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Dr Dan Ridley-Ellis' Outputs (197)

Alternative UK timber species (2021)
Book Chapter
Adams, S., & Ridley-Ellis, D. (2021). Alternative UK timber species. In Timber 2021 Industry Yearbook (104-111). TRADA

Steven Adams and Dan Ridley-Ellis discuss the findings of a recent research project into the properties and potential uses of lesser-used species in the UK.

Grade in Britain: enabling a wider range of home grown species (2021)
Book Chapter
Ridley-Ellis, D. (2021). Grade in Britain: enabling a wider range of home grown species. In Timber 2020 Industry Yearbook (132-137). TRADA

Dan Ridley-Ellis summarises the different home-grown species currently available, and looks to the future of strength grading for an increasingly wide range of species.

Estimating mechanical properties of clear wood from ten‐year‐old Melia azedarach trees using the stress wave method (2021)
Journal Article
Van Duong, D., & Ridley-Ellis, D. (2021). Estimating mechanical properties of clear wood from ten‐year‐old Melia azedarach trees using the stress wave method. European Journal of Wood and Wood Products, 79(4), 941-949. https://doi.org/10.1007/s00107-021-01664-8

The objective of this study was to examine the potential of stress wave velocity (SWV) as a rapid and non-destructive method to estimate the mechanical properties of Melia azedarach wood. The SWV, dynamic modulus of elasticity (MOE d), modulus of ela... Read More about Estimating mechanical properties of clear wood from ten‐year‐old Melia azedarach trees using the stress wave method.

A brief look at alternative species in the UK (2021)
Presentation / Conference Contribution
Adams, S. H., & Ridley-Ellis, D. J. (2020, December). A brief look at alternative species in the UK. Presented at Northern European Network for Wood Science and Engineering – WSE2020, Online (Helsinki)

A case study of timber demolition recycling in the UK (2021)
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)

InFutURe Wood Report 1: Design for deconstruction and reuse of timber structures – state of the art review (2020)
Report
Cristescu, C., Honfi, D., Sandberg, K., Sandin, Y., Shotton, E., Walsh, S., Cramer, M., Ridley-Ellis, D., Risse, M., Ivanica, R., Ui Chulain, C., Harte, A., De Arana-Fernandez, M., Llana, D., Iniguez-Gonzalez, G., Garcia Barbero, M., Nasiri, B., Hughes, M., & Krofl, Z. (2020). InFutURe Wood Report 1: Design for deconstruction and reuse of timber structures – state of the art review. ForestValue

This report represents the first publication of the InFutURe Wood project - Innovative Design for the Future – Use and Reuse of Wood (Building) Components.
InFutUReWood is supported under the umbrella of ERA-NET and financed by funding agencies from... Read More about InFutURe Wood Report 1: Design for deconstruction and reuse of timber structures – state of the art review.

Some awkward questions about density (2020)
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.

A Shed Resource: A look at Wood Recycling in the UK (2020)
Presentation / Conference Contribution
Cramer, M., & Ridley-Ellis, D. (2020, September). A Shed Resource: A look at Wood Recycling in the UK. Paper presented at Timber 2020, Online

The secondary timber value chain was explored by interviewing companies involved in wood recycling. The interviewees include community wood recyclers, chip producers and board-making companies. This paper is a perspective of the wood recycling indust... Read More about A Shed Resource: A look at Wood Recycling in the UK.

Analysis of a wooden specimen's mechanical properties through acoustic measurements in the very near field (2020)
Journal Article
Pantelić, F., Mijić, M., Šumarac Pavlović, D., Ridley-Ellis, D., & Dudeš, D. (2020). Analysis of a wooden specimen's mechanical properties through acoustic measurements in the very near field. Journal of the Acoustical Society of America, 147(4), EL320-EL325. https://doi.org/10.1121/10.0001030

This paper presents the method for prediction of some basic mechanical parameters of a wood specimen by using simple instrumentation. The standard acoustic method for assessment of modulus of elasticity using the impulse excitation is extended by usi... Read More about Analysis of a wooden specimen's mechanical properties through acoustic measurements in the very near field.

The Mechanical and Resonance Assessment of Large Clear Samples of UK-Grown Beech Wood (2019)
Journal Article
Ridley-Ellis, D. (2019). The Mechanical and Resonance Assessment of Large Clear Samples of UK-Grown Beech Wood. Pro Ligno, 15(4), 32-39

The paper presents the results of non-destructive longitudinal resonance (impulse excitation technique), and mechanical flexural testing, of a batch of European beech wood (Fagus sylvatica L.), grown in the United Kingdom. The material was largely fr... Read More about The Mechanical and Resonance Assessment of Large Clear Samples of UK-Grown Beech Wood.

Grading of British spruce cladding battens by ring width for density, fastener performance and fire (2019)
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 (2019)
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 use of a visual grading code of practice in the UK in the assessment of the mechanical properties of in situ structural timber elements (2019)
Presentation / Conference Contribution
Bather, M. J., & Ridley-Ellis, D. J. (2019, September). The use of a visual grading code of practice in the UK in the assessment of the mechanical properties of in situ structural timber elements. Presented at 5th International Conference on Structural Health Assessment of Timber Structures (SHATiS), Guimarães, Portugal

The estimation of the mechanical properties of in situ timber elements is an essential part of the structural appraisal of many existing buildings and structures. Currently, in the UK, this appraisal
of load-bearing timber is generally carried out b... Read More about The use of a visual grading code of practice in the UK in the assessment of the mechanical properties of in situ structural timber elements.

Use of Nondestructive Techniques for Determination of Tension Parallel-to-Grain Properties of Spruce (2019)
Presentation / Conference Contribution
Gil-Moreno, D., O'Ceallaigh, C., Ridley-Ellis, D., & Harte, A. M. (2019, September). Use of Nondestructive Techniques for Determination of Tension Parallel-to-Grain Properties of Spruce. Presented at 21st International Nondestructive Testing and Evaluation of Wood Symposium, Freiburg, Germany

The paper presents a study of the tension properties of Irish-grown Sitka spruce. Fifty timber pieces were destructively tested having resonant frequency and knots measured. The aim was to improve knowledge of the performance of spruce in tension and... Read More about Use of Nondestructive Techniques for Determination of Tension Parallel-to-Grain Properties of Spruce.

Quantification of chemical changes taking place in spruce wood structure following long period thermal treatment (2019)
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.

Timber grading potential of Douglas fir in the Republic of Ireland and the UK (2019)
Journal Article
Gil-Moreno, D., Ridley-Ellis, D., & Harte, A. (2019). Timber grading potential of Douglas fir in the Republic of Ireland and the UK. International Wood Products Journal, 10(2), 64-69. https://doi.org/10.1080/20426445.2019.1617984

Results of the recently approved machine control grading settings for Douglas fir in the Republic of Ireland and the UK have shown that the species can be graded to C18, and higher strength classes, and while there is a relatively high proportion of... Read More about Timber grading potential of Douglas fir in the Republic of Ireland and the UK.

Lesser-used UK-grown timber (2019)
Book Chapter
Ridley-Ellis, D. (2019). Lesser-used UK-grown timber. In TRADA Timber Industry Yearbook 2019 (200-205)

Daniel Ridley-Ellis looks at the grading properties of different species in comparison with the highly commercial Sitka spruce.

Grading of British Timber (2018)
Journal Article
Ridley-Ellis, D. (2018). Grading of British Timber. The Full Circle: The Journal of the Association of Scottish Hardwood Sawmillers, 34-36

A summary of grading of home grown timber for the magazine of the Association of Scottish Hardwood Sawmillers (ASHS).

Some thresholds for grading British grown spruce to optimised strength classes using longitudinal resonance (2018)
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.