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Latest on RKALC

16/3/2025

Revolutionising Structural Engineering with AI: Meet FEAKalc!

The Tesla of Structural Engineering

The future of structural analysis and design is here—and it's becoming hands-free!
At RKALC, we're redefining the way engineers interact with Finite Element Analysis (FEA). FEAKalc is not just another software; it's an AI-driven engineering assistant that eliminates tedious manual input and transforms structural modeling into a seamless, intelligent process.
🔹 What is FEAKalc? FEAKalc is AI-powered structural analysis platform that allows engineers to:
✅ Describe their model in natural language – “Draw a 2-bay portal frame with 6m bays and 4m high columns” – and watch it take shape instantly.
✅ Apply loads effortlessly – No more manual entry! Just say, “Apply a 50kN/m UDL to F1 and 75kN/m to F2 under LC1.”
✅ Generate complex structures in seconds – From continuous beams to Warren trusses, FEAKalc automates model generation with AI precision.
✅ Integrate FEA seamlessly – Run analysis with a simple command: “Analyse” and let the AI handle the rest.
Think of RKALC as the Tesla of structural engineering – intelligent, automated, and game-changing.
🔹 What’s Next?
We’re pushing the boundaries with:
đź“Ś AI-powered truss and frame optimisations
đź“Ś Automated load distribution for wind & seismic
đź“Ś Hands-free generative design recommendations
💡 The age of AI-driven engineering is here. Are you ready to embrace the future? Join us at RKALC and be part of this revolution! 🔥🚀

#StructuralEngineering #RKALC #AIinEngineering #AS3600 #AustralianEngineering #ConcreteDesign #RKALCAssistant

15/3/2025

Calling All Educators & Students: Get Free Access to FEAKalc!

Hey friends, if you're part of an educational institution and want to experience the future of structural analysis or simply try to verify your analysis, we’ve got great news for you! 🎓🚀
We’re offering free access to FEAKalc for students and educators from Australian universities and worldwide institutions—as long as you have a valid .edu, .ac, or .gov email domain.
đź“Ś What is FEAKalc?
FEAKalc is a structural analysis tool designed to make learning structural behavior, FEA, and engineering principles faster and more intuitive. Whether you're:
âś… Learning structural mechanics and finite element analysis (FEA)
âś… Teaching engineering concepts and need an interactive tool
âś… Researching new approaches to automated design and analysis
FEAKalc is here to simplify complex calculations and bring engineering education into the AI era!
đź’ˇ If you're interested, reach out to us at admin@rkalc.com to get set up!
Let’s build the future of structural engineering—together! 🚀
FEKalc Image
9/3/2025

AI-powered design is no longer the future—it’s happening right now with RKALC Assistant.

Real Life scenario:
🔹 We fix the verticals at 200mm thick due to layout constraints.
🔹 We ask RKALC Assistant to determine the required depth for the section—it calculates 2750mm in seconds.
🔹 We then ask, "How many levels can this support?"—it responds 17.
🔹 Finally, we ask, "What if it were a square section?"—RKALC instantly suggests 632mm.
🔹 we could have asked, what would be the MPa that works for x size?
All of this in just a few minutes—a process that would typically take far longer with traditional tools and manual iteration (by someone who got the experience)
RKALC Assistant is evolving rapidly to be your AI-powered engineering companion, streamlining the entire design and analysis process.
Mind-blowing updates are rolling out soon—stay tuned!
RKALC Assistant Image
2/3/2025

AI-Powered RKALC Assistant for STM Wall Design

We are excited to announce the latest evolution of RKALC Assistant, now integrated into the STM Wall Design app! This is more than just another AI tool—it’s your engineering companion, designed to make Strut-and-Tie Method (STM) wall analysis faster, smarter, and more intuitive.

What’s New?

  • AI-Powered Responsiveness – Instant feedback, real-time calculations, and seamless user interaction.
  • Intelligent Optimisation – Ask for the optimal wall thickness, reinforcement placement, or node geometry, and RKALC Assistant will find the best solution in seconds.
  • Practical Engineering Insights – Get meaningful responses, not generic AI-generated text. Whether it’s node equilibrium, reinforcement layout, or stress distribution, RKALC Assistant understands your design challenges.
  • Faster Decision-Making – Need answers on-site or in a meeting? Just ask, and RKALC Assistant will give you clear, precise responses.
A Smarter Way to Design with STM

The Strut-and-Tie Method is essential for handling walls, corbels, deep beams, and D-regions, but it often requires manual iteration and detailed checks. RKALC Assistant simplifies this process:

  • “What is the optimal wall thickness for this load?” – Instant answer.
  • Y “Make the bottom node deeper to fit reinforcement.” – Done.
  • “Is my strut angle within STM guidelines?” – Get clear feedback.
  • “Can this wall take more load?” – The Assistant will optimise it for you.
Not Just AI—Your Structural Engineering Mate

RKALC Assistant is built for engineers. It understands the real-world challenges of STM design and provides actionable solutions, not just theoretical answers. Whether you’re in a high-stakes project meeting or refining designs in the office, RKALC Assistant makes sure you have the answers when you need them most.

Try RKALC Assistant Now
23/2/2025

Introducing RKALC Assistant – Your AI Mate for Smarter Column Design!

AI on its own is just a language model. But with RKALC, it transforms into your structural engineering mate, giving you the answers you need, exactly when you need them.

What is RKALC Assistant?

RKALC Assistant is an AI-powered engineering assistant built to make your column design process smoother, faster, and more efficient. Whether you're a practising engineer, consultant, or student, RKALC Assistant understands the way you work and bridges the gap between design and decision-making.

Real-World Scenarios – When You Need RKALC Assistant
  • You're scheming a new building and need to explore all possible column options: square, blade, circular, varying heights… You ask your mate to do the research and report back tomorrow. RKALC Assistant does it in minutes.
  • You're on a train heading to a high-stakes project meeting. The columns are super slender, and you need alternative designs—fast. RKALC Assistant delivers instant calculations
  • The architect asks: "What’s the minimum circular column that works for this level?" Then follows up: "How about rectangular? What’s the thinnest blade we can use?" RKALC Assistant has the answers.
What Can RKALC Assistant Do?
  • Optimise Your Column Design – Find the best size, reinforcement, and strength for maximum efficiency.
  • Instant Calculations & Checks – Modify width, depth, or reinforcement and get immediate feedback.
  • Analyse Utilisation & Slenderness – Quickly assess if your column is under or over-utilised.
  • Interactive AI Chat – No fluff, no generic AI talk—just practical engineering answers when you need them.
Why RKALC Assistant?
  • It’s not just AI—it’s your engineering mate. RKALC Assistant doesn’t just generate answers—it understands how structural engineers work
  • Faster, Smarter Design Decisions. No more trial and error—get precise, optimised solutions instantly.
  • No Guesswork, No Wasted Time. RKALC Assistant helps you refine your design with confidence.
  • Built for Structural Engineers. It’s tailored for Australian Standards (AS3600) and real-world applications.
Try RKALC Assistant Now

RKALC isn’t just about software—it’s about empowering engineers with the best tools. Let us know what you think! 🎉

#StructuralEngineering #RKALC #AIinEngineering #AS3600 #AustralianEngineering #ConcreteDesign #RKALCAssistant

25/1/2025
PTKalc Beta Is out!

Excited to share PTKlac, a groundbreaking web application for analysing and designing continuous beams, including post-tensioned beams. 🌍
Key features:
âś… Intuitive, user-friendly interface
âś… Real-time load balancing and analysis
âś… Seamless integration with the RKALC suite (FEAKlac, Beam Designer, and more)
âś… Cloud-based storage for secure, anywhere access
âś… Designed for Australian Standard AS3600-2018, with global standards coming soon
Join over 490 active users leveraging PTKlac to streamline their structural engineering projects. Affordable, innovative, and built for engineers by engineers.
Discover how PTKlac and the RKALC suite can transform your workflow. Start today and experience the future of structural engineering. đź’ˇ #StructuralEngineering #Innovation #BeamDesign #PTKlac #RKALC
- 7/10/2024
PTKalc


- 18/8/2024
Parametric Design? No Problems!


- 27/1/2025
Q&A
Welcome to the RKALC Engineers' Q&A Forum!

At RKALC, we believe in fostering a collaborative environment where engineers can learn from one another, share knowledge, and solve challenges together.
Our Engineers' Q&A platform provides a space where professionals in the field can ask insightful questions and share their expertise on a wide range of engineering topics.
Whether you're seeking advice on complex technical issues, discussing industry trends, or looking to troubleshoot specific challenges, this forum is here to support you.
Ask a question, offer your insights, and engage with a community of like-minded professionals committed to innovation and excellence in engineering.
Let’s build better solutions, together.


- 6/8/2024
What does AI Think of FEAKalc?

Question: do you know FEAKalc?
Answer By ChatGPT
FEAKalc is a tool within the RKALC suite designed for structural engineers to perform finite element analysis (FEA) on 2D structures. It is particularly useful for analysing the structural behaviour of elements under various loading conditions, helping engineers to understand how different parts of a structure will respond to stresses and strains.
This tool allows users to model and analyse complex structures by breaking them down into smaller, manageable elements. The results can provide insights into displacements, stresses, and forces, aiding in the design and validation of structural components.
FEAKalc is integrated into the RKALC ecosystem, which means it works alongside other calculators in the suite to provide a comprehensive set of tools for structural analysis​
Answer By Gemini
Yes, I know about FEAKalc!
FEAKalc is a web-based application developed by RKALC for structural analysis. It's designed to be user-friendly and efficient, allowing users to analyse frames, trusses, and other structures quickly and easily.
Key features of FEAKalc include:
  • Ease of use: It's designed to be intuitive, even for those familiar with software like SAP or ETABS
  • Speed: FEAKalc is known for its rapid calculation times
  • Accessibility: As a web-based application, it can be accessed from any device with an internet connection.
  • Comprehensive: It handles a variety of structural analysis tasks.


  • FEA Kalc Watch and Learn

    - 4/8/2024
    Calculation Reports

    We are delighted to announce the rollout of detailed calculation reports across most of our web-based modules!

    What’s New?
    Our Column Module, STM Wall Module, Corbel Module and Coupling Beam STM Module now feature comprehensive calculation reports that adhere to the latest standards, ensuring accuracy and professional presentation . These reports include analyses, formatted tables, and insightful notes to support your engineering projects..

    Key Features:

    • Compliance with AS3600-2018: Our calculation sheets now follow the Australian Standard 3600-2018 guidelines, incorporating load-bearing capacity, moment-resisting capacity, and confinement provisions to ensure FRL structural integrity under the given load combination.
    • User-Friendly Design: The reports are designed with readability in mind. They feature clearly formatted tables and intuitive layouts, making it easier to understand and verify the calculations.
    • Enhanced Print Features: Print your reports with a professional layout, including a grid notebook background for better readability and notation.
    • Interactive Elements: Detailed tables for Weak Axis and Strong Axis analyses, Applied Forces, and Global Behaviour, ensuring a comprehensive understanding of your column’s performance.
    • Expert Notes: Valuable insights and notes on compliance and design considerations, ensuring you stay informed about the best practices and standards in column design.

    How to Access:
    Visit our Column Module and STM Wall Module and Coupling Beam STM Module and Corbel Module to explore the new features and generate your detailed calculation reports.

    Stay tuned for more updates and enhancements as we continue to improve our tools to support your engineering needs!

    - 28/7/2024
    RKALC Update

    A heartfelt thank you to our 400+ members in Australia and around the globe for your incredible support over the past two years.
    We’re excited to announce that RKALC has now transitioned to a paid model, offering you the flexibility to subscribe to the web application(s) of your choice.
    We’re currently offering a one-time subscription plan that’s valid for 30 days. You can select the apps you need and subscribe for just one month, with the option to renew if you’d like. Enjoy the convenience of no lock-in contracts or recurring payments with these plans. Plus, keep an eye out for future subscription options that will come with discounted rates.
    Please note, current prices apply only for the duration of your subscription.
    You can complete your purchase using your PayPal account or credit card, with all transactions securely processed through PayPal, the world’s leading payment gateway. Rest assured, we don’t store PayPal accounts or card details.
    Thank you for your continued support and we look forward to serving you with our enhanced offerings!
    Warm regards,
    The RKALC Team

    New members will receive a complementary 7 days welcome package with full access to the RKALC cloud-based applications.

    Happy RKalculations!

    - 1/4/2024
    GreenKALC is Out

    Our latest webapp, The GreenKALC, is out
    This is a unique piece of work enables you calculate the carbon footprint of your building. There are tables breaking down the building into sections, this makes it easy for you to fill in, and choose the right material to reduce cradle to gate emissions.
    Warm regards,
    The RKALC Team

    - 1/3/2024
    Q&A

    Welcome to our Q&A Page!
    This is the space for structural engineers to ask questions and answer others. We have added many questions for our members to share knowledge and trigger more discussions in the public. We are receiving questions and thought some might be shared to spread the knowledge


    RKALC Structural Engineering Apps




    FEAKalc

    This our latest and most advanced web-application for structural analysis, you can analyise any frame, truss, and anything in between. This is a rapid and super easy application, soon will include international sections.

    Access FEAKalc »

    GreenKALC

    GreenKALC is your tool to estimate the carbon footprint for your building. You can, using this app, work out the quantities and A1-to-A3 carbon emissions. Helps you reduce the impact on environment

    Access GreenKALC »

    RC Calculator

    Learn all there is to know about the concrete calculator, specially crafted for the Australian Standard AS3600-2018. This application is made to help expedite the process without compromising accuracy.

    Access RC Calculator »

    STM Calculator

    This is an absolutely amazing application, will help you rapidly design transfer beams / walls, using the strut-and-tie method to AS3600-2018. You can see how it generates state-of-art output in no time.

    Access STM Calculator »

    Steel Calculator

    The steel calculator is here! Say goodbye to paper catalogues or giant PDF files to find the properties and capacities of steel sections. This is a true time saver, made for the standard Australian sections

    Access Steel Calculator »

    Analysis Verifier

    This is all what you need for continuous beams / slabs in real life, or if you are working with a sophisticated software and need to get a feel of what it is doing! A great tool to verify software results, and a little bit more

    Access Analysis Verifier »

    TribKALC

    This is our new web that you will need to calculate tributary areas with graphical representation, only thing to do is to open pdf file of floor plan, and trace around slab edge, columns, and walls, click analyse (on the brain icon).

    Access TribKALC »

    CentresKALC

    This is our unique webapp that you will need to calculate Centres of Mass and Rigidity with graphical representation, only thing to do is to open pdf file of floor plan, and trace around slab edge, and walls, click on the brain icon.

    Access CentresKALC »

    PileGroupKALC

    This is our unique webapp comes with dynamic and easy to use graphics pad. It is waht you will need to estimate pile group reactions to vertical and lateral loads. Super fast and easy to use similar to its sister apps, TribKALC and CentresKALC.

    Access PileGroupKALC »

    MasonryKALC

    This is our latest webapp for the design of masonry walls to the Australian Standard AS3700-2018. Your can design walls made of clay bricks, concrete, light weight concrete, and calcium silicate. Design for axial, bending, shear, and fire

    Access MasonryKALC »





    Welcome to RKALC Blog


    RKALC Diamond - Q & A

    Hi everyone, got an interesting observation on RKALC Diamond, at this link RKALC Diamond
    Q
    "I had a question in regards to your Bearing Theory for Column Transitions.
    In regards to A1 and A2, How do you calculate A2 as AS3600 notes that A1 and A2 should be geometrically similar yet from your analogy it doesnt appear they are?"

    A
    The A1/A2 analogy originates from ACI . This analogy is essentially used to disperse stress from a smaller area (A1) to a larger area (A2), as the surrounding concrete confines. The stress limit on A1 can be increased by the factor (A2/A1)^0.5, but not beyond a factor of 2, or ultimately the upper bound of factor*fc, as this is the maximum crushing or squashing stress concrete can withstand.
    ACI does not specify a depth for the dispersion prism or frustum, except in cases where the underlying area is limited, such as a column near an edge. In such cases, the dispersion depth (or A2) should be limited by, or stops at if you wish, at the discontinuous edge.
    Consider an exaggerated case where the drop panel’s depth is as tall as a full storey. In such a scenario, we could imagine a “geometrically similar” area, A2, created by constructing 45-degree lines from the four corners of the columns to the planar limits of the drop panel. This setup could theoretically achieve an enhancement factor of 2 if the drop panel in plan is only about 75 mm larger all around (for a 200x100 blade).
    Although we might argue this fits within the code’s lingo for any drop panel depth, it doesn’t align with the first principles or the fundamental intent of this clause—namely, stress dispersion or spread assisted by confinement. Stress dispersion within the drop panel limits can be easily verified using finite element models.
    We would like to think of this problem as two columns pushing against the drop panel, shooting beams of light or stress, and these intersect at a new area within the middle depth of the drop panel, making a diamond shape, this make a lot more sense.
    On a related note, the AS3600 standard suggests a concession for stepped or sloped surfaces, allowing A2 to be defined as “the area of the base of the largest frustum of a right pyramid or cone.” How should we interpret this? Could this be viewed as removing the requirement for geometric similarity? Interpretation is left to the reader.
    More generally, the code itself is nothing but guide, and responsibility of the design lies at the structural engineer’s judgement. In all cases, we clearly mentioned that this tool is a complementary bearing check, and we recognise that this theory may be open to challenge. However, it is not a replacement for the strut-and-tie analogy; both theories, introduced by RKALC, aim to assist the engineering community.
    One could adopt an extremely conservative approach by considering the small square area between two columns and applying the stress directly to it. However, this approach would only be practical for very large columns and would effectively eliminate the need for a drop panel altogether, provided the column is confined enough to take the stress concentration. Technically, there is nothing wrong with this approach.



    The Tale of Two Building Developers:

    Navigating Urban Landscapes Through Architecture and Structural Engineering

    This article is inspired by Bill Baker's address to DTU University in 2015. You can watch the address here.

    Iris Bay Dubai

    The architecture, is the story of space and time, it is about fashion, colors, natural light, and nice views. It is also about a fresh breath of green and positive interfacing with the community, all of which pour in pride of owning an apartment in a landmark building.

    On the other hand, structural engineering is the language of architecture; it is the words or vocabulary through which architecture is written. Some of this "vocabulary" is quite eloquent and makes a powerful impact, as seen in the Sydney Opera House here in Sydney, or the Burj Dubai. Others stumble, like those rectangular apartment buildings we see everywhere, the majority of which are designed by nothing but greed. I am not quite sure if there is ever architecture in those other than complying dimensions or sometimes performance solutions. I only see rectangles stacking next to each other, above each other, to form giant rectangles, or sometimes trapezoids when the land has such shape.

    Let us face it, there is a huge need to grow, and a great demand by our communities to expand and aspire. At the same time, we live in a world of limited resources and increasing awareness of human's footprint on the environment and nature. That said, can we not agree on common grounds? And when I say "we," I mean us in the built environment, the architects with the developers at their back, and the structural engineers, the deliverers of the whole vision.

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    Peter Rice - An Engineer Imagines!

    Although I’ve been in the business of structural engineering for over two decades, and despite being a chartered member of IStructE, a UK accreditation body, I only knew about the Irish Structural Engineer, Peter Rice, a few years ago! I said to myself, alas! What am I doing? This rush in doing work and attempting to be up to speed with industry commitments made me miss great things… This dilemma of balancing between acquiring knowledge while servicing clients and employers keeps coming up along the way, and whenever I meet a great mentor or know about an inventive piece of work.


    Euler Load Image 1

    I remember experiencing similar feelings early on when I knew about Nervi, Fazlur Rahman Khan, Ove Arup, Frei Otto, and even some of the living superstars like Bill Baker and Robert Sinn, however, Peter Rice struck me the most!

    For those who don’t know him, it can be safely said that he was, and still, one of the greatest minds in structural engineering, a true thinker and compassionate human being who invented so many beautiful things that we take for granted.



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    To FEA or Not to Be!

    It would be good to start these reflections with the following quotes (Wilson, Jan 2002):

    [My freshman Physics instructor dogmatically warned the class "do not use an equation you cannot derive". The same instructor once stated that "if a person had five minutes to solve a problem, that their life depended upon, the individual should spend three minutes reading and clearly understanding the problem"..."With respect to modern structural engineering, one can restate these remarks as "do not use a structural analysis program unless you fully understand the theory and approximations used within the program"]

    It has been quite a while since starting my career; through which, I have attempted, or more precisely, life has taken me across a number of challenges, in a pursuit for engineering excellence that I hope would be reached one day. One of these dares is trying to track, or maybe confirm, the actual development in structural engineering, in light of the astronomical advancement of #CAD / #FEA and debate of responsibly deploying them. A debate usually witnessed among young and “older” professionals.

    Let us imagine a journey in time, no farther than the late 1970’s; maybe similar discussions on the analysis and design aids were, as well, very much on the table. .


    Euler Load Image 1
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    Reinforced Concrete Columns

    Designing columns is possibly the most repetitive task structural engineers undertake in their daily routine. When we have a column subject to combined axial and bending, one might ask the following questions:

  • How slender is this column?
    Slenderness of any column is the single most important parameter we should determine at the beginning of the design task. As a rule of thumb, if the column is braced, then a height to width ratio (or slenderness) under 15 should make an axially loaded column fail at a loading nearing the squash load, i.e., the capacity of the section. Whereas in unbraced floors, the height to width ratio should not be any greater than 10; otherwise, failure will happen quickly on buckling way before the section capacity is suffering.

  • Show More

    The Strut and Tie Method

    STM is a very efficient and simple way to represent the stress flow within a concrete element or parts of it that are under the D region category, where Bernoulli assumptions are not applicable. Some say that the use of this method goes back to the early 20th century, yes, some 120 years ago when concrete was a new thing, and engineers used to rely on their intuition and expectation of load path.

    STM was given several boosts between the sixties and early eighties when Schlaich et al. published guidance on the theory and given typical examples with load paths. Later, international codes started to implement and “regulate” it if you wish, to keep up with engineers, who always challenge the status quo.

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    Coupled Shear Walls

    First things first, as you read this post, please refer to Coupled Shear Wall calculator available at: See Link

    The issue of coupled shear walls is one of the most debated topics among structural engineers. It's not surprising to see five people with twenty different opinions, each of valid points. Ove #Arup once said on this:

    "The more you look, the more you see,
    And that's why experts disagree.
    For some look here, and some look there,
    But no one can look everywhere.
    For if they did, it seems to me
    That they would hardly be experts, you see.
    According to their point of view,
    What they say may well be true,
    But looking from another angle,
    We tend to get into a tangle.
    Which of the views is then correct?
    That is not easy to suspect.”


    Euler Load Image 1
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    To Double Curvature or Not?

    Clause 10.3.1 of the Australian Standard AS3600-2018 includes a very interesting stipulation on columns in relation to the ratio of M1/M2. This applies to normal columns found throughout the building height, which are typically subject to double curvature behaviors.
    According to the Standard, if the analysis moment is less than the minimum eccentricity moment about the respective direction or 5%DN*, the ratio above should be taken as negative. This means the column should be assumed to be subject to single curvature, making it more conservative due to the high moment magnifier (δb).
    The logic behind this stipulation is that there may be inaccuracies or errors during installation or due to pattern loading. As a result, the column might experience single curvature loading or "snap through to single curvature mode," as stated in AS3600. Therefore, the analysis assuming double curvature moments would be overwritten by the opposite minimum eccentricity moment.

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