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Table 2 Stresses at failure compared to the strength values obtained via testing. τ is the shear stress at failure; σc,90 is the compressive stress perpendicular to the grain at failure; fv is the experimentally measured shear strength parallel to the grain of the respective timber joist; fc,90 is the experimentally measured proportional limit of the compressive strength perpendicular to the grain of the respective timber joist

From: Structural performance of a novel Interlocking Glued Solid Timber system

Joist groupSeries
CDE
Edge-gluedParallel-gluedCross-glued
τ/fvσc,90/f90,cτ/fvσc,90/f90,cτ/fvσc,90/f90,c
1N/Aa77%a87%104%98%119%
277%104%83%114%94%129%
384%110%80%106%82%108%
477%104%67%92%81%110%
575%108%74%107%84%120%
Mean78%107%78%105%88%117%
CoV0.040.030.090.080.080.07
  1. aSpecimen failed in lateral-torsional buckling; not included in the calculation of the mean value