The effect of wanes on bending strength and MOE was analyzed by multiple regression analyses using [DELTA][W.
The effect of wanes on MOE is presented in Model 2.
Fracture is often initiated near knots, where the wanes may be smaller due to larger log diameter close to the whorls.
Some of this difference can be explained by the lack of section due to wanes, since squares were calculated based on rectangular section.
7 percent of that of a rectangular section without wanes.
Wanes reduce the moment capacity of squares in bending, but the effect is smaller than one should expect from the loss of section, and it is of minor importance compared with the effects of density and relative knot diameter.
The effect of wanes on the bending strength of solid timber beams.
The aim was to get squares with 2/3 sawn surfaces and 1/3 wane at the midpoint.
Squares were visually graded according to requirements for knots, grain angle, and annual ring width in INSTA 142 (Standards Norway 1997), both with and without taking wane into account (Table 4).