Define facing, backing, hearting and Through stone with neat sketch.

Define facing, backing, hearting and Through stone with neat sketch.
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Answer :

Facing: The material used in the face of the wall is known as facing.

Backing: The material used in the back of the wall is known as backing.

Hearting: The inner portion of the wall between the facing and backing is known as hearting.

Through stone: A header stone having length equal to wall width is placed across the wall casted through stone.

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