Thank you for your detailed feedback-it’s much appreciated! Here’s a quick response to your points: Middle third rule: A stability principle commonly applied in UK foundation design but perhaps less familiar in the U.S. Cut roof vs. truss roof: "Cut roof" refers to site built roofs, a term widely used in the UK. I’ll clarify this to avoid regional confusion. Effective span: This is a key term in Eurocode design, referring to the span length used in calculations. I’ll make the definition clearer in future quizzes. Prestressed concrete: Reducing tensile stresses for longer spans is a fundamental advantage, though "eliminates cracking under service loads" is also valid. I’ll refine the question to reflect this. Partial safety factors: These are central to Eurocodes, used to account for uncertainties in loads and material strengths, differing from U.S. practices. Thanks again for sharing your thoughts! We’ll continue to make our quizzes both engaging and more globally inclusive while maintaining the professional standards we uphold in practice. 👍

@@StructuralEngineerCalcs OK then about "rule of thirds"- when I took strength of materials classes that was called the "kern" of the section, the same thing you're talking about. If you are making future videos applicable to a lot of different regions you could to check to see what terminology is more universal. When I see people asking about prestressed concrete I like to think of it as a way to limit cracking in concrete and by limiting cracking it counteracts all of the negative behavior of concrete that goes along with cracking- thus prestressing reduces flexural deflection, reduces environmental damage to concrete, and increases shear strength.

Thanks so much for the warm welcome and for taking the quiz! 25/30 is a solid score-well done!!

You’re welcome! It’s great to hear that this served as a good refresher for you. If there’s anything specific you’d like to revisit or discuss, don’t hesitate to reach out!!

Welcome back Sir 28/30

Well done on scoring 27/30! That’s fantastic. I’m glad the quiz helped break up your day. If there’s anything you’d like to dive deeper into, just let me know!!

You're welcome! I'm glad you found the quiz helpful. If you have any questions or need further clarification, feel free to ask!!

@ sure sir. Thank you

Has h valued already included in 13.2 kN/m which is Pa so Resultant P= 1/2*Pa*h ( here 1/2* base* height where Pa= 0.33*20*2)