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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.

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.

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.

Impulse excitation measurement of small changes in elastic moduli and damping using R (2018)
Journal Article
Ridley-Ellis, D., Libeau, M., & Mignerat, D. (2018). Impulse excitation measurement of small changes in elastic moduli and damping using R. International Wood Products Journal, 1-6. https://doi.org/10.1080/20426445.2018.1475928

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 possible t... Read More about Impulse excitation measurement of small changes in elastic moduli and damping using R.

TG1/201804/25rev Derivation of MTG grading machine settings for Douglas fir (IE & GB, C classes) (2018)
Report
Ridley-Ellis, D., & Gil-Moreno, D. (2018). TG1/201804/25rev Derivation of MTG grading machine settings for Douglas fir (IE & GB, C classes). Ljubljana: WoodProps for Ireland project

Grading machines
MTG 960
mtgBATCH 962 mtgBATCH 966
MTG 920
mtgBATCH 922
mtgBATCH 926

Douglas fir (Pseudotsuga menziesii)
(PSMN)

Permitted timber sizes
Thickness: 33 mm to 84 mm
Width: 68 mm to 248 mm

C35/16
C27/16,
C24/C16, C24/14... Read More about TG1/201804/25rev Derivation of MTG grading machine settings for Douglas fir (IE & GB, C classes).

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

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

TG1/201703/25rev Derivation of Viscan and Viscan portable without balance grading machine settings for British Spruce (2017)
Report
Ridley-Ellis, D. (2017). TG1/201703/25rev Derivation of Viscan and Viscan portable without balance grading machine settings for British Spruce. CEN TC124 WG2 TG1: MiCROTEC

Viscan
Viscan portable WITHOUT balance

MiCROTEC GmbH
Julius Durst Str. 98
IT-39042 Brixen (BZ)
www.microtec.eu

United Kingdom of Great Britain and Northern Ireland + Republic of Ireland

Sitka spruce [Picea sitchensis]
Norway spruce [Pic... Read More about TG1/201703/25rev Derivation of Viscan and Viscan portable without balance grading machine settings for British Spruce.

TG1/201703/21rev Derivation of Goldeneye 702 grading machine settings for British Spruce (2017)
Report
Ridley-Ellis, D. (2017). TG1/201703/21rev Derivation of Goldeneye 702 grading machine settings for British Spruce. CEN TC124 WG2 TG1: MiCROTEC

Goldeneye 702

MiCROTEC GmbH
Julius Durst Str. 98
IT-39042 Brixen (BZ)
www.microtec.eu

United Kingdom of Great Britain and Northern Ireland + Republic of Ireland

Sitka spruce [Picea sitchensis]
Norway spruce [Picea abies]
(WPCS)


34... Read More about TG1/201703/21rev Derivation of Goldeneye 702 grading machine settings for British Spruce.

TG1/201703/22rev Derivation of Goldeneye 706 grading machine settings for British Spruce (2017)
Report
Ridley-Ellis, D. (2017). TG1/201703/22rev Derivation of Goldeneye 706 grading machine settings for British Spruce. CEN TC124 WG2 TG1: MiCROTEC

Goldeneye 706

MiCROTEC GmbH
Julius Durst Str. 98
IT-39042 Brixen (BZ)
www.microtec.eu

United Kingdom of Great Britain and Northern Ireland + Republic of Ireland

Sitka spruce [Picea sitchensis]
Norway spruce [Picea abies]
(WPCS)


34... Read More about TG1/201703/22rev Derivation of Goldeneye 706 grading machine settings for British Spruce.

TG1/201703/23rev Derivation of Viscan Compact and Viscan portable with balance grading machine settings for British Spruce (2017)
Report
Ridley-Ellis, D. (2017). TG1/201703/23rev Derivation of Viscan Compact and Viscan portable with balance grading machine settings for British Spruce. CEN TC124 WG2 TG1: MiCROTEC

Viscan Compact
Viscan portable WITH balance

MiCROTEC GmbH
Julius Durst Str. 98
IT-39042 Brixen (BZ)
www.microtec.eu

United Kingdom of Great Britain and Northern Ireland + Republic of Ireland

Sitka spruce [Picea sitchensis]
Norway spruce... Read More about TG1/201703/23rev Derivation of Viscan Compact and Viscan portable with balance grading machine settings for British Spruce.

TG1/201703/26rev Derivation of MTG 960 grading machine settings for UK larch (2017)
Report
Ridley-Ellis, D. (2017). TG1/201703/26rev Derivation of MTG 960 grading machine settings for UK larch. CEN TC124 WG2 TG1: Dan Ridley-Ellis

MTG 960

Brookhuis Micro Electronics bv
Institutenweg 15
7521 PH Enschede
The Netherlands

United Kingdom of Great Britain and Northern Ireland

European larch Larix decidua
Hybrid larch Larix x eurolepsis
Japanese larch Larix kaempferi... Read More about TG1/201703/26rev Derivation of MTG 960 grading machine settings for UK larch.

TG1/201703/27rev Derivation of MTG 960 grading machine settings for British Spruce (2017)
Report
Ridley-Ellis, D. (2017). TG1/201703/27rev Derivation of MTG 960 grading machine settings for British Spruce. CEN TC124 WG2 TG1: Dan Ridley-Ellis

MTG 960


Brookhuis Micro Electronics bv
Institutenweg 15
7521 PH Enschede
The Netherlands

United Kingdom of Great Britain and Northern Ireland + Republic of Ireland

Sitka spruce (Picea sitchensis)
Norway spruce (Picea abies)
(WPCS)... Read More about TG1/201703/27rev Derivation of MTG 960 grading machine settings for British Spruce.

TG1/201703/24rev Derivation of Viscan Plus grading machine settings for British Spruce (2017)
Report
Ridley-Ellis, D. (2017). TG1/201703/24rev Derivation of Viscan Plus grading machine settings for British Spruce. CEN TC124 WG2 TG1: MiCROTEC

Viscan Plus

MiCROTEC GmbH
Julius Durst Str. 98
IT-39042 Brixen (BZ)
www.microtec.eu

United Kingdom of Great Britain and Northern Ireland + Republic of Ireland

Sitka spruce [Picea sitchensis]
Norway spruce [Picea abies]
(WPCS)


34 mm... Read More about TG1/201703/24rev Derivation of Viscan Plus grading machine settings for British Spruce.

An update on grading timber for structural use (2017)
Book Chapter
Mansfield-Williams, H., & Ridley-Ellis, D. (2017). An update on grading timber for structural use. In TRADA Timber Industry Yearbook 2017 (148-155)

The quality of timber varies and, while we have little control over tree growth compared to industrial manufacturing processes, we do know many of the factors that influence wood properties. Both the species
and the growth region are important since... Read More about An update on grading timber for structural use.

Timber properties of noble fir, Norway spruce, western red cedar and western hemlock grown in Great Britain (2016)
Report
Gil-Moreno, D., Ridley-Ellis, D., & McLean, P. (2016). Timber properties of noble fir, Norway spruce, western red cedar and western hemlock grown in Great Britain. Great Britain: Forest Research

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 led to an int... Read More about Timber properties of noble fir, Norway spruce, western red cedar and western hemlock grown in Great Britain.

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.