I was having a hard time finding this information in ACI 318-19, and this was the perfect video for me. Would love to see more videos diving into ACI. I have also been enjoying watching your other videos!
Thanks prof. For this useful video. Is it possible you can a video on pile caps as the size reduction has a major impact due to the large depth of pile caps. Pile caps designed using aci 318-14 and aci 318-19 are having a major change in depth.
Do you mean moment of inertia? I have two already! Uncracked sections (gross versus transformed MoI): ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Cu-MxKu5w54.html Cracked sections (cracked MoI): ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-eiz2Qi6RWtM.html
My favorite text book on the topic is Reinforced Concrete Design by Pincheira, Parra-Montesinos, Wang, and Salmon. The 9th edition covers the most recent ACI 318-19.
I can help with that. The equations are all the same for SI units except for the following exceptions. Here are the conversions from psi to MPa and inches to millimeters, with the video timestamps included... Converting equations for Vc in Section 22.5.5 from psi to MPa (2:44) - change the 2 coefficient to 0.17 and change the 8 coefficient to 0.66 Converting Av,min in Section 9.6.3.4 from psi to MPa (2:44) - change the 0.75 coefficient to a 0.062 and change the 50 coefficient to 0.35 Converting size factor lambda,s from Section 22.5.5.1.3 from inches to millimeters (5:20) - equation becomes sqrt(2/(1+0.004d)) All the steel strength equations are the same - obviously you'll have the stirrup Av in square millimeters and the steel strength fy in MPa. It's a bit more work to convert the examples, but the process is identical except with the small equations changes above. If you want to covert my numbers... 1 MPa = 145 psi (so the 5000 psi concrete is 35 MPa), 25.4 mm = 1 inch (so the 24-in deep beam is 610-mm deep), and 4.45 Newtons = 1 pound or 4.45 kN = 1 kip (so the Example 1 design capacity of 24 kips is 107 kN). Those are the only US to SI conversions you'll basically ever need for any strength calculations. Rebar are specified differently, but a #3 rebar is very close to a 10M (10-mm diameter) bar and a #8 bar is very close to a 25M (25-mm diameter) bar.
