CONSIDERATIONS FOR GRADING SPECIES COMBINATIONS. THE EXAMPLE OF DOUGLAS FIR WITH LARCH IN IRELAND AND UK

David Gil-Moreno; Dan Ridley-Ellis; Annette M. Harte

doi:10.52202/069179-0106

CONSIDERATIONS FOR GRADING SPECIES COMBINATIONS. THE EXAMPLE OF DOUGLAS FIR WITH LARCH IN IRELAND AND UK

David Gil-Moreno, Dan Ridley-Ellis, Annette M. Harte

Civil Engineering

Research output: Chapter in Book or Conference Publication/Proceeding › Conference Publication › peer-review

1 Citation (Scopus)

Abstract

This paper examines the grading of Douglas fir (Pseudotsuga menziesii) and larch (Larix spp.) as a strength grading species combination for the growth area formed by Ireland and the UK. The two genera produce higher timber quality than Sitka spruce (Picea sitchensis), the main commercial timber species in the two countries. Developing this species combination may increase the volume of timber available for the market, making these species more commercially attractive to sawmills, particularly if there are common settings that can be used for either species whether mixed in production or not. Simultaneously, the paper examines the challenges of mixed species grading within the framework of the European standard EN14081 for machine control grading, as the requirements for combining species are not clearly defined. More than 1600 pieces are used for this study. The results found that the ranges of modulus of elasticity, strength and density of both species are similar, but special considerations are required to ensure the safe grading of the timber.

Original language	English
Title of host publication	13th World Conference on Timber Engineering, WCTE 2023
Editors	Anders Q. Nyrud, Kjell Arne Malo, Kristine Nore, Knut Werner Lindeberg Alsen, Saule Tulebekova, Efthymia Ratsou Staehr, Gabrielle Bergh, Wendy Wuyts
Publisher	World Conference on Timber Engineering (WCTE)
Pages	773-779
Number of pages	7
ISBN (Electronic)	9781713873297
DOIs	https://doi.org/10.52202/069179-0106
Publication status	Published - 2023
Event	13th World Conference on Timber Engineering: Timber for a Livable Future, WCTE 2023 - Oslo, Norway Duration: 19 Jun 2023 → 22 Jun 2023

Publication series

Name	13th World Conference on Timber Engineering, WCTE 2023
Volume	2

Conference

Conference	13th World Conference on Timber Engineering: Timber for a Livable Future, WCTE 2023
Country/Territory	Norway
City	Oslo
Period	19/06/23 → 22/06/23

Keywords

Douglas fir
Larch
Species combination
Standards
Strength grading
Wood properties

Access to Document

10.52202/069179-0106

Cite this

Gil-Moreno, D., Ridley-Ellis, D., & Harte, A. M. (2023). CONSIDERATIONS FOR GRADING SPECIES COMBINATIONS. THE EXAMPLE OF DOUGLAS FIR WITH LARCH IN IRELAND AND UK. In A. Q. Nyrud, K. A. Malo, K. Nore, K. W. L. Alsen, S. Tulebekova, E. R. Staehr, G. Bergh, & W. Wuyts (Eds.), 13th World Conference on Timber Engineering, WCTE 2023 (pp. 773-779). (13th World Conference on Timber Engineering, WCTE 2023; Vol. 2). World Conference on Timber Engineering (WCTE). https://doi.org/10.52202/069179-0106

Gil-Moreno, David ; Ridley-Ellis, Dan ; Harte, Annette M. / CONSIDERATIONS FOR GRADING SPECIES COMBINATIONS. THE EXAMPLE OF DOUGLAS FIR WITH LARCH IN IRELAND AND UK. 13th World Conference on Timber Engineering, WCTE 2023. editor / Anders Q. Nyrud ; Kjell Arne Malo ; Kristine Nore ; Knut Werner Lindeberg Alsen ; Saule Tulebekova ; Efthymia Ratsou Staehr ; Gabrielle Bergh ; Wendy Wuyts. World Conference on Timber Engineering (WCTE), 2023. pp. 773-779 (13th World Conference on Timber Engineering, WCTE 2023).

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title = "CONSIDERATIONS FOR GRADING SPECIES COMBINATIONS. THE EXAMPLE OF DOUGLAS FIR WITH LARCH IN IRELAND AND UK",

abstract = "This paper examines the grading of Douglas fir (Pseudotsuga menziesii) and larch (Larix spp.) as a strength grading species combination for the growth area formed by Ireland and the UK. The two genera produce higher timber quality than Sitka spruce (Picea sitchensis), the main commercial timber species in the two countries. Developing this species combination may increase the volume of timber available for the market, making these species more commercially attractive to sawmills, particularly if there are common settings that can be used for either species whether mixed in production or not. Simultaneously, the paper examines the challenges of mixed species grading within the framework of the European standard EN14081 for machine control grading, as the requirements for combining species are not clearly defined. More than 1600 pieces are used for this study. The results found that the ranges of modulus of elasticity, strength and density of both species are similar, but special considerations are required to ensure the safe grading of the timber.",

keywords = "Douglas fir, Larch, Species combination, Standards, Strength grading, Wood properties",

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doi = "10.52202/069179-0106",

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series = "13th World Conference on Timber Engineering, WCTE 2023",

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pages = "773--779",

editor = "Nyrud, \{Anders Q.\} and Malo, \{Kjell Arne\} and Kristine Nore and Alsen, \{Knut Werner Lindeberg\} and Saule Tulebekova and Staehr, \{Efthymia Ratsou\} and Gabrielle Bergh and Wendy Wuyts",

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Gil-Moreno, D, Ridley-Ellis, D & Harte, AM 2023, CONSIDERATIONS FOR GRADING SPECIES COMBINATIONS. THE EXAMPLE OF DOUGLAS FIR WITH LARCH IN IRELAND AND UK. in AQ Nyrud, KA Malo, K Nore, KWL Alsen, S Tulebekova, ER Staehr, G Bergh & W Wuyts (eds), 13th World Conference on Timber Engineering, WCTE 2023. 13th World Conference on Timber Engineering, WCTE 2023, vol. 2, World Conference on Timber Engineering (WCTE), pp. 773-779, 13th World Conference on Timber Engineering: Timber for a Livable Future, WCTE 2023, Oslo, Norway, 19/06/23. https://doi.org/10.52202/069179-0106

CONSIDERATIONS FOR GRADING SPECIES COMBINATIONS. THE EXAMPLE OF DOUGLAS FIR WITH LARCH IN IRELAND AND UK. / Gil-Moreno, David; Ridley-Ellis, Dan; Harte, Annette M.
13th World Conference on Timber Engineering, WCTE 2023. ed. / Anders Q. Nyrud; Kjell Arne Malo; Kristine Nore; Knut Werner Lindeberg Alsen; Saule Tulebekova; Efthymia Ratsou Staehr; Gabrielle Bergh; Wendy Wuyts. World Conference on Timber Engineering (WCTE), 2023. p. 773-779 (13th World Conference on Timber Engineering, WCTE 2023; Vol. 2).

Research output: Chapter in Book or Conference Publication/Proceeding › Conference Publication › peer-review

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PY - 2023

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N2 - This paper examines the grading of Douglas fir (Pseudotsuga menziesii) and larch (Larix spp.) as a strength grading species combination for the growth area formed by Ireland and the UK. The two genera produce higher timber quality than Sitka spruce (Picea sitchensis), the main commercial timber species in the two countries. Developing this species combination may increase the volume of timber available for the market, making these species more commercially attractive to sawmills, particularly if there are common settings that can be used for either species whether mixed in production or not. Simultaneously, the paper examines the challenges of mixed species grading within the framework of the European standard EN14081 for machine control grading, as the requirements for combining species are not clearly defined. More than 1600 pieces are used for this study. The results found that the ranges of modulus of elasticity, strength and density of both species are similar, but special considerations are required to ensure the safe grading of the timber.

AB - This paper examines the grading of Douglas fir (Pseudotsuga menziesii) and larch (Larix spp.) as a strength grading species combination for the growth area formed by Ireland and the UK. The two genera produce higher timber quality than Sitka spruce (Picea sitchensis), the main commercial timber species in the two countries. Developing this species combination may increase the volume of timber available for the market, making these species more commercially attractive to sawmills, particularly if there are common settings that can be used for either species whether mixed in production or not. Simultaneously, the paper examines the challenges of mixed species grading within the framework of the European standard EN14081 for machine control grading, as the requirements for combining species are not clearly defined. More than 1600 pieces are used for this study. The results found that the ranges of modulus of elasticity, strength and density of both species are similar, but special considerations are required to ensure the safe grading of the timber.

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KW - Standards

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Gil-Moreno D, Ridley-Ellis D, Harte AM. CONSIDERATIONS FOR GRADING SPECIES COMBINATIONS. THE EXAMPLE OF DOUGLAS FIR WITH LARCH IN IRELAND AND UK. In Nyrud AQ, Malo KA, Nore K, Alsen KWL, Tulebekova S, Staehr ER, Bergh G, Wuyts W, editors, 13th World Conference on Timber Engineering, WCTE 2023. World Conference on Timber Engineering (WCTE). 2023. p. 773-779. (13th World Conference on Timber Engineering, WCTE 2023). doi: 10.52202/069179-0106

CONSIDERATIONS FOR GRADING SPECIES COMBINATIONS. THE EXAMPLE OF DOUGLAS FIR WITH LARCH IN IRELAND AND UK

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Keywords

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