Skip to main content

Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image

Table 2 Resonance frequency (Hz) measured without the concentrated mass of the actual size round bar

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

Specimen End condition Vertical vibration Horizontal vibration
Cedar3 Hanging with two threads 189.200 185.400
Iron round bar insertion 188.000
Loose attachment to the post 191.650 180.250
Tight attachment to the post 209.840 185.680
Fixed ends 247.833 242.855
Cedar4 Hanging with two threads 192.800 186.200
Iron round bar insertion 195.360
Loose attachment to the post 195.200 180.820
Tight attachment to the post 228.460 186.220
Fixed ends 252.549 243.903
Cedar5 Hanging with two threads 213.000 207.160
Iron round bar insertion 210.480
Loose attachment to the post 213.280 200.580
Tight attachment to the post 230.280 204.660
Fixed ends 279.009 271.359
  1. Resonance frequency under fixed ends condition was estimated based on the measured frequency under free ends condition