Building Construction
For providing a raft foundation, the following activities are involved1.Ramming the foundation bed2.Excavation of the soil upto required depth3.Laying the reinforcement over the foundation bed4.Curing the cement concrete placed over reinforcement5.Pouring the cement concrete over the reinforcementThe correct sequence is

5, 4, 3, 2, 1
3, 2, 5, 1, 4
2, 1, 3, 5, 4
1, 2, 3, 4, 5

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Building Construction
Raft foundations are used for:

All listed here
Spanning over small soft or loose pockets
Providing increased area of foundation over poor bearing capacity of soil
Counter acting the hydrostatic effect

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