scantling

I’ve been posting here recently about Navacal.com which i created, but there’s a bit of background story to it. Over the past few years, I went back to basics and taught myself small boat design and naval architecture properly through distance learning courses, online resources and books, and a...

Hi all, Quick update about Navacal.com. I have now changed the free trial period from 7 to 30 days to allow users more time to try out all the features of the program Please get in touch if you have any questions Thanks. Robert

Hi All, Just another quick post about my scantling, stability and structural calculation webapp Navacal.com. The program has now been tested by quite a few people covering a whole range of materials and vessel types around the world. There have been a few suggested improvements from users...

Good evening all, I made a post on this forum a few months ago about my new program Scantling & Stability which i've developed, since then I have now changed it into a webapp with a link to the video below and renamed it Navacal. Ive also added the BV NR600 and 467 calculations to it and...

Going Further with Structural Design & Scantling with ISO 12215 This course focuses on ISO 12215, the international standard for determining scantlings in small craft up to 24 meters. A continuation of the previous Structural Design & Scantling course, it expands beyond GPR materials and...

Hi, I usually don't post anything, but I need help for a project for my Finite Element Course, I'm student of Naval Architecture and I need help to analyze a "block" between 2 bulkheads of a steel or aluminum hull under 2 conditions, the problem is that I need at least the scantling in that...

Hi Everyone, I would like to present the tool that I've developped, to assess ISO compliancy of monohull & multihulls, with the ISO12215 standard. 12215 ALIVE ! is a powerfull web app for assessment of Small Crafts with the standard ISO-12215 Design & Scantlings. The standard is translated...

any one know how calcule thiknisse in bv2021 nr 600 hlep

Hi everyone, does someone have experience with the new updated scantling rule? I'm about to start two new projects one 45 and one 50 feet aluminum hull and i wanted hear from you if someone interested help us with some scantlings reports etc. Many thanks Francesco

Hi altruist, I am a student of Naval Architecture. I am week in hull scantling. I can calculate resistance, desired prop, stability and everything, but when I come in hull scantling stage, I messed up hull scantling. I want to study this from beginning. I need your help. Could you please tell...

Hello, I am a student of Naval Architecture. I am doing scantling of midship section. I have calculated section modulus for various member. I have to calculate the dimension of various member from this section modulus. I am badly in need of a chart, where I get the dimension regarding section...

I have simple question about the application of the section modulus formula of LR rules. for a primary members we have a different section modulus coefficient (1/12) adjacnt to the ends and (1/24) at the mid span.this value can make a reduction of about 50% of the SM if we chose the mid span...

Hi, I am developing a spreadsheet for midship frame scantlings. I am struggling with the use of angle for plate stiffening, specifically when it comes to moment of inertia. My notes state that when finding Icl (moment of inertia of the vertical neutral axis), that moment of inertia of vertical...

Hi all, This is real quick and more of a confirmation, the units for section modulus in the ABS are m-cm2. Based on a moment being shown as N-m in the US, I have assumed that m-cm2 is m.cm2 and therefore to convert my section modulus which is in m3 to m-cm2 I need to divide by 10,000? For...

Hello guys, I wanna ask some question about BV Rules "NR 500 Rules for the Classification and the Certification of Yachts". Here I have some confusing mean between primary structure and secondary structure. in my logic: 1. primary supported by primary 2. Secondary supported by primary 3...

Hi, Does anyone know why we are taking the pressure head up to the top of air pipe for the scantling calculation of tank? For sewage tanks, air pipe height is normally more compared to other tanks.So the pressure head will be more and need to design the tanks heavily. Please advise

Hello all, Now I am designing 11,5 m Aluminum Catamaran with maximum speed 10 knots (electric motor propulsion) I am using BV Rules for the Classification and the Certification of Yachts. On this rule, I have some question about the hydrodynamic load (sea pressure & impact pressure on side...

Can anybody help me to determine the dimension of Center Girder, Side Girder, and Floors when I have calculated Section modulus Web cross-sectional area?

Hello everyone, I am designing a pair of composite davits and i am looking for some validation on the design. The davits are intended to carry the following weights -Dinghy (empty) = 77 Kg -Engine (15 HP) = 59 Kg -Fuel tank = 21 Kg This gave me a total of 157 Kg. To this I added the...

Looking at a 1994 Dufour F-39 (maybe the same as the Frers 39, both designed by German Frers) Curious if anyone is familiar with general build specifications on these hulls done in the mid 90's, I can't find any solid info on some of the specs I would like to know; Keel; I'm assuming lead but...