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Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image

Table 3 Results with the concentrated mass for the actual size round bar

From: Application of the vibration method with additional mass to timber guardrail beams

Attaching surface of the concentrated mass Attaching method of the concentrated mass End condition Specimen Vertical vibration Horizontal vibration
Top Two-sided adhesive tape Hanging with two threads Cedar3 0.89 (1,1) 1.45 (1,2)
Cedar4 0.91 (1,1) − 4.37 (1,2)
Cedar5 1.06 (1,1) − 5.96 (1,2)
Top Two-sided adhesive tape Iron round bar insertion Cedar3 1.04 (2,1) − (2,2)
Cedar4 0.72 (2,1) − (2,2)
Cedar5 1.20 (2,1) − (2,2)
Top Two-sided adhesive tape Loose attachment to the post Cedar3 1.02 (3,1) − 3.40 (3,2)
Cedar4 1.08 (3,1) − 458.80 (3,2)
Cedar5 1.06 (3,1) − 5.40 (3,2)
Top Two-sided adhesive tape Tight attachment to the post Cedar3 1.99 (4,1) − 2.71 (4,2)
Cedar4 2.35 (4,1) − 7.96 (4,2)
Cedar5 1.78 (4,1) − 10.25 (4,2)
Top Wood screw Hanging with two threads Cedar3 0.99 (5,1) 0.81 (5,2)
Cedar4 0.95 (5,1) 0.57 (5,2)
Cedar5 1.05 (5,1) 0.51 (5,2)
Top Wood screw Iron round bar insertion Cedar3 1.37 (6,1) − (6,2)
Cedar4 0.72 (6,1) − (6,2)
Cedar5 1.26 (6,1) − (6,2)
Top Wood screw Loose attachment to the post Cedar3 1.07 (7,1) 0.94 (7,2)
Cedar4 1.07 (7,1) 0.63 (7,2)
Cedar5 0.96 (7,1) 0.53 (7,2)
Top Wood screw Tight attachment to the post Cedar3 0.56 (8,1) 0.87 (8,2)
Cedar4 0.55 (8,1) 0.74 (8,2)
Cedar5 0.77 (8,1) 0.59 (8,2)
Side Wood screw Hanging with two threads Cedar3 0.84 (9,1) 1.03 (9,2)
Cedar4 0.69 (9,1) 0.87 (9,2)
Cedar5 − 0.55 (9,1) 0.97 (9,2)
Side Wood screw Iron round bar insertion Cedar3 0.96 (10,1) − (10,2)
Cedar4 0.55 (10,1) − (10,2)
Cedar5 − 0.52 (10,1) − (10,2)
Side Wood screw Loose attachment to the post Cedar3 0.79 (11,1) 0.97 (11,2)
Cedar4 0.54 (11,1) 0.80 (11,2)
Cedar5 − 0.53 (11,1) 1.24 (11,2)
Side Wood screw Tight attachment to the post Cedar3 0.41 (12,1) 0.95 (12,2)
Cedar4 0.30 (12,1) 1.19 (12,2)
Cedar5 − 0.48 (12,1) 1.46 (12,2)
  1. The estimation accuracy of the vibration method with additional mass are expressed by the ratio of the weight calculated by the vibration method with additional mass to that measured by a platform scale. Testing conditions are shown in parentheses