This standard lays down minimum requirements for logs for making veneers for the manufacture of various grades of plywood, namely, tea-chest [ IS : 10 ( Part 2 )-1976* ] general purposes ( IS : 303-1975〓 ), medium strength aircraft (IS : 709-1974〓 ), and hish strength aircrafts ( IS : 4859-1968§ ), marine (IS : 710-1976〓), decorative ( IS : 1328-1982〓 ), ( IS : 7316-1974**), shutterine ( IS : 4990-1981〓 ), fire retardant plywood ( IS : 5509-1980〓 ), and veneered particle boards ( IS : 3097-1980§§ ), block boards ( IS : 1659-1979〓 ), and flush doors [ IS : 2191 ( Part 1 )-1983〓] conforming to the relevant standards.