The Effect of Timber Density and Type of Adhesive on the Strength of Finger-joints in S.A. Pine and<i>Eucalyptus grandis</i>

Rensburg, B.W.J. Van; Burdzik, W.M.G.; Ebersohn, W; Cillié, C.

doi:10.1080/00382167.1987.9630068

Cited by 3 publications

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“…Tests done on over 590 finger joints in Eucalyptus grandis by van Rensburg (1987) showed them to have a mean failure stress in tension of 36,37 MPa with a coefficient of variation of 24,7 %.…”

Section: Resultsmentioning

confidence: 99%

“…The member would then still have minor natural defects. Tests have shown that it is possible to end joint boards with finger joints and that these joints will have strengths in excess of the timber with minor defects, (Van Rensburg et al, 1987). However, when laminated timber beams are tested, members on the lower end of the strength distribution have usually shown initial failure at a finger joint in the extreme tension laminate rather than at a natural strength-reducing feature (Burdzik, 1989Ehlbeck et al, 1985 a, b, c).…”

Section: Introductionmentioning

confidence: 96%

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Finger Joint Strength. A Laminated Beam Strength Predictor?

Burdzik

1997

The Southern African Forestry Journal

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Finger Joint Strength. A Laminated Beam Strength Predictor?

Burdzik

1997

The Southern African Forestry Journal

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Number of Strength Reducing Features—How does it Affect the Strength of Laminated Beams?

Burdzik

1996

South African Forestry Journal

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SYNOPSISTest done by the author and others have shown that the strength oflaminated beams is usually governed by the strength of the finger joints in the extreme tension laminate. The author illustrates how the influence of the number of finger joints in a laminate can be quantified. He also points out that the variability of the finger joint strength can have a big influence on the strength, especially at the lower end of the strength distribution.The stress in laminate 1 is 70 % ofstress in laminate 2. The load sharing factor is thus 1,429.If one now assumes that the laminate with the knot is weaker than the defect-free laminate and that failure will occur in the knot, it is possible to calculate the "reinforcement" offered to the knot. The total load carried by the combined member is given by:

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