Accoya® Alder Lumber Grading and Dimensions Specifications
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Accoya® Alder Lumber Grading and Dimensions Specifications Grade Names & Definitions for Accoya® Alder the world's leading high technology wood

Accoya® Alder, rough sawn Surfaced Front Side Surfaced Backside

Accoya® Alder Lumber Grades Minimum grade definition Alder Superior S1 grade is based on Superior grade red alder that we purchase. Grade notes • Long and wide clear face cuttings • High yield for users requiring multiple rips and chops Yield • Best face: Minimum 83 1/3% clear face cuttings • Minimum cutting sizes: 4” x 3’ or 3” x 6’ • everse Face: CAB grade or better (66 2/3% in 4” x 2’ or R 3” x 3’ cuttings) Minimum width 3” and wider: no more than 5% of the pieces below 4 -1/2” Wane • Best Face: Maximum wane 10% of surface measure • everse Face: max 1/4 the width by 3/4 the length or R...

Surfaced Front Side Surfaced Backside

Accoya® Alder Lumber Grades Surfaced Front Side Surfaced Front Side Surfaced Backside Surfaced Backside

General Specifications Minimum grade definition Available dimensions Accoya® Alder is delivered in random width bundles (packs) and fixed thickness and length. Thickness No more than 1 mm less than the specified size. Width No more than 1 mm less than the specified size. Length No more than 20 mm shorter than nominal length. Moisture Content 3 - 5%. Thickness Thickness (Nominal) Metric Definitions Pin knot: A small knot with a diameter of 13 mm or less. Minimum Size Cuttings 75mm x 1,800mm or 100mm x 900mm. No limit on number of cuttings allowed. The Accoya production process swells wood...

Accoya® Alder Lumber Grades Surfacing Considerations Surfaced Front Side Surfaced Backside Discoloration The acetylation process can result in discoloration generally up to 5 mm in depth with sticker marks up to 6 mm in depth. Natural wood variances can also result in discoloration. Removal of surface discoloration is not typically required when using opaque coatings. Rough Sawn

Table 1: Allowed Bow Surfaced Front Side Surfaced Backside

Accoya® Alder Lumber Grades Table 2: Allowed Twist per 100 mm Width

Table 3: Allowed Cupping

www.accsysplc.com www.accoya.com www.tricoya.com Accsys Technologies UK & Ireland enquiries T: +44 1753 757500 Other Europe enquiries T: +31 26 320 1400 LGa_EU_v2.1 © Accsys Technologies May 2012. Accsys Technologies is the trading name of Titan Wood Limited. The ACCOYA® and Trimarque Device are registered trademarks owned by Titan Wood Limited, which may not be used or reproduced without written permission. Accsys Technologies reserves the right to withdraw, amend or vary the information contained within this document at any time. No representation or warranty is given as to the accuracy...