Just a bit of a self-satisfied smugness really because I've just received my author's copy of the third print run of my book. It's been reworked somewhat adding about 1300 words to section 6.6 which was all about calculating wood moisture content. The reason for the reworking was to bring into the discussion the difference between calculating wood moisture content using the 'dry basis' (db) and the 'wet basis' (wb).
We woodworkers and our wood suppliers use the dry basis to calculate wood MC after oven drying wood samples, but the wet basis methodology is the one used by the biomass fuel sector. The reason for including discussion of this 'wet basis' topic at this newest print run was because the UK government, for one, has fairly recently introduced legislation to reduce pollution caused by burning biomass fuel that is deemed to be overly wet. So, although this biomass fuel sector is perhaps somewhat tangential to our wood and woodworking focus I thought it was important for us to have some awareness of the topic.
Some of you may have noticed bags of logs for sale labelled 'Ready to Burn'. This indicates that the wood is certified by the supplier to be at or below 20% MC as calculated by using the 'wet basis' for determining moisture content. The wet basis for assessing wood MC always results in a lower value than using the dry basis. Interestingly, for example, 20%MC (wb) works out as 25%MC (db).
Anyway, a couple of images below. Slainte.
We woodworkers and our wood suppliers use the dry basis to calculate wood MC after oven drying wood samples, but the wet basis methodology is the one used by the biomass fuel sector. The reason for including discussion of this 'wet basis' topic at this newest print run was because the UK government, for one, has fairly recently introduced legislation to reduce pollution caused by burning biomass fuel that is deemed to be overly wet. So, although this biomass fuel sector is perhaps somewhat tangential to our wood and woodworking focus I thought it was important for us to have some awareness of the topic.
Some of you may have noticed bags of logs for sale labelled 'Ready to Burn'. This indicates that the wood is certified by the supplier to be at or below 20% MC as calculated by using the 'wet basis' for determining moisture content. The wet basis for assessing wood MC always results in a lower value than using the dry basis. Interestingly, for example, 20%MC (wb) works out as 25%MC (db).
Anyway, a couple of images below. Slainte.

