What is the height of the main ledge

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The height of the main ledge is stated as the maximum allowable, in relative dimensions. It is usually measured in the center of the facade of each individual building, the exceptionally long facade of the buildings can be divided into smaller sections according to the required height of the main ledge. The height of the main ledge was derived from the height of the house. E.g. For one-storey building it is 1/16 building, the two-storey building is 1/30 height. The main ledge terminates the building at the point of the roof connection. It has its merits in closing the truss construction. The ledge is 400-600 mm.