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All Outputs (74)

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

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.

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

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.

The daily cycle of moisture content expansion and contraction in UK-grown Sitka spruce trees (2018)
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.

Strength grading of timber in the UK in 2018 (2018)
Presentation / Conference Contribution
Ridley-Ellis, D. (2018, June). Strength grading of timber in the UK in 2018. Paper presented at Timber 2018, London

This paper summarises the state-of-the-art of strength grading of UK-grown timber. It lists the following information along with the primary references: visual grading grades and strength class assignments; grading machines with approved settings for... Read More about Strength grading of timber in the UK in 2018.

Equipping ourselves for future forests and timber. (2018)
Presentation / Conference Contribution
Ridley-Ellis, D. (2018, May). Equipping ourselves for future forests and timber. Presented at Institute of Chartered Foresters National Conference

Presentation to the Institute of Chartered Foresters National Conference, "Innovation for change - New drivers for tomorrow’s forestry" Edinburgh 2-3 May 2013 https://www.charteredforesters.org/

Home grown timber now and in the future. (2017)
Presentation / Conference Contribution
Ridley-Ellis, D. (2017, November). Home grown timber now and in the future. Presented at WTS British Timber Seminar

Presentation to the wood technology society "British Timber Seminar" at IOM3, November 2017

Timber grading update (2017)
Presentation / Conference Contribution
Ridley-Ellis, D. (2017, November). Timber grading update. Presented at SIRT update seminar

The latest news on timber grading standards and how they effect structural timber production in UK and IE

Assessing timber quality. (2017)
Presentation / Conference Contribution
Ridley-Ellis, D. (2017, October). Assessing timber quality. Presented at 1st National Forestry and Aboriculture Student Conference, Moulton College, Moulton, Northamptonshire

Presentation about technology for assessing timber quality, at the Royal Forestry Society Future Foresters Technology Day (1st National Forestry and Aboriculture Student Conference)

Assessing timber quality (2017)
Presentation / Conference Contribution
Ridley-Ellis, D. (2017, October). Assessing timber quality. Presented at Royal Forestry Society Future Technology Conference, Moulton College, Northants

The use of technology for assessing and monitoring timber quality in the forest and at harvesting

Bringing new species to the market place (2017)
Presentation / Conference Contribution
Ridley-Ellis, D. (2017, May). Bringing new species to the market place. Presented at EFIATLANTIC AND IEFC ANNUAL MEETING The Role of Alternative Tree Species in the Forests of Atlantic Europe

Timber grading (2017)
Presentation / Conference Contribution
Ridley-Ellis, D. (2017, May). Timber grading. Presented at Tree Breeding and Forest Products - An update on current research

Grading structural timber. (2016)
Presentation / Conference Contribution
Ridley-Ellis, D. (2016, September). Grading structural timber. Presented at CPD Seminar Structural Timber Engineering

Grading structural timber.

Timber material properties. (2016)
Presentation / Conference Contribution
Ridley-Ellis, D. (2016, September). Timber material properties. Presented at CPD Seminar Structural Timber Engineering

Timber material properties, grading techniques and ways of optimising selection.

Thinking beyond the usual strength grades – with examples of British spruce and larch (2016)
Presentation / Conference Contribution
Ridley-Ellis, D., Adams, S., & Lehneke, S. (2016). Thinking beyond the usual strength grades – with examples of British spruce and larch. In Proceedings of the World Conference on Timber Engineering (WCTE 2016), August 22-25, 2016, Vienna, Austria, Eds

This paper summarises the processes and normative requirements involved in grading of structural timber, and outlines a number of areas in which matters may be improved, so as to make better use of the true properties of the timber resource used. The... Read More about Thinking beyond the usual strength grades – with examples of British spruce and larch.

Using the right Modulus of Elasticity to get the best grades out of softwood timber species in Great Britain (2016)
Presentation / Conference Contribution
Gil-Moreno, D., Ridley-Ellis, D., & McLean, P. (2016). Using the right Modulus of Elasticity to get the best grades out of softwood timber species in Great Britain. In WCTE 2016 World Conference on Timber Engineering e-book Full Papers

The correct characterisation of modulus of elasticity in bending is fundamental for timber grading, especially when that property limits the allocation to a strength class. The aim of this paper is to empirically determine the relationship between EN... Read More about Using the right Modulus of Elasticity to get the best grades out of softwood timber species in Great Britain.

Combining of results from visual inspection, non-destructive testing and semi-destructive testing to predict the mechanical properties of Western Hemlock (2016)
Presentation / Conference Contribution
Bather, M., Ridley-Ellis, D., & Gil-Moreno, D. (2016, August). Combining of results from visual inspection, non-destructive testing and semi-destructive testing to predict the mechanical properties of Western Hemlock. Paper presented at World Conference o

Current methods of assessing the mechanical properties of in-situ timber are limited, particularly with regard to estimating bending strength and stiffness. The aim of this research is to combine non-destructive testing (NDT), visual inspection and t... Read More about Combining of results from visual inspection, non-destructive testing and semi-destructive testing to predict the mechanical properties of Western Hemlock.

Analysis of acoustical properties of wood and mode identification by sample scanning in the very near field (2016)
Presentation / Conference Contribution
Pantelić, F., Šumarac Pavlović, D., Mijić, M., & Ridley-Ellis, D. (2016). Analysis of acoustical properties of wood and mode identification by sample scanning in the very near field. In Zbornik apstrakata i program 60.konferencije ETRAN, Zlatibor

It is possible to achieve a good visualization of vibration modes by microphone scanning of a vibration excited sample of wood in very near field. The experimental settings, shown in this paper, were used for wood properties characterization and obse... Read More about Analysis of acoustical properties of wood and mode identification by sample scanning in the very near field.

Making the grade and maximising the opportunities. (2016)
Presentation / Conference Contribution
Ridley-Ellis, D. (2016, April). Making the grade and maximising the opportunities. Presented at Institute of Chartered Foresters 2016 National Conference “The Timber Supply Chain – Dynamics and Opportunities”

Institute of Chartered Foresters National Conference 2016 Invited presentation covering: A quick explanation of key properties of wood, relevant to construction The extent of variation in these properties, between and within species – and the... Read More about Making the grade and maximising the opportunities..

The timber resource in G. B.-more species for new challenges. (2016)
Presentation / Conference Contribution
Gil-Moreno, D., Ridley-Ellis, D., & McLean, P. (2016, April). The timber resource in G. B.-more species for new challenges. Paper presented at Young Researchers’ Forum III: Innovation in Construction Materials

Timber in Great Britain is mostly produced from Sitka spruce (Picea sitchensis). Biotic threats have led tree growers to consider the planting of a wider range of species to offer a more resilient forest. There is little information on how this will... Read More about The timber resource in G. B.-more species for new challenges..