Building Construction
The loose pockets in soil mass can be bridged safely by providing a raft foundation provided the soft area is smaller than

Three-fourth the column spacing
The column spacing
Half the column spacing
One-third the column spacing

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Building Construction
In a colar beam roof

There is no horizontal tie beam
There are two horizontal ties, one at the feet and other at the middle of the rafters
There is a horizontal tie at the feet of rafters only
There is a horizontal tie at almost the middle of rafters only

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