This section is from the book "Modern Buildings, Their Planning, Construction And Equipment Vol2", by G. A. T. Middleton. Also available from Amazon: Modern Buildings.
Measure as previously described.
Measure per foot run or per foot super. De rcribe as "1 1/2-inch wrought double rebated jamb linings, tongued at angles and backings," or as the case may be. If backings are dovetailed, state it. If the linings are framed and panelled, describe it, and state in how many panels the set. The dimension for the length will be twice the height plus the width of the door plus four times the thickness of the linings, for passings at angles.
As before described.