Building Construction
Mansard roof is a roof which slopes in

Two directions without break in the slope on each side
Two directions with break in the slope on each side
Four directions with break in the slope on each side
Four directions without break in the slope on each side

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Building Construction
In a colar beam roof

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

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