(1) 2A 3X 2A Q2.20 Given the general trapezoidal combined footing formulas: B, -1 and B. B. L Prove from first principle

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1 2a 3x 2a Q2 20 Given The General Trapezoidal Combined Footing Formulas B 1 And B B L Prove From First Principle 1 (80.42 KiB) Viewed 37 times

(1) 2A 3X 2A Q2.20 Given the general trapezoidal combined footing formulas: B, -1 and B. B. L Prove from first principles using the relevant labelled diagram in your lecture notes. Hint: You should be able to generate four equations in terms of B1, B2, L, A and x from (i) Area = ?, (ii) Area = Resultant / qallow (iii) Moments = 0 about one of the ends of the combined footing, and (iv) Applying the first moment of area ΣΑr equation: 7= ΣΑ