Building Construction
A temporary rigid structure having platforms to enable masons to work at different stages of a building, is known as

Scaffolding
Raking shore
Dead shore
Under pinning

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Building Construction
Negative skin friction

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

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