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ACCOYA

Accoya® wood represents a major development in wood technology. It enables the consistent supply of durable, non-toxic, dimensionally stable wood. This makes it an ideal material for manufacturing high performance, exterior timber products like wood siding and outside decking. Accoya is manufactured through the acetylation of plantation grown softwood. For over 80 years this has been the gold standard in the academic field of wood science. 


AVAILABLE GRADES


A1

 4 sides primarily clear with total allowance (combination of all sides) of the following:

 LESS THAN 50 MM THICKNESS:

Up to 3 of the following defects or equivalent:
- Knot (pin): 8 mm or less
- Bark or resin pocket: 8 mm wide, 50 mm long or equivalent. 

50 MM THICKNESS AND GREATER:

Up to 6 of the following defects or equivalent:
- Knot (intergrown, partially intergrown and tight encased):

 RESIN STREAKS

Three up to 8 mm wide, 100 mm long or equivalent, slightly more for a short distance. 

SURFACE CHECKS

- Three up to 1 mm wide, 250 mm long or equivalent, slightly more for a short distance.
- For boards 200-300mm wide the following additional allowance applies: Up to 1 surface check per 50 mm width, no wider than 1 mm, 250 mm long or equivalent, slightly more for a short distance. 

SPLITS

Short split, up to width of board and not to exceed 200 mm.

NEEDLE FLECK / BIRDS EYE

Medium birds eye or fleck. WARP

As given in tables 1,2,3,4. WANE

Up to 8mm in depth,

1⁄4 length of board of equivalent, slightly

more for short distance. Transport damage is permitted within the same wane limits.

SURFACE FINISH

Supplied sawn.


A2 

(THINNER DIMENSIONS < 50 MM)

BETTER FACE AND EDGE COMBINED TOTAL:

Up to 4 of the following defects or equivalent:

- Knot (intergrown, partially intergrown and tight encased): 15 mm or equivalent smaller.

- Bark or resin pocket: 10 mm wide, 100 mm long or equivalent.

REVERSE FACE AND EDGE COMBINED TOTAL:

Up to 6 of the following defects or equivalent:

- Knot (intergrown, partially intergrown and tight encased): 30 mm or equivalent smaller.

- Bark or resin pocket: 10 mm wide, 100 mm long or equivalent.

COLLAPSE

Insufficient to affect dry- dressed dimensions.

RESIN STREAKS

One, 1/5 width, 1/3 length or equivalent, slightly more for a short distance. 

SURFACE CHECKS

- Three up to 1 mm wide, 250 mm long or equivalent, slightly more for a short distance.

- For boards 200-300mm wide the following additional allowance applies: Up to 1 surface check per 50 mm width, no wider than 1 mm, 250 mm long or equivalent, slightly more for a short distance.

SPLITS

Short split, up to the width of board and no more than 200 mm.

NEEDLE FLECK / BIRDS EYE

Medium birds eye or fleck.

WANE

Up to 8mm in depth, 1⁄4 length of board of equivalent, slightly more for short distance. Transport damage is permitted within the same wane limits.

SURFACE FINISH

Supplied sawn.

WANE

Up to 12 mm in depth, 1/2 length of board or equivalent, slightly more for a short distance. Transport damage is permitted within the same wane limits.

WARP

As given in tables 1, 2, 3, 4.  (https://www.accoya.com/wp-content/uploads/2017/03/LG_EN_web.pdf)


A2 

 (THICKER DIMENSIONS ≥ 50 MM)

FRONT 1 (GOOD) SIDE AS A1:

BACKSIDE + SIDES: 

KNOTS AND RESIN POCKETS

Single large defect or defect area of any type allowed, provided it is covering a board length of <500 mm. Or, a maximum of 2 large defects (25 mm width).

SPLITS

Short split, up to width of board and not to exceed 200mm.

SURFACE CHECKS

Checks in knots are allowed.

KNOTS AND RESIN POCKETS

Up to 6 of the following defects or equivalent:
- Knot (intergrown, partially intergrown and tight encased) 15 mm or less.
- Bark or resin pocket: 10mm wide, 100 mm long or equivalent.

- Resin streaks, three up to 8 mm wide, 100 mm long or equivalent, slightly more for a short distance.

 SPLITS

Short split, up to width of board and not to exceed 200 mm.

SURFACE CHECKS

- Three up to 1 mm wide, 250 mm long or equivalent, slightly more for a short distance.
- For boards 200-300mm wide the following additional allowance applies: up to 1 surface check per 50 mm width, no wider than 1 mm, 250 mm long or equivalent, slightly more for a short distance. 

NEEDLE FLECK / BIRDS EYE

Medium birds eye or fleck.


Additional Grades

Available on request as outlined in this document
(https://www.accoya.com/wp-content/uploads/2017/03/LG_EN_web.pdf)

 


STANDARD DIMENSIONS 

(Stock Item vary by demand)

1x6, 8

1.25x6, 8

1.5x6, 8

2x6, 8

2.5x6, 8

3x6, 8