ASTM D 245 - 06 Standard Practice for Establishing Structural Grades and Related Allowable Properties for Visually Graded Lumber

American Society for Testing and Materials (ASTM). Current edition approved March 1, 2006. Published March 2006. Originally approved in 1926. Last previous edition approved in 2002 as D 245 – 00 (2002). 16 p. This practice covers the basic principles for establishing related unit stresses and stiffness values for design with visually-graded solid sawn structural lumber. This practice starts with property values from clear wood specimens and includes necessary procedures for the formulation of structural grades of any desired strength ratio.