Standard joist (beam) depths (H) range from 200 mm to 600 mm. Maximum length is 12.4 m.
Size tolerances, measured at moisture content equivalent to 17 % in the flanges:
Overall beam depth H: ± 1 mm
Flange width and depth: ± 1 mm
Web thickness: ± 0,5 mm
Maximum moisture content by the time of assembly is 18 % for the timber flanges and 10 % for the web boards.