Abstract
Young's modulus along the grain (elasticity, E) was measured on 10 sections of branches and three tree trunks, with bark, of Picea sitchensis (Bong.) Carr., Pinus contorta Dougl. ex Loud., Larix decidua Mill. and Betula pendula Roth. syn. verrucosa Ehrh. The sections were simply supported and corrections were made for taper and deflection due to shear. The E values for trunks were at the lower end of the range reported for green timber (2.4-7.5 GPa), and those for branches were still lower (0.7-4.6 GPa). Values of E for branches decreased with decrease in specific gravity, which corresponded with an increase in percentage water content. When E values were calculated using underbark diameters they fell more closely within the range reported for green timber.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
