RCC Structures Design
With usual notations the depth of the neutral axis of a balanced section, is given by

mc/t = (d - n)/n
mc/t = n/(d - n)
t/mc = (d + n)/n
t/mc = (d - n)/n

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RCC Structures Design
Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than

24 diameters from the centre of the column
42 diameters from the inner edge of the column
42 diameters from the centre of the column
42 diameters from the outer edge of the column

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RCC Structures Design
An R.C.C. lintel is spanning an opening of 2 m span in a brick wall. The height of the roof is 2.9 m above the floor level and that of the opening is 2.1 m above the floor level. The lintel is to be designed for self weight plus

Triangular load of the wall
UDL of wall
UDL of wall + load from the roof
Triangular load + load from the roof

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