mitre line

plural mitre lines · alternative US miter line

1. engineeringA line drawn marking an angle of 45 degrees, especially in the use of aligning the depth lines between the top and side views of a third angle projection technical drawing.

   The most commonly used method for transferring depth measurements between the top and side views is through use of a 45° miter line, commonly known as the miter transfer system.

   2012, Dennis Dorn, Mark Shanda, Drafting for the Theatre, page 81

   2 more examples

   It is necessary to draw a line on the moulded surface which will be the intersection of the front and the return moulding. This line is known as a mitre line, and the intersecting arrises of the moulding, the mitre.

   1914, George R. Barham, Masonry: an Elementary Text-book for Students in Trade Schools and Apprentices, page 23

   Extend its relevant points across to the mitre line and then turn those lines at 90° to the mitre line and extend them. Mark the relevant height dimensions of the standard former from the mitre line along the new extended lines and the correct shape is obtained.

   2013, John Blurton, Scenery: Draughting and Construction for Theatres, Museums, Exhibitions and Trade Shows, page 159