Patent ID: 7418874

Claim:
A method for quality assurance of preferably finger-jointed long timber ( 1 , 1 ′), produced in series and having a predetermined minimum length ( 12 ), in particular of structural solid wood, characterized in that each long timber ( 1 , 1 ′) finished within the length ( 12 ), preferably each long timber completely glued together, is loaded with tensile forces engaging the respective ends ( 5 ) thereof and increasing to a threshold value below the breaking load of a faultless long timber, and the change in length (α 1 1 ) increasing therewith is determined in at least one section or across the entire length of the long timber ( 1 , 1 ′) and is used as a quality criterion for the use, or the further processing, respectively, of the long timber ( 1 , 1 ′).