Concrete Technology and Design of Concrete Structures
The critical section for finding maximum bending moment for footing under masonry wall is located

at the edge of the wall
at a distance equal to effective depth of footing from the edge of the wall
at the middle of the wall
halfway between the middle and edge of the wall

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Concrete Technology and Design of Concrete Structures
The diameter of ties in a column should be

More than 5 mm but less than one-fourth of diameter of main bar
More than 5 mm and also more than one-fourth of diameter of main bar
More than or equal to one fourth of diameter of main bar
More than or equal to 5 mm

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