AFRYKAŃSKIE I POŁUDNIOWO AMERYKAŃSKIE NORMY DREWNA
| Standard grades | |
|---|---|
| FAS (First And Second) |
– Minimum of 40% of wood exempt of defects and sapwood – The pieces must have good texture – Tolerance of 3% of pieces having interwoven grain – On pieces of less than 1 m2 one standard defect is admitted: a knot of 16 to 32 mm — pin holes, insect holes clusters with diameter < 32 mm -- gum pocket not exceeding 32 cm2 of surface -- a straight shake in the extremity not exceeding 10% of the piece's length - On pieces between 1 m2 and 1,5 m2 two standard defects are admitted: a knot with diameter between 32 mm and 64 mm -- gum pocket exceeding 32 cm2 but smaller than 64 cm2 -- a oblique shake in the extremity not exceeding 10% of the piece's length - On pieces over 1,5 m2 three standard defects are admitted: a knot with diameter between 64 mm and 89 mm -- gum pocket not exceeding 97 cm2 |
| No 1 Common and Select | – Defects and sound sapwood admitted up to 20% of the piece’s width – Some grain and texture variations admitted – 1 standard defect on a piece of less than 0,6 m2 – 2 standard defects on a piece between 0,6 m2 and 1 m2 – 3 standard defects on a piece between 1 m2 and 1,5 m2 – 4 standard defects on a piece of more than 1,5 m2 |
| No 2 Common | – Sound sapwood tolerated without limits – Slight blue stains tolerated – Small dead pin holes, isolated or grouped, not exceeding 1/2 of the piece’s surface, are tolerated in 10% of the batch maximum – Abnormal grain is tolerated as long as it does not affect the resistance and flatness of the piece – Colour and density variations admitted – 1 standard defect on a piece of less than 0,6 m2 – 2 standard defects on a piece between 0,6 m2 and 1 m2 – 3 standard defects on a piece between 1 m2 and 1,5 m2 – 4 standard defects on a piece of more than 1,5 m2 |
| Special Grades | |
|---|---|
| Prime | – Must have at least 80% exempt of defects and sapwood – Sound sapwood not exceeding 5% of the piece’s width is tolerated – Tolerance to defects is same as on the preceding grades – The grade must be of excellent texture and exempt of abnormal grains |
| Prime Narrow | – Straight grain and no Defects |
| FAS Shorts | – In specifications over 15 cm of width, pieces 20 cm or more wide may present one defect – In specifications over 7,5 cm of width, pieces 15 cm or more wide may present one defect |
| Prime Strips | – One clear side – The opposite side and a third of its thickness over adjacent edges may present one defect per 1,20 m |
| Prime Blocks and Shorts | – One clear side – The opposite side and a third of the thickness over its adjacent edges may present one defect |
| Prime Furniture Squares | – Square sections exempt of Defects |
| Selected Constructional Grade | – Well sawn pieces to contractual dimensions, without excessive presence of sapwood, worm holes, distorted knots, rotten heart, or shakes that could affect the resistance of the piece and its durability – Wane is permitted on sections of 390 cm2 and more, if not exceeding 10% of the dimension – Intergrown hearts, well closed, are also permitted on these sections, except when contractually excluded – Shakes normally due to drying and not affecting the solidity of the pieces are tolerated |