Framing System for trimaran SuperYatch

[ruminame]

I am designing a trimaran superyatch 51m length what kind of framing system should i choose??????????????
can i choose longitudinal framing system?????????
Plz reply guys i am in a hurry................

[gonzo]

Sure, you can choose a longitudinal framing system. Now go start building it. I hope this is fast enough.

[frank smith]

I would use 2x4s , but then I am a carpenter .

[ruminame]

Thnx Guys for ur reply!!!!

[PAR]

If you have to ask this question, then you surely need to hire someone with the skills to engineer 167' structures, which clearly you can not.

Let me put it a different way and ask you a question. "I'm designing a passenger jet with a wing span of 150'. What type of framing system should I use?" Now tell me honestly, if you'd fly in an aircraft where the designer asked these questions.

[joz]

Originally Posted by PAR

"I'm designing a passenger jet with a wing span of 150'. What type of framing system should I use?" Now tell me honestly, if you'd fly in an aircraft where the designer asked these questions.

PAR

I hear paper mache and balsa and PVA glue works well as a structure

[gonzo]

I found that PAR Airlines has great food.

Originally Posted by gonzo

I found that PAR Airlines has great food.

You´re misinformed Gonzo. Though they have bows and arrows for deer hunting after the crash, and some line and tackle, just in case...................

[gonzo]

They gave me a fork and knife and said to look right and left for food.

[PAR]

There's no such thing at PAR Air, you're forced to sign a release upon boarding. Any food stuffs you might encounter along the route is just a bit of good fortune, assuming you survive the sudden stop.

[ruminame]

I am sorry guys if my question bother you.i am a student of undergraduate level in naval architecture in Bangladesh university of Engineering technology.We are well capable of designing mono hull vessel(oil tankers,Container carrier).i was a great fond of fast yacht since my childhood so i decided to take a trimaran in my project.In our country we dont build such vessel.i am the first one to take it.i am trying with my heart & soul to learn about trimaran as much as i can.i searched GL rule book for trimaran frame spacing but found nothing much so i thought u guys can help me.So i asked about it in this forum.
Now i can see this forum is only for the professional not for students.
Thnx to everybody who has read my elaborate explaination.

[gonzo]

There isn't much difference. You calculate as for a monohull, but three times. There will be some calculations for the beams or deck and their attachments. You claim to be designing a superyacht, and that is claiming to be a top Naval Architect in the world. If you want to brag, be ready to be challenged.

[ruminame]

Is it me or is "Bangladesh University of Engineering and Technology" an oxymoron??????
i think it is u.

[MikeJohns]

At 51 m you will be considering global strength, the hull is a girder in it's own right and needs designing accordingly. eg worst case Hog and sag, local pressure, slamming loads.

You can use any framing system you like, intially you'd take the cross section at the greatest bending moment and check the main criteria, such as extreme fibre stress in the deck and hull, allowable deflection, what loads get transferred and where, and a buckling assesment. You'll find that you need transverse frames or bulkheads.

Then add all the local loads, cross beam loads, rig loads, local hydrostatic and hydrodynamic hull loads.

I hope that gives you the picture. The process is just basic naval architecture.

[bhnautika]

Ruminame you may pick up some information from http://www.rina.org.uk/article228.html
There seems to be a growing number of people who are quick with the smart arse comments probably brought on by a weariness having been in the forum for some time. This should not be an excuse, for some people to treat others with disrespect; for many English may not be there first language, so the way they ask a question may not be how they meant to phrase it .