Building Construction
To ensure that supporting area of an offset footing of a boundary wall is fully compressive, the C.G. of load must act

Within the middle third of the base
At the centre of the base
Within the middle fifth of the base
Neither (A), (B) nor (C)

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Building Construction
Slate

Possesses good water absorption capacity
Splits into thin sheets along its bedding planes
Is a metamorphic rock
Has a smooth surface and contains alumina and silica

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