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Outputs (144)

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.

Timber in Construction: Skills Action Plan (2023)
Report
Duncheva, M., Vokes, C., Connell-Skinner, K., & Hairstans, R. (2023). Timber in Construction: Skills Action Plan. Hereford: New Model Institute for Technology & Engineering (NMITE)

The UK needs to increase the use of timber in construction to achieve its Net Zero targets. But strengthening timber supply chains and boosting use of homegrown timber needs a workforce able to make best use of this renewable resource. The Timber... Read More about Timber in Construction: Skills Action Plan.

Non-parametric lower confidence bounds for the fifth percentile - EN 14358 in comparison to a fully non-parametric approach (2023)
Presentation / Conference Contribution
Weidenhiller, A., Ridley-Ellis, D., & Neumüller, A. (2023, June). Non-parametric lower confidence bounds for the fifth percentile - EN 14358 in comparison to a fully non-parametric approach. Presented at World Conference on Timber Engineering WCTE 2023: Timber for a Livable Future, Oslo, Norway

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 percentile val... Read More about Non-parametric lower confidence bounds for the fifth percentile - EN 14358 in comparison to a fully non-parametric approach.

A little about the verification of a lot (EN 14358) (2022)
Presentation / Conference Contribution
Ridley-Ellis, D. (2022, September). A little about the verification of a lot (EN 14358). Paper presented at Northern European Network for Wood Science and Engineering (WSE) 2022, Goettingen, Germany

Sometimes it is necessary to estimate the mean and/or percentile of a certain population by limited sampling, in order to compare with target values. Done properly, the method should account for random chance in the sampling so that the two risks can... Read More about A little about the verification of a lot (EN 14358).

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.

The assessment of the mechanical and physical properties of in situ timber (2022)
Presentation / Conference Contribution
Bather, M., & Ridley-Ellis, D. (2022, September). The assessment of the mechanical and physical properties of in situ timber. Paper presented at Northern European Network for Wood Science and Engineering (WSE) 2022, Goettingen, Germany

The refurbishment of existing buildings is a more sustainable option than demolition and reconstruction, leading to significant reductions in CO2 emissions and many other benefits. Policy across Europe is leaning more towards retaining and upgrading... Read More about The assessment of the mechanical and physical properties of in situ timber.

Wood Information Sheet WIS 2/3-67 Specifying British-grown timbers (2022)
Other
Ridley-Ellis, D. (2022). Wood Information Sheet WIS 2/3-67 Specifying British-grown timbers. [pdf]

The purpose of this Wood Information Sheet (WIS) is to summarise the characteristics, and the current and potential uses, of timber grown in the UK (England, Scotland, Wales and Northern Ireland), which we also refer to in this WIS as ‘British-grown... Read More about Wood Information Sheet WIS 2/3-67 Specifying British-grown timbers.

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.

Strength grading options for unusual resources (2023)
Presentation / Conference Contribution
Cramer, M., & Ridley-Ellis, D. (2023, October). Strength grading options for unusual resources. Paper presented at WSE: 19th Annual Meeting of the Northern European Network for Wood Science and Engineering, Oslo, Norway

Timber (2024)
Book Chapter
Cramer, M., & Tamagnone, G. (2024). Timber. In H. Hartman, & J. Jack Williams (Eds.), Materials: An environmental primer (230-253). RIBA