Cross-sectional dimensions and sizing standards

Cross sectional dimensions given in the tables to this Section are applicable to either basic sawn or regularised sizes as defined in BS EN 1313 -1. Reference should be made to the accompanying notes to the tables to determine whether sawn or regularised sizes apply. The tables do not apply where dimensions have been reduced by planing. For timber of North American origin the tables apply only as indicated to surface sizes unless the timber has been resawn to BS EN 1313 -1 requirements.