Outputs (46)

Hardwoods in the United Kingdom Considerations When Looking to Future Planting and Future Value Chains (2024)
Presentation / Conference Contribution
Ridley-Ellis, D., & Cramer, M. (2024, September). Hardwoods in the United Kingdom Considerations When Looking to Future Planting and Future Value Chains. Presented at International Scientific Conference on Hardwood Processing, Coimbra, Portugal

Reasons for increasing the diversity of the tree species providing wood for the value chain include: improving forest resilience to climate change; mitigating the risks of pests and pathogens; and improving other important functions of forests such a... Read More about Hardwoods in the United Kingdom Considerations When Looking to Future Planting and Future Value Chains.

A proposed standardization framework for recovered timber strength grading (2024)
Presentation / Conference Contribution
Llana, D. F., Ridley-Ellis, D., Turk, G., & Íñiguez-González, G. (2024, June). A proposed standardization framework for recovered timber strength grading. Presented at III Congreso Ibero-Latinoamericano MAD de la Madera en la Construcción (CIMAD 24) : Libro de Actas de Resúmenes Extendidos, Madrid

An increasing quantity of wood is recovered from demolitions, presenting opportunities for enhanced value through reusing or recycling in structural uses. Prior to utilizing timber for structural applications, it is essential to subject it to a gradi... Read More about A proposed standardization framework for recovered timber strength grading.

The Presidents of the Institute of Wood Science (2024)
Journal Article
True, A., Ridley-Ellis, D., Spear, M., & Ansell, M. P. (in press). The Presidents of the Institute of Wood Science. International Wood Products Journal, https://doi.org/10.1177/20426445241246844

The Institute of Wood Science (IWSc) represented the interests and knowledge of wood scientists and wood technologists in the UK and beyond between 1955 and 2009 when it merged with the Institute of Materials, Minerals and Mining (IOM3). In that time... Read More about The Presidents of the Institute of Wood Science.

BM TRADA Webinar Part 2: Machine Strength Grading (2024)
Presentation / Conference Contribution
Ridley-Ellis, D. (2024, April). BM TRADA Webinar Part 2: Machine Strength Grading. Presented at BM TRADA Technical Timber Webinars 2024, Online

Strength grading of solid timber – overcoming some common misconceptions.

Slides covering machine strength grading, stamps, and EN1912 revision

Wood properties and uses of larch in Great Britain (2024)
Report
McLean, P., Ridley-Ellis, D., Price, A., & Macdonald, E. (2024). Wood properties and uses of larch in Great Britain. Surrey: Forest Research

This report collates and synthesises research into the production and use of larch timber in Great Britain, drawing on information from a range of published and unpublished studies. It is written for forest scientists, engineers, wood processors and... Read More about Wood properties and uses of larch in Great Britain.

Models to predict the radial variation of stiffness, strength, and density in planted noble fir, Norway spruce, western hemlock, and western red cedar in Great Britain (2023)
Journal Article
Gil-Moreno, D., MClean, J. P., & Ridley-Ellis, D. (2023). Models to predict the radial variation of stiffness, strength, and density in planted noble fir, Norway spruce, western hemlock, and western red cedar in Great Britain. Annals of Forest Science, 80, Article 48. https://doi.org/10.1186/s13595-023-01214-7

Key message: This study compares the measured radial variation in wood stiffness, strength, and density of noble fir, Norway spruce, western hemlock, and western red cedar by developing mixed-effects models for each property using age as the explanat... Read More about Models to predict the radial variation of stiffness, strength, and density in planted noble fir, Norway spruce, western hemlock, and western red cedar in Great Britain.

A horizon scan of issues affecting UK forest management within 50 years (2023)
Journal Article
Tew, E. R., Ambrose-Oji, B., Beatty, M., Büntgen, U., Butterworth, H., Clover, G., Cook, D., Dauksta, D., Day, W., Deakin, J., Field, A., Gardiner, B., Harrop, P., Healey, J. R., Heaton, R., Hemery, G., Hill, L., Hughes, O., Khaira-Creswell, P. K., Kirby, K., …Sutherland, W. J. (2024). A horizon scan of issues affecting UK forest management within 50 years. Forestry, 97(3), Article cpad047. https://doi.org/10.1093/forestry/cpad047

Forests are in the spotlight: they are expected to play a pivotal role in our response to society’s greatest challenges, such as the climate and biodiversity crises. Yet, the forests themselves, and the sector that manages them, face a range of inter... Read More about A horizon scan of issues affecting UK forest management within 50 years.

Wood properties & strength grading (2022)
Presentation / Conference Contribution
Ridley-Ellis, D. (2022, December). Wood properties & strength grading. Presented at James Jones & Sons Architects' and Structural Engineers' Open Day, Lockerbie

James Jones & Sons held an open day for architects and structural engineers at its flagship sawmill site in Lockerbie.

"James Jones & Sons' new visitor building at its flagship sawmill site in Lockerbie has attracted considerable interest in the... Read More about Wood properties & strength grading.

Can you guess the strength of timber? How (your) wood quality perceptions relate to reality (2022)
Presentation / Conference Contribution
Cramer, M., & Ridley-Ellis, D. (2022, September). Can you guess the strength of timber? How (your) wood quality perceptions relate to reality. Paper presented at Northern European Network for Wood Science and Engineering (WSE) 2022, Goettingen, Germany

UK-grown timber is often perceived to have “low quality”, and most of the UK’s sawn timber is used for fencing and packaging material. Much of the resource could be used as construction timber, as UK spruce and other softwoods can be strength graded... Read More about Can you guess the strength of timber? How (your) wood quality perceptions relate to reality.

Correction of Evanescent Wave Influence on the Flexural Wave Velocity and Wavelength Estimation Based on a Mode Shape Function (2022)
Journal Article
Pantelić, F., Šumarac Pavlović, D., Mijić, M., & Ridley-Ellis, D. (2022). Correction of Evanescent Wave Influence on the Flexural Wave Velocity and Wavelength Estimation Based on a Mode Shape Function. Archives of Acoustics, 47(4), 539-546. https://doi.org/10.24425/aoa.2022.142017

The aim of this research is to use a simple acoustic method of a very near field recording, which enables measurement and display of oscillation modes, to estimate the velocity of flexural waves, based on the wavelengths of standing waves measured on... Read More about Correction of Evanescent Wave Influence on the Flexural Wave Velocity and Wavelength Estimation Based on a Mode Shape Function.

The relationship between bending and tension strength of Irish and UK spruce and pine (2022)
Journal Article
Gil-Moreno, D., Ridley-Ellis, D., O'Ceallaigh, C., & Harte, A. M. (2022). The relationship between bending and tension strength of Irish and UK spruce and pine. European Journal of Wood and Wood Products, 80, 585-596. https://doi.org/10.1007/s00107-022-01787-6

The correct characterisation of wood properties is fundamental for the best utilisation of resources. In Europe, grading is defined by strength classes that are determined based on either bending or tension tests. The European standards give equation... Read More about The relationship between bending and tension strength of Irish and UK spruce and pine.

Test Machine Effect in the determination of modulus of elasticity for strength-graded timber (2021)
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.

Perception and use of timber in construction: A case study of Ireland and the UK (2021)
Presentation / Conference Contribution
O'Ceallaigh, C., Gil-Moreno, D., Ridley-Ellis, D., & Harte, A. M. (2021, August). Perception and use of timber in construction: A case study of Ireland and the UK. Presented at WCTE 2021: World Conference on Timber Engineering, Santiago, Chile [Online]

A survey was carried out to examine the perception of timber in construction among industry stakeholders within northwest Europe. The survey received responses from 17 countries in total. The total results of all respondents are presented along with... Read More about Perception and use of timber in construction: A case study of Ireland and the UK.

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 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)

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)

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.