Tower Crane Foundation Design Calculation Example – Free Forever

For 7 m square, 2.5 m projection, (M_Ed \approx 0.5 \times q_max \times B \times c^2 = 0.5 \times 204.5 \times 7 \times 6.25 = 4473 , \textkNm) – that’s total moment.

Reinforcement required (per meter width, approximate): [ d = t - cover - \phi/2 = 1500 - 75 - 16 = 1409 , \textmm ] [ A_s = \fracM_Ed0.87 f_yk \times 0.9 d = \frac4473\times10^60.87\times500\times0.9\times1409 \times (1/7m)?? ] Let’s compute : Tower Crane Foundation Design Calculation Example

This exceeds (q_allow = 150 , \textkPa) → or must be deepened or widened. 4.5 Revised foundation size Try (L = B = 7.0 , \textm, t = 1.5 , \textm): For 7 m square, 2

Effective width (L') (ULS) with (e = M_d / N_total,ULS = 6300 / 2985.5 = 2.11 , \textm) [ L' = 3\times(3.5 - 2.11) = 4.17 , \textm ] [ q_max,ULS = \frac2 \times 2985.57 \times 4.17 = \frac597129.19 \approx 204.5 , \textkPa ] t = 1.5