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  3. a 400 mm concrete wall supports a dead load of 280

A 400 mm concrete wall supports a dead load of 280 KN/m and a live load...

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Civil Engineering

A 400 mm concrete wall supports a dead load of 280 KN/m and alive load of 230 KN. The allowable bearing pressure is 230 KN/m2and the level of the bottom of the footing is 1.5 m below theground surface. Assume concrete weighs 24 KN/m3, that of soil is15.74 KN/m3, fc’ = 20.7 Mpa, fy = 248 MPa,. Use 25 mm diameterreinforcing bars. Thickness of footing = 500 mm and concrete coveris 75 mm.

Calculate the :

(a) effective soil pressure

(b) width of wall footing

(c) spacing of bars at critical section

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