The strength of tiling battens (UK)
BS 5534:2014+A2:2018, the UK code of practice for slating and tiling for pitched roofs and vertical cladding, contains rules for visual grading of tiling battens. […]
EN338
C and D – what do they stand for?
The European Standard EN 338 contains a list of strength classes for structural timber. There is a set primarily for softwoods which begin with the […]
Do not trust this blog (fully)
You will often find things written in books, webpages, information sheets, course notes, and webpages (including this blog) – which tells you what is written […]
What is the density of wood?
This is one of those simple sounding questions that has a lot of possible answers. For now, let’s keep it simple and ask something more […]
When is a standard not a standard?
…or why you should not buy EN 14081-1:2016. As we have discussed before (here and here), Harmonized Standards have a special status in that they […]
Why grading isn’t about the grade
The strength grading of timber is not about the strength grade – it is about the properties of the timber. A strength grade (or, more […]
5th percentile shear modulus?
In the current version of Eurocode 5 (EN 1995-1-1:2004+A2:2014) you can find equations that relate to the lateral torsional buckling of beams. Equation 6.31 gives the […]
Thinking beyond strength classes
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 […]
Making the grade
This post is a ‘director’s cut’ version of Dan Ridley-Ellis’s (@flyingquercus) presentation at the Institute of Chartered Foresters 2016 National Conference “The Timber Supply Chain – Dynamics and […]
Grade in Britain
For a more up-to-date post on properties see Grade in Britain revisited. Introduction We looked at British spruce in a previous post. It is, for […]