| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a staircase equipped with vibration control devices which exerts a higher vibration control effect than ever. <P>SOLUTION: The vibration control device 36 which is a mass damper, is mounted in a side surface of each of a lower staircase beam 28 and an upper staircase beam 34 constituting girders of the staircase 10, via a bracket 38. Thus vibration of the girders caused by step walking is effectively absorbed by the vibration control devices 36. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
