Shear Capacity of Reinforced Concrete Beams using ACI 318-19

Shear capacity of reinforced concrete beams has changed from ACI 318-14 to the latest code edition, ACI 318-19. The detailed method is no more, and significant changes have been made the concrete term Vc.

This video gives an overview of shear in reinforced concrete beams, highlights the changes in the concrete Vc term, and reviews the steel stirrup contribution Vs. Two example problems are completed: the first for a beam with less than minimum transverse reinforcement, and the second for a beam with more than the minimum transverse reinforcement.

This video is in US units (inches, pounds, and psi), but here are the conversions to SI units (millimeters, Newtons, and MPa):

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.

If you want to convert my numbers from the examples (these are the only US to SI conversions you'll basically ever need for any strength calculations)...
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).
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.

Chapters:
0:00 Introduction
2:40 Concrete Vc
6:08 Steel Vs
7:57 Example 1
11:31 Example 2