Further Thoughts on "Tilt-Up Design Pitfalls": Discussion of an article by Nagele, Lawson, and Griffin.

The article "Further Thoughts on 'Tilt-Up Design Pitfalls'" addresses potential issues with slender wall design in tilt-up wall construction. The authors highlight concerns such as the misuse of the effective moment of inertia, confusion regarding the correct modulus of rupture for calculating cracking moment, and challenges in determining the factored moment to account for out-of-plane wall deflection. They propose a new expression for the effective moment of inertia and suggest a limit for axial wall load to prevent inaccurate calculations. The article also discusses the ACI CODE- 562- 21 and its repair code process, recommending revisions to Section 11.8.3.1 in ACI 318-19(22) to include additional restrictions on factored axial loads. The importance of considering cracking and additional stresses, as well as provisions for stable equilibrium and the use of Ie for computing out-of-plane deflection, are also discussed. It is noted that the ACI 318-19(22) slender wall design method is based on simple support conditions and may need adjustments for other support conditions. [Extracted from the article]