiasts.

What a MONSTER!

The length of the pontoons are my concern. Do you plan on turning? Do not go out in big waves, the pontoons will be on the crest of the waves with the middle unsupported. Eventually, it may snap the welds.

If you put the hot tub in the back you could use the engine cooling as hot tub heating :)

When people stand on the front of a pontoon boat it digs in the water really badly. Curious to see the weight and drag of the hot tub… hope it works!

Loving this build. I just can’t help but think how much easier those buoyancy calculations would be using metric! I realise that might be a contentious topic, but it really is so much easier. And I guess it will still float, however you calculate it.

That buoyancy calc made me love the metric system more particularly for the conversions.

This is awesome

so far there's like 20 on going projects and all half attempted, nice

These guys are smart , I’m sure they will reinforce the welded units. Right b is 4 b 😊

Fantastic guys great content! Keep them coming. Anything ever happen with the single seater after you finished it? Ever raced it?

have i missed any comment where the manufacturer of the pontoons said yeah we specked these out to be fine when welded together and made twice as long and with the interrupted lifting strike that i think is also there to make the whole pontoon more ridged

I'm excited for this project

Dude this seems likes it’s not going to work but I know you’ll figure it out! Love the boat content man!

I would be happy to come help you break it in when its ready to float :) Gona be an awesome party boat!

The spam call commercial was funny because it reminds me of those infomercials, “does this happen to you?” You guys should lean into that a little. 😂 Nice work boys!

Crazy ! Impressive :)

Loving it, did you hint at a build at the old shop/house you bought back in the day - You borrowed money off your mum but paid her back back in the day - that place. Loving the new content but I may speak for a few saying I miss the old shop. Not big enough for what your're doing now but you and your team in that place was inspiring.

I am super excited for this. OMG your measurement system is so crazy to me! I assume your superstructure will also add structure and support the pontoons?

This is gonna be wild.

displacement calculations get so much easier if you'd simply tolerate the metric system... but suppose football yards and bald eagle eggs will have to do til then

@BisforBuild something to look into is railing around the “sun pads”. If there is low rails people will be allowed to legally lay on them while underway. Also I’m slightly surprised you didn’t go with pontoon stuffs plastic toons. I saw a guy put lights in them, made a really cool party vibe. Maybe look into that for v2

Transporting and launching it will be fun.

Seeing that being pulled behind the the dually camper truck is gonna look nuts lol

My worries are 1) the resistance from bending under weight. Constant shifts minuscule over time does what it does to all metals. 2) resistance to ea pontoon with their massive length rolling in/out in between each other (trying to separate from each other) outwards. Those calculators do t factor a lot of what nature can do to numbers that only account for a static vessel. Boats are not as static as we think they are. Theres some massive physics that will be challenged when fully weighted and in water that is constantly moving. It’s a crushing weight that being floated by pontoons above the water without any body below the water to set a balance from what’s above the water vs below. Just my worries, wishing the best for you all ♥️✊🏽

Been watching for years but never realized I was never subscribed lol😂

Is this thing gonna get down the driveway? Lol... Awesome.

To set the width, you should place the pontoons in your shops door jam with a 5/8" spacer on either side