What I’ve done is taken each of the four tests of wood strength (Janka hardness, MOE, MOR, and crushing strength) and found which species were the best and worst in that category, and then use those values as the upper and lower limits. (This is limited to the data I have on hand...
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Cellulose contributes to the toughness and strength of wood, while lignin adds hardness and rigidity. Meanwhile, hemicelluloses have been suggested to link the lignin and cellulose components [150], [151]. The origin of wood elasticity at the molecular view owes to the contributions from multiple...
A common measurement of wood hardness is thejanka hardness test. The test measures the amount of force required to embed a .444″ diameter steel ball halfway into the wood. The results for each of the maple species are shown in the chart below. Now it may look like hard maple is heads...
They reported that varnished heat-treated wood had better performance (color change and hardness) than varnished untreated wood samples, while painted samples had similar performance on both heat-treated and untreated wood. Jamsa et al. [16] studied the weathering performance of four different ...
Figure 3. Pie chart of GHG emissions from the energy industries in terms of GHG sources in 2018 [18]. Table 1. Taiwan’s GHG emissions from the energy industries in terms of categories of GHG since 2010 1. Table 2. Taiwan’s GHG emissions from the energy industries in terms of GHG...
The poster, Worldwide Woods, Ranked by Hardness, should be required reading for anyone enrolled in the school of wood nerdery. I have amassed over 500 wood species on a single poster, arranged into eight major geographic regions, with each wood sorted and ranked according to its Janka hardnes...