Amateur interior designer

I can only find few cad files in that site that don't seem to be helpful.
Nevermind, i appreciate your help anyway

 

Hello again, I'm using this thread one more time to ask questions about the beautiful world of yachts.
In the lower deck, how much space do the walls and the hull take away from the interior space? I've studied the layout on the Admiral Maxima 37 and I can't see about 65 centimeters from each side is taken away and just passed half of the boat it increases greatly,but I can't understand why so much Is taken away. Can I use different materials to lower this numbers?
Thank you in advance as always

 

Laax Its not just the structure of the hull but also the curvature of the hull sides as you move down into the boat that determines how much space you have to work with. You can gain a little back between frames but the hull is what it is.

 

Hello there!

Of course i've noticed that the hull gets narrower as you go toward the bow, but i'm making observation on this super resolution layout of Admiral

http://www.admiralyachts.it/img/admiral_navi/MAXIMA37.jpg

In the garage, you can notice that all the beam is used excepted for a little part near the borders.
As you move to the guestrooms, you can notice the grey part next to the border has become much thicker! and as you proceed toward the bow there's much more taken away.

OFC i'm missing something, a professionist drawed that layout, but i'd like to understand whyit works like that. My house has 2 floor and half above the ground and they get nowhere near to 65 cm of thickness!

EDIT
Aw ok, i misread your post. You were saying that as you move from the main deck level toward the water line, the hull curves (as it's not perpendicular to the water). Well that makes sense... and by looking at the layout i can suppose that between 2 points at a same height from the water line, the curving is higher on the point that is closer to the bow... right?

 

Yes here are two deck heights and sections bow and mid

 

Ok i've understood the principle!

I think that if i want to achieve more beam in the lower deck i must have the room as high from the waterline level i can.

However, i've just looked the layout of Palmer Johnson Supersport 36 m (about the same LOA of my design)

http://www.palmerjohnson.com/36m

and the difference is huge... they're using almost 90% of beam widht in the lower deck in every point.

And by comparing the profile of Admiral with the PJ they don't seem to have huge difference in height above the waterline.

How did they achieve that?

 

Laax the Palmer boat is a totally different hull form and material to the Admiral so the hull structure will be totally different so comparing them would be difficult.

 

I thought carbon fiber could bring differences to be honest...

Keeping Steel as material for the hull, is there anything i can do to get more space in the lower deck?

I'm designing in 2D so i'm not developing the shape, but i'm looking for something like "Yeah Laax, if you would imagine your boat with this shape and have your lower deck only x cm below the waterline, you could expect to decrease by 50% the space taken away compared to the Admiral"

 

Hello again to every member of this forum! Been on holiday for a while so I had no time to focus on this thing of mine.
I came back a couple of days ago and I began searching for new material and I came up with 3 design ideas, 2 partially realized ok CAD.
However, I have a couple of general questions so I can decide which way is the best and further develop it.

1) on almost every yacht I see in the length range I'm working on (120 feet) I see single stairs for passing through various decks. At first I developed a design with double stairs almost everywhere (2 from the "beach club" to the main deck ,2 from main deck to upper deck, double stairs that pass from lower deck all the way to sun deck) with the idea of "imposing" people to use different stairs whether they wanted to going up or down. This avoid collisions between people and on a boat with 16 people (10 guest + 6 crew) I thought it would be smart. However, I've seen only layouts with single stairs. Do you think I'm exaggerating with double stairs?

2) I was thinking about placing the owner suite at bow in the lower deck. I don't mind about not having that much light in the sleeping room (since you are supposed to stay there mainly at night) and I think it makes you feel less "snob" (not the best term) in the eye of your guest.
Something like "good night my dear friends, go to sleep in the lower deck while I'm sleeping in a totally different deck cause I don't want to sleep in that place"
My concerns regard noise level : do you think it can be achieved with modern technology to have low noise level ( less than 35 db)? I'm talking about speed of 8-10 knots , fully electric, displacement and with at least 250 cm between your ears and the end of the bow, which can be eventually taken at 5 meters if you place the bed in the other way (I'd prefer to have the bed facing Stern)

3) I saw many designs that have the pilot house placed between main deck and upper deck. If you see it from the outside it look like the main deck in that part must be really lower... Is it so or it takes height from the Lowe deck below? Or am I missing something else?

I'm actually really thorn around this issues, I'm looking forward to find the answers here!

 

The bow end of the boat is usually where the anchor chain locker is to stow the anchor chain. It is not the best berthing area also since the bow end tends to pitch up and down with the waves. You might need to strap yourself in to your bunk to ride it out through the night passage. In the event of a collision with a partially floating object do you really want your head to be 250 cm from the stem of the craft?

 

With all due respect, honestly, and with the only intention to help, I think you're trying things that are very wrong. In addition to what has already been indicated by other forum members, I would like to warn you of the following:
- If it is a pleasure boat, you should put a height between decks as large as possible for the passenger to move comfortably, without being hit on the head. The only height should study in more detail is the freeboard on the side. I sense, though I have not elements to know, it will not be very large and that can be a serious problem.
- The most important cabin should try to put in the area which least moves in the boat. The bow area is precisely the one that moves the most, even when the boat is anchored, and is a real torture sleeping there. A cabin on the upper deck moves much more than on a lower deck. Should do now some previous calculation to know where is the center of gravity of the water plane.
- A lower noise level of 35 dB seems difficult to achieve but with modern materials, modern technologies, as you say, and money, is it possible to get. Note that many noises are due to vibration of the hull and structure so it should be designed to prevent vibrations from being transmitted.
- You can put all the steps you want but keep in mind that much useful space is lost and, in addition, 16 people can not generate as much traffic as to make it necessary to increase the number of stairs. Advises the passage be patient. Typically, put a ladder on each side for safety reasons. If a ladder is burned, there will always be another available.

Perhaps a picture of what you think would help to provide better support

 

Before trying it yourself I would really recommend taking a look at as many interiors for similar sized boats as possible. Unlike house design where the interior is really just an empty box boats tend to be much more utilitarian, even for very big hulls. There just isn't enough space to take chunks and turn it into unusable area.

And if you aren't working in 3D then it's all for nothing anyway. There are no right angles on a boat, and making the most of dead areas like the hull curve are critical to a good design. Even more important is if you are turning the dead spaces into service ways for electrical/plumbing/venting then you also need to design in ways to make those spaces available for service. Because every part of a boat needs to be accessible, though how accessible is debatable depending on what's stored there.

 

Thank you very much for all your answers! I really appreciate your help! After reading all your posts I think I will make a single stair for the inside and 2 stairs aft of the main deck to reach the upper deck, since I can suppose it's more likely to invite friends that are not part of the yacht guests to enjoy the outdoors areas (which I'm planning with the idea of being convertible into a party area).

I've already seen a lot of interior designs of yachts, it looks like that only small vessels with only 3 or 2 1/2 decks have a layout where all the cabins are in the lower deck: usually the master room at mid deck, 2 double guest cabins a bit forward and a "vip" cabin near the bow.
I don't like this kind of layout at all... First, the definition of "vip" may sound like a joke since it is placed in a bad place for sleeping and second... I wonder how you can divide your guests between VIP and regular second hand guests. Maybe I have a different view of the relationships since I'm 24 and the average buyer of this yachts is in mid 40's...but I feel really uncomfortable to divide the guests which are supposed to travel with me (in these same yachts there are couches and dining tables for 8 people) in 2 categories.
In many bigger vessels you have 4 cabins in the lower deck and 1 master cabin near the bow (could you tell me the term for "toward the bow"? I don't even know many words in Italian so I can't translate into English!)

This layout is not bad at all, I don't have space shortage in the main deck and I could use more space in the lower deck (for engine room, garage or crew area which are very important areas) but I'd like to have all the cabins in the lower deck.
First, as you said, the higher you go the less stable it is...
Second, I think it's more..... "rational"... I mean, in the lower you have all the cabins and technical areas, on main deck all the dining areas and interior facilities and on the upper and sun deck there are outdoor areas.
Third, as I said, I don't want to give my guests and crew the impression I threat them like "lesser being" by confining them in an area I don't want to put my feet on.

As a possible solution, I took a look at Wider yachts, with hybrid diesel - electric propulsion with the "engine room" moved in the bow. I'm still reading things online about this solution by the way.

Forgive me if I made a wall of text, I hope I didn't make too many errors

 

could you tell me the term for "toward the bow"?
The nautical term is "forward". The opposite of that term is "aft".

 

Thanks mate! I knew aft and I thought there was another technical name for its opposite!