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Outputs (57)

Quantification of chemical changes taking place in spruce wood structure following long period thermal treatment
Presentation / Conference Contribution
Popescu, C., Ridley-Ellis, D., & Popescu, M. (2019, August). Quantification of chemical changes taking place in spruce wood structure following long period thermal treatment. Paper presented at 2DCOS-10, The 10th International Symposium on Two-dimensional Correlation Spectroscopy, Changchun, China

Wood is a natural composite polymer containing different amounts of cellulose, lignin and hemicelluloses and some other low molecular compounds (i.e. extractives). Due to its structure wood is susceptible to degradation in the surrounding environment... Read More about Quantification of chemical changes taking place in spruce wood structure following long period thermal treatment.

TG1/201804/13rev2 Derivation of Goldeneye 706 grading machine settings for Douglas fir (IE & GB, C classes)
Report
Ridley-Ellis, D., & Gil-Moreno, D. TG1/201804/13rev2 Derivation of Goldeneye 706 grading machine settings for Douglas fir (IE & GB, C classes). NUI Galway

In this report, settings for Douglas fir (Pseudotsuga menziesii (Mirb.) Franco), PSMN, are derived for the Republic of Ireland and the United Kingdom for the following strength class combinations:
C40/C30/C16, C40/C27/C16, C40/C24/C16, C35/18, C35/1... Read More about TG1/201804/13rev2 Derivation of Goldeneye 706 grading machine settings for Douglas fir (IE & GB, C classes).

TG1 201804 14rev1 Derivation of Viscan Compact and Viscan portable with balance grading machine settings for Douglas fir (IE & GB, C classes)
Report
Ridley-Ellis, D., & Gil-Moreno, D. TG1 201804 14rev1 Derivation of Viscan Compact and Viscan portable with balance grading machine settings for Douglas fir (IE & GB, C classes). NUI Galway

In this report, settings for Douglas fir (Pseudotsuga menziesii (Mirb.) Franco), PSMN, are derived for the Republic of Ireland and the United Kingdom for the following strength class combinations:
C40/C30/C16, C40/C27/C16, C40/C24/C16, C35/C18, C35/... Read More about TG1 201804 14rev1 Derivation of Viscan Compact and Viscan portable with balance grading machine settings for Douglas fir (IE & GB, C classes).

TG1 201804 15rev1 Derivation of Viscan Plus machine settings for Douglas fir (IE & GB, C classes)
Report
Ridley-Ellis, D., & Gil-Moreno, D. TG1 201804 15rev1 Derivation of Viscan Plus machine settings for Douglas fir (IE & GB, C classes). NUI Galway

In this report, settings for Douglas fir (Pseudotsuga menziesii (Mirb.) Franco), PSMN, are derived for the Republic of Ireland and the United Kingdom for the following strength class combinations:
C40/C30/C16, C40/C27/C16, C40/C24/C16, C35/C18, C35/... Read More about TG1 201804 15rev1 Derivation of Viscan Plus machine settings for Douglas fir (IE & GB, C classes).

TG1 201804 17 Rev2 Derivation of Viscan and Viscan portable without balance grading machine settings for Douglas fir (IE & GB, C classes)
Report
Ridley-Ellis, D., & Gil-Moreno, D. TG1 201804 17 Rev2 Derivation of Viscan and Viscan portable without balance grading machine settings for Douglas fir (IE & GB, C classes). NUI Galway

In this report, settings for Douglas fir (Pseudotsuga menziesii (Mirb.) Franco), PSMN, are derived for the Republic of Ireland and the United Kingdom for the following strength class combinations:
C30/C16, C27/C16, C24/C16, C24/C14, C22/C14, C20/C14... Read More about TG1 201804 17 Rev2 Derivation of Viscan and Viscan portable without balance grading machine settings for Douglas fir (IE & GB, C classes).

TG1 201804 16 Derivation of Goldeneye 702 grading machine settings for Douglas fir (IE & GB, C classes)
Report
Ridley-Ellis, D., & Gil-Moreno, D. TG1 201804 16 Derivation of Goldeneye 702 grading machine settings for Douglas fir (IE & GB, C classes). NUI Galway

In this report, settings for Douglas fir (Pseudotsuga menziesii (Mirb.) Franco), PSMN, are derived for the Republic of Ireland and the United Kingdom for the following strength class combinations:
C35/C18, C35/C16, C30/C16, C27/C16, C24/C16, C24/C14... Read More about TG1 201804 16 Derivation of Goldeneye 702 grading machine settings for Douglas fir (IE & GB, C classes).

TG1 201810 16 Derivation of Goldeneye 702 grading machine settings for British Spruce tiling battens
Report
Ridley-Ellis, D. TG1 201810 16 Derivation of Goldeneye 702 grading machine settings for British Spruce tiling battens. Coillte

In this report, settings for ‘British Spruce’ (WPCS: Sitka spruce [Picea sitchensis] and Norway spruce [Picea abies]) are derived for the United Kingdom (GB) and Ireland (IE) for the following strength class combinations:
C14 / reject
batten14 / re... Read More about TG1 201810 16 Derivation of Goldeneye 702 grading machine settings for British Spruce tiling battens.

The Challenge of Strength Grading UK Hardwoods
Presentation / Conference Contribution
Cramer, M. (2023, November). The Challenge of Strength Grading UK Hardwoods. Presented at ICWSE 2023, Brașov, Romania

Recent research in Europe is bringing a wider range of wood species to the construction market as structural timber and glue laminated products. This option would also open markets for currently underused UK species, foremost hardwoods, but testing e... Read More about The Challenge of Strength Grading UK Hardwoods.

Grading of British spruce cladding battens by ring width for density, fastener performance and fire
Presentation / Conference Contribution
Ridley-Ellis, D. (2019, October). Grading of British spruce cladding battens by ring width for density, fastener performance and fire. Presented at 15th Annual Meeting of the Northern European Network for Wood Science and Engineering, Lund, Sweden

The UK has a British Standard for external timber cladding, BS8605-1, in which support battens are defined as timber components of a section, grade, and durability, suitable for supporting external timber cladding. The term includes both battens (whi... Read More about Grading of British spruce cladding battens by ring width for density, fastener performance and fire.

Influence of knot area indexes on tension strength of Sitka spruce
Presentation / Conference Contribution
Gil-Moreno, D., Ridley-Ellis, D., & Harte, A. M. (2019, September). Influence of knot area indexes on tension strength of Sitka spruce. Presented at 15th Annual Meeting of the Northern European Network for Wood Science and Engineering, Lund, Sweden

It is well known that knots can reduce the strength of timber, and the selection of “critical section” for testing to EN 408 and EN 384 is typically based on the size and position of knots. In Ireland, the visual strength grading Standard IS 127 spec... Read More about Influence of knot area indexes on tension strength of Sitka spruce.

The daily cycle of moisture content expansion and contraction in UK-grown Sitka spruce trees
Presentation / Conference Contribution
Adams, S., & Ridley-Ellis, D. (2018, June). The daily cycle of moisture content expansion and contraction in UK-grown Sitka spruce trees. Paper presented at Timber 2018

The diameter of five dominant Sitka spruce (Picea sitchensis) trees at Griffin Forest (near Aberfeldy, Scotland) were monitored at two minute intervals with dendrometers between April 2008 and October 2012. This experiment was designed to investigate... Read More about The daily cycle of moisture content expansion and contraction in UK-grown Sitka spruce trees.

Some awkward questions about density
Presentation / Conference Contribution
Ridley-Ellis, D., & Cramer, M. (2020, September). Some awkward questions about density. Presented at Timber 2020, Online

There are several different concepts of wood density, such as specific gravity, basic density, dry density, and oven dry density. These are often confusing, and sometimes poorly described in the literature, but they can be unambiguously defined and m... Read More about Some awkward questions about density.

Some thresholds for grading British grown spruce to optimised strength classes using longitudinal resonance
Presentation / Conference Contribution
Ridley-Ellis, D., Adams, S., & Lehneke, S. (2018, August). Some thresholds for grading British grown spruce to optimised strength classes using longitudinal resonance. Presented at World Conference on Timber Engineering, Seoul, Republic of Korea

The main commercial species in the UK and Ireland is Sitka spruce (Picea sitchensis), which is graded in combination with a small amount of Norway spruce (P. abies). It is typically graded to the European strength class C16, but actually has superior... Read More about Some thresholds for grading British grown spruce to optimised strength classes using longitudinal resonance.

A case study of timber demolition recycling in the UK
Presentation / Conference Contribution
Cramer, M., & Ridley-Ellis, D. (2020, December). A case study of timber demolition recycling in the UK. Presented at Northern European Network for Wood Science and Engineering – WSE2020, Online (Helsinki)

Test Machine Effect in the determination of modulus of elasticity for strength-graded timber
Presentation / Conference Contribution
Gil-Moreno, D., Ridley-Ellis, D., & Harte, A. M. (2021, August). Test Machine Effect in the determination of modulus of elasticity for strength-graded timber. Presented at WCTE 2021: World Conference on Timber Engineering, Santiago, Chile [Online]

This paper investigates if the relationship between the global and local moduli of elasticity (MoE), measured in bending tests, is affected by the test machines employed, and how that may influence strength grading. The ultimate aim is to study the p... Read More about Test Machine Effect in the determination of modulus of elasticity for strength-graded timber.