Daniel Ridley-Ellis
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View article: Circulating structural timber and engineered wood products – challenges and potentials towards reliable evaluation of mechanical properties
Circulating structural timber and engineered wood products – challenges and potentials towards reliable evaluation of mechanical properties Open
Publisher Copyright: © 2025 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
View article: The Presidents of the Institute of Wood Science
The Presidents of the Institute of Wood Science Open
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). I…
View article: 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
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 Open
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 th…
View article: A horizon scan of issues affecting UK forest management within 50 years
A horizon scan of issues affecting UK forest management within 50 years Open
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 ran…
View article: CONSIDERATIONS FOR GRADING SPECIES COMBINATIONS. THE EXAMPLE OF DOUGLAS FIR WITH LARCH IN IRELAND AND UK
CONSIDERATIONS FOR GRADING SPECIES COMBINATIONS. THE EXAMPLE OF DOUGLAS FIR WITH LARCH IN IRELAND AND UK Open
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 Sit…
View article: NON-PARAMETRIC LOWER CONFIDENCE BOUNDS FOR THE FIFTH PERCENTILE - EN 14358 IN COMPARISON TO A FULLY NON-PARAMETRIC APPROACH
NON-PARAMETRIC LOWER CONFIDENCE BOUNDS FOR THE FIFTH PERCENTILE - EN 14358 IN COMPARISON TO A FULLY NON-PARAMETRIC APPROACH Open
In Europe, fifth percentile values are required for the calculation of characteristic values of strength and density.The European standard EN 14358:2016 defined three ways to calculate a 75% lower confidence bound (LCB) for such fifth perc…
View article: CONSIDERATIONS FOR GRADING SPECIES COMBINATIONS. GENERAL REMARKS ON SCENARIOS AND REQUIREMENTS.
CONSIDERATIONS FOR GRADING SPECIES COMBINATIONS. GENERAL REMARKS ON SCENARIOS AND REQUIREMENTS. Open
This paper discusses the situations in which timber species might be combined in commercial combinations, and the considerations relating to strength grading work.It is expected that more species combinations will be developed in the years…
View article: Strength grading of timber in the UK and Ireland in 2021
Strength grading of timber in the UK and Ireland in 2021 Open
This paper summarises the state of the art for strength grading of construction timber grown in the United Kingdom and the Republic of Ireland. It includes the latest approvals based on recent research on spruce, larch and Douglas-fir. It …
View article: Perception and use of timber in construction: A case study of Ireland and the UK
Perception and use of timber in construction: A case study of Ireland and the UK Open
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 …
View article: Analysis of a wooden specimen's mechanical properties through acoustic measurements in the very near field
Analysis of a wooden specimen's mechanical properties through acoustic measurements in the very near field Open
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 exte…
View article: Use of nondestructive techniques for determination of tension parallel-to-grain properties of spruce
Use of nondestructive techniques for determination of tension parallel-to-grain properties of spruce Open
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 …
View article: Timber grading potential of Douglas fir in the Republic of Ireland and the UK
Timber grading potential of Douglas fir in the Republic of Ireland and the UK Open
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 pro…
View article: Impulse excitation measurement of small changes in elastic moduli and damping using R
Impulse excitation measurement of small changes in elastic moduli and damping using R Open
Impulse excitation is commonly used to assess wood stiffness in both scientific and industrial settings. Modes of vibration are excited by a mechanical impulse and their resonant frequencies measured to calculate elastic moduli. It is also…
View article: The performance of a new blind-bolt for moment-resisting connections
The performance of a new blind-bolt for moment-resisting connections Open
The paper introduces the principal findings of a testing programme carried out to assess the performance of a newly developed blind-bolt. The blind-bolt, an evolution of the Lindapter-Hollobolt, is intended for use when making moment-resis…
View article: Torsion tests on small and large-scale RHS with circular wall cut-outs
Torsion tests on small and large-scale RHS with circular wall cut-outs Open
The results of small and large-scale torsion tests on rectangular section tubes with circular wall perforations are presented and discussed. Perforations are shown to cause the torsional resistance to be re-duced by up to 60% and stiffness…
View article: Does home-grown make the grade?
Does home-grown make the grade? Open
Summary of research into the properties of UK-grown timber (relevant to grading for construction use).
View article: Making the grade and maximising the opportunities.
Making the grade and maximising the opportunities. Open
Institute of Chartered Foresters National Conference 2016 Invited presentation covering: A quick explanation of key properties of wood, relevant to constructionThe extent of variation in these properties, between and within species – and t…
View article: The timber resource in G. B.-more species for new challenges.
The timber resource in G. B.-more species for new challenges. Open
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…
View article: Timber grading seminar - Some things you should know about how strength grading works and what is changing in the standards.
Timber grading seminar - Some things you should know about how strength grading works and what is changing in the standards. Open
Presentations from the seminar on timber grading."This grading seminar will give you a crash course in timber strength grading, what it is, how it works, and how it is changing. It aims to demystify timber grading, tackle some widely held …
View article: Timber properties of noble fir, Norway spruce, western red cedar and western hemlock grown in Great Britain.
Timber properties of noble fir, Norway spruce, western red cedar and western hemlock grown in Great Britain. Open
The softwood processing sector in Great Britain has been built around the use of a very small number of timber producing species – predominantly Sitka spruce. The recent increase in outbreaks of host-specific tree pests and diseases has le…
View article: Combining of results from visual inspection, non-destructive testing and semi-destructive testing to predict the mechanical properties of Western Hemlock
Combining of results from visual inspection, non-destructive testing and semi-destructive testing to predict the mechanical properties of Western Hemlock Open
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 inspe…