Building Construction
Minimum width of landing should be

Half the width of stairs
One fourth the width of stairs
Equal to width of stairs
Twice the width of stairs

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Building Construction
Negative skin friction

Neither (A) not (B)
Both (A) and (B)
Is a downward drag acting on a pile due to downward movement of the surrounding compressible soil relative to the pile
Develops due to lowering of ground water

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