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Where ( L_{crack} ) is an assigned cracked length (typically 5–10% of member length). Alternatively, use based on crack depth ratio ( a/h ):

[ k_{\theta} = \frac{EI_{uncracked}}{L_{crack}} ] space gass crack

[ I_{cracked} = I_{uncracked} \times (1 - 2.5(a/h)^2) ] Where ( L_{crack} ) is an assigned cracked