ESE 2021 Technical Quiz || Design of Column
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Use M30/Fe 415 (SBC = 125 kN/m2)
(size of column = 500 mm × 500 mm)
(use LSM and assume weight of foundation = 20% of column load)
Statement (II): Load carrying capacity of a column with helical reinforcement is more that with lateral ties.
1. Critical section for bending moment is at the face of the column for footing supporting a concrete column.
2. Critical section for bending moment is half way between the centre line and edge of the wall for footing supporting a masonry wall.
3. Critical section for one way shear is at a distance equal to effective depth of the footing from centre of the column in case of footings on soils.
4. Critical section for punching shear is at a distance equal to half of the effective depth of the footing from face of the column in case of footings on soils.
Which of the above statement(s) is/are correct
[Take M25 grade of concrete and Fe415 grade of steel and bond strength τbd =1.4 N/mm2]
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