Structural Design & Scantling with ISO 12215

Discussion in 'Education' started by Pablo Sopelana, Jul 18, 2023.

  1. Pablo Sopelana
    Joined: Mar 2021
    Posts: 139
    Likes: 35, Points: 28
    Location: Helsinki

    Pablo Sopelana Senior Member

    Structural design and scantling determination are crucial steps in a vessel’s design process since providing sufficient structural strength is one of the main objectives when designing floating devices. Moreover, they also affect other aspects of a vessel, such as resistance and stability. By completing this course, you will be able to design the structure of a boat, understand the ISO 12215 norm and the fundamentals behind it, and apply this norm to evaluate the scantling of either motorboats or sailing yachts.

    Structural Design & Scantling with ISO 12215
    Structural Design & Scantling with ISO 12215 https://navalapp.com/courses/structural-design-and-scantling-with-iso-12215/





    What will you learn?
    In this course, we equip the students with the knowledge and tools required to understand and perform Structural Design & Scantling with ISO 12215. Besides, the course provides numerous examples and downloadable calculation templates where the students can see how the calculations are done (very useful for understanding & learning), analyze the results, and use them on their projects.

    The course is divided into three parts:

    1. The first part presents a theoretical study of the strength of materials and theoretical considerations regarding the structural design and scantling process.
    2. The second part explains the ISO 12215 Standard, including its structure, the rules established to compute design pressures, and the formulae for scantling determinations. Some aspects will be treated separately, such as the rudder, the keel, and the rigging.
    3. Within the third part, the knowledge acquired in parts 1 and 2 is applied to perform practical examples over a 17m length GPR sailboat, such as the calculation of:
    • Composite properties.
    • Monolithic panels.
    • Sandwich panels.
    • Stiffeners.
    • The rudder with ISO 12215-8.
    • The keel with ISO 12215-9.
    • The rig with ISO 12215-10.
    After completing the course, you will be able to design the structure and evaluate the scantling of yachts and boats by applying the ISO-12215 standard. Speaking more precisely, you will be able to:

    • Understand the fundamentals of the science of strength of materials behind the formulae and procedures described in the ISO 12115 standard.
    • Understand the fundamentals of the structure definition process, including the different types of structural elements to be considered, the types of structures, and notions about the building process.
    • Design the structure of yachts and boats.
    • Use the ISO 12215 standard to compute the properties of composite materials.
    • Determine the design pressures to be considered in the scantling process according to the ISO 12215 standard.
    • Determine the scantling of panels (thickness) and stiffeners (sections) in the different areas of the hull according to the ISO 12215-5 standard.
    • Determine the scantling of the keel and the rudder of sailing yachts according to the ISO 12215-8 and ISO 12215-9 standard.
    • Calculate the structure of the rigging of sailing yachts according to the ISO 12215-10 standard.
    Course organization
    The course is video-based and on-demand and can be followed at your own pace.

    It contains videos, quizzes, and downloadable documents and gives access to the course’s classroom, a virtual place to interact with the instructors and fellow students.

    Students completing the course will obtain the Course Certificate.

    – Resources:
    • Video lessons.
    • Materials (Pdf and Excel files).
    • Quizzes.
    • Course Certificate
    – Classroom:
    • Virtual classroom.

    Welcome aboard and enjoy the course!
     
    Last edited: Jul 19, 2023
    Ad Hoc likes this.
  2. TANSL
    Joined: Sep 2011
    Posts: 7,725
    Likes: 839, Points: 123, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

  3. Pablo Sopelana
    Joined: Mar 2021
    Posts: 139
    Likes: 35, Points: 28
    Location: Helsinki

    Pablo Sopelana Senior Member

    In the course (Structural Design & Scantling with ISO 12215 https://navalapp.com/courses/structural-design-and-scantling-with-iso-12215/), we equip the students with the knowledge and tools required to understand and perform Structural Design & Scantling with ISO 12215.

    After completing the course, the students will be able to design the structure and evaluate the scantling of yachts and boats by applying the ISO 12215 standard.

    You don't need any scantling software! The course provides numerous examples and downloadable calculation templates you can use on your projects.

    Moreover, every template is explained in detail, and you will learn the hows and the whys of the calculation process and computations (no black boxes). You will develop the knowledge to understand what you are doing, help you make decisions, analyze the results, and create your own tools.

    Introduction to ISO 12215:

     
    Last edited: Jul 22, 2023
  4. TANSL
    Joined: Sep 2011
    Posts: 7,725
    Likes: 839, Points: 123, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    Our course : Scantling for Boat Constructions | Udemy

    - It is a totally efficient tool to solve, to a large extent following ISO 12215, most of the problems that the calculation of the ship's structure poses to the naval designer.
    - It is aimed at designers without extensive knowledge of structural calculations but those who wish to use sophisticated calculation techniques, have a simple and quick way to obtain design pressures and allowable loads that, no matter how sophisticated their calculations, must take into account.
    - It is led by tutors with extensive experience in teaching and vast practical experience in ship design (dozens of calculated ship structures, real ships that navigate various seas around the world).
    - The student takes the course at their convenience and can contact the tutors at any time to resolve their doubts in a totally personalized way.
    - We have developed a software based on ISO 12215 Standard, which has given us a deep knowledge of it, that few tutors can offer.
    - The student is provided with a free license of our software, which he can use to develop the examples of the course, until its completion.
    - Explains ISO 12215, correcting existing errors in these standard.
    - We do not give an "introduction to ISO 12215" but we explain everything that students need to know about it, in the depth required in each case, to ensure that they will be able to fully outline their designs.
    - Provides calculation procedures for multiple elements or areas of the ship not covered by the standard:
    o Transom for sailing boats
    o Transom motor boats:
    • Traditional axle line
    • Outboard motors of more and less than 100 kW of power
    • Waterjet
    • Stern drive
    o Main engine mounting.
    o Floors
    o Cantilever structures with only part of their embedded sides.
    o Calculation of the various non-structural elements existing on board.
    o Determination and justification of welds on metal hulls.​
    - We avoid the student having to carry out cumbersome uncreative calculations. Assuming that the student knows how to add, multiply and apply formulas, we focus on providing solutions to the various problems that arise when analyzing calculations.
    - But, if the student decides to carry out some calculations manually, our application offers him all the list of coefficients and partial results that he should have used in each of his calculations. In this way the student checks his calculations and discovers where he may have gone wrong.
    - There's no need the use of spreadsheets, nor "calculation templates", to solve certain, and limited in number, assumptions, but our software allows us to undertake any case that may arise in a structure.
    - Persistently we insist on the analysis of the results and how to correct them. This is where we most use, and explain, the theoretical knowledge necessary to adopt the optimal solution.
    - Our application indicates in all cases the properties of the structural element that do not meet the minimum required by the standard.
    - There’s not need to use quizzes, but we propose real exercises to the student. The student can, and is asked, to propose his own solutions and discuss them with his tutor.
    - Our texts are just a guide for scantling a hull, a guide that the student can follow or propose their own solutions. Our fully personalized attention to students allows us to get out of the confinement of a rigid and uncreative course.
    - We use our vast practical experience to give the calculations a totally targeted approach to the specific boat builder.
    - This course teaches an eminently practical scantling procedure always focused on the construction of the boat. For this reason, ISO 12215-6 is very present in all our designs, with a specific module in our software.
    - The course teaches how to optimize a boat from the point of view of saving weight or reducing labor.
    - We teach how to make scantling drawings, obtaining, through our application, a complete Report with all the elements, factors and coefficients, used and results obtained.
    - It is not a question of a few examples but of the complete scantling of a sailboat.
    - As auxiliary material, the texts and complete figures of the course are provided in pdf format.
    - Each and every one of the calculations or examples proposed in the texts are collected in our modern format, with videos (more than 90 videos) and HTML files. In this way, the student can "navigate" through the course at will through links that quickly direct him to consult the desired topic. A very careful, professional, modern, agile and entertaining presentation

    Visit our website and enjoy the original course. Copies were never good.
     
    Last edited: Jul 21, 2023
  5. Ad Hoc
    Joined: Oct 2008
    Posts: 7,963
    Likes: 1,831, Points: 113, Legacy Rep: 2488
    Location: Japan

    Ad Hoc Naval Architect

    Nice little video with simple voice over - explains the objective clearly.

    Obviously i haven't seen your course material, but you need to make students aware of the Loadline rule, when talking about sub 24m length vessels.
    Im not wholly sure how ISO defines "length", as I don't use ISO....but I suspect it may not reference the Loadline rule. ...but i stand to be corrected if it does; since i have no need for ISO rules.
     
    Pablo Sopelana likes this.
  6. Pablo Sopelana
    Joined: Mar 2021
    Posts: 139
    Likes: 35, Points: 28
    Location: Helsinki

    Pablo Sopelana Senior Member

    Thanks @Ad Hoc , your inputs are very much appreciated. I will review your comment on the Loadline rule with the course instructors.

    We are very excited about the course (Structural Design & Scantling with ISO 12215 https://navalapp.com/courses/structural-design-and-scantling-with-iso-12215/). We believe it brings a lot of value.

    Our single mission with the course is to equip the students with a deep knowledge of small craft structures, ISO 12215, and associated scantling calculations so that they know the subject in and out and under the hood, they understand the what, the how, and the why of what they are doing, and they can take their own well-founded decisions when confronted with their own projects.

    Also, with this course, students don't need any scantling software as we don't want to impose on the students any software, and much less we are teaching the subject with the (hidden) hope to eventually convert students into paying customers of any software. This is why we are free to explain all the subjects without restriction, and we don't hide from students any of the knowledge. By this very same fact, neither the explanations of the course are restricted to a mere "introduce the data in this box and then click on this button" approach, as is usually the case when you are explaining software. In fact, we did use scantling software on the original Scantling course we launched more than one year ago (today, this course has been discontinued), collecting not very positive feedback from our students, on both, their experience with the software itself and the learning.

    Instead of software, we provide the course with numerous examples and downloadable calculation templates. We are launching the course with a lot of them, and we also plan to periodically update the course with new templates and content. The templates are also explained in detail and the students can consult the formulae (very useful for understanding & learning). Students can also use these templates in their own projects. Our ultimate wish here would be to create (or help to create together with others) an Open Source Scantling Software open for anybody to use and contribute. If anybody is interested in this ... let me know.

    Regarding the topic of ISO 12215, part 9, we have lately launched on our website an article that you may find interesting (https://navalapp.com/articles/bolt-diameters-of-bolted-keels/).

    Also, together with the Structural Design & Scantling with ISO 12215 course, we are launching in parallel a course on Composite Materials you may be also interested in checking (Composite Materials 1 https://navalapp.com/courses/composite-materials-1/). We also feel very excited about this course!



    Many thanks @Ad Hoc again!
     
    Last edited: Jul 22, 2023
  7. TANSL
    Joined: Sep 2011
    Posts: 7,725
    Likes: 839, Points: 123, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    @Pablo Sopelana, we are both the best, without a doubt (especially since the origin of both courses is the same, my texts), but we will see what our students think about our courses and about their instructors. There is no better review than theirs.

    Regarding our software, the opinion of the many professionals (not students) working with it is worth more than the feedback of your students, in my humble opinion. And, please, do not make insinuations in relation to what are the intentions of others. Be honest and speak or give your opinion about concrete facts that you know. Start practicing honesty in your comments. The lie has very short legs.

    We do not intend to sell our software thanks to the course. We intend to prevent the student from spending hours and hours multiplying and dividing so that he can focus his attention on optimizing the structure, it is not our mission in this life to improve his ability to calculate algebraically. If he wants to do some calculations by hand, our software will help him to validate them. If at the end of the course he is interested in acquiring a software that saves him all those hassles, there are at least 2 on the market that do the same, or similar (not to mention your free templates).

    How many templates will you have to create to respond to all the problems that may arise during the process of calculating a structure. The answer is, a lot, if you only deal with GRP hulls, but if you are talking about FRP hulls, wood (in its many variants), metal, HDPE, mono and multi hulls, motor and sail, the answer is : too many to make them viable and practical for the designer (and, furthermore, how long they will need to wait until you supply them). But, of course, someone who doesn't know what he doesn't know can risk giving simpler and more misleading answers than someone who knows the subject he is dealing with.
    (I don't like intruders and I will always try to defend my profession and my work from them and expose them).
     
    Last edited: Jul 22, 2023
  8. Ad Hoc
    Joined: Oct 2008
    Posts: 7,963
    Likes: 1,831, Points: 113, Legacy Rep: 2488
    Location: Japan

    Ad Hoc Naval Architect

    If you need/require any clarification on the LL rule, please do not hesitate to ask...

    Good luck with it.
    I have taught at post graduate level, so I know a lot of preparatory back ground work is required for teaching... so good luck.

    In my experience you need to separate rules from practice.
    Many people can and do learn rules of structures using the said rules. But very very few actually 'understand' structural design...the practice of the theory one is taught.
    Having examples of boats etc...is good and does lend itself to degree of understanding 'practice'. But understanding how structures "work"...and why..is the key to being a structural designer, of sorts.

    Good luck.
     
    Pablo Sopelana likes this.
  9. Ad Hoc
    Joined: Oct 2008
    Posts: 7,963
    Likes: 1,831, Points: 113, Legacy Rep: 2488
    Location: Japan

    Ad Hoc Naval Architect

    Then you will have a hard job explaining to whomever is using your software - what optimisation means.

    So you're only teaching users how to use rules...which are the ISO, using a software developed for the course?

    This appears to be just a quick method for someone the learn ISO rules (rather than reading them themselves), and not much else.

    Structural design is not a 5min job,..and using rules is the last final step in structural design..not the first!
    Since the rule, is merely a measure of compliance, nothing else.
     
  10. Ad Hoc
    Joined: Oct 2008
    Posts: 7,963
    Likes: 1,831, Points: 113, Legacy Rep: 2488
    Location: Japan

    Ad Hoc Naval Architect

    Sad, but is does appear history keeps on repeating itself, as noted here by ONE of many such comments.
     
  11. TANSL
    Joined: Sep 2011
    Posts: 7,725
    Likes: 839, Points: 123, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    Ad Hoc, I cannot agree more, in general, with what you say in your post #8 and #9. I am glad that a person as important as you thinks, in several points (not all) something similar to what I think. It saddens me, however, to see that if you had read carefully (and humbly) the things that I have explained, you would have saved yourself, and to us, some comment.
    Thank you, Ad Hoc, for your always positive, encouraging responses, even sometimes on topics you are totally unaware of. Thanks again, your comments help to visualize our courses because the people who follow you, which is quite a lot, will be interested in knowing more about them, to draw their own conclusions regardless of comments, usually not very objective. ;)
     
    Last edited: Jul 23, 2023
  12. Ad Hoc
    Joined: Oct 2008
    Posts: 7,963
    Likes: 1,831, Points: 113, Legacy Rep: 2488
    Location: Japan

    Ad Hoc Naval Architect

    Thank you again for your usual projection of your own thoughts onto others.
    Since you are actually referring to yourself..not others.

    I have no idea how many follow me, and it matters little.
    But..if there are any.... and they do..then they shall see the childish narcissistic comments, I also see.

    'tis funny how you deleted your own thread, citing how you dislike and find unprofessional when others post on your threads hijacking it..as you cited.
    But we can't...as you deleted it!

    QED.

    If you wish to post about your software and claims, then please do so on your own thread.

    Then lets others post on this thread about this software by Pablo Sopelana on his thread.
    Thank you.
     
    Pablo Sopelana likes this.
  13. TANSL
    Joined: Sep 2011
    Posts: 7,725
    Likes: 839, Points: 123, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    Thanks, Ad Hoc, one more time, but why don't you inform yourself correctly before speaking?. You make statements based on your own assumptions (facts!, facts! as a great friend of mine bellows) and that is not right, it is not honest.
     
  14. Alan Cattelliot
    Joined: Jul 2021
    Posts: 519
    Likes: 216, Points: 43
    Location: La Rochelle (Fr)

    Alan Cattelliot Senior Member

    If I may recall something very important about the title of this thread, that could mislead some users of this forum : Down below an extract of ISO12215:2019 Small craft — Hull construction and scantlings — Part 5: Design pressures for monohulls, design stresses, scantlings determination

    INTRODUCTION :

    " This document is intended to be a tool to determine the scantlings of a craft as per minimal requirements. It is not intended to be a structural design procedure.
    It is also emphasized that this document should only be used to check the main structural features of a craft but should not be used as a scantlings guide."
    It would be a total mess to "design with the ISO standard". No serious naval architect or designer would do it that way. The only thing that can be done with the standard is making assessments according to the standard. That's it. In addition, one shall keep in mind another important point, also given in the introduction of the standard :

    INTRODUCTION :

    "Users of this document should have practical and theoretical experience in strength of materials and engineering, even if calculation software are available."
     

  15. Pablo Sopelana
    Joined: Mar 2021
    Posts: 139
    Likes: 35, Points: 28
    Location: Helsinki

    Pablo Sopelana Senior Member

    Thanks all for the comments and inputs.

    Just a small post to confirm that, for those who may be interested, the Introduction ISO 12215 video I posted above is now available on our YouTube Channel:
    https://www.youtube.com/@navalapp

    Thanks!

    [​IMG] Hi,
     
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.