| 摘要 |
A construction beam (100) includes a pair of lateral members (102, 104) and a resilient web (106) extending therebetween, so as to present a cross-sectional profile corresponding to commonly used construction beam members (for example, 2" x 4" or 2" x 6" (5.08 cm x 10.16 cm or 5.08 cm x 15.24)). The resilience of the web helps to attenuate sound transmission through the beam from one lateral member to the other. In particular, in a wall frame, the lateral members are mounted at opposite ends thereof to end plates consisting of other construction beams according to the present invention (that is, a pair of lateral members with a resilient web extending therebetween). When the wall frame is used in a building structure, the lateral members of the end plates on the same side are attached to the surrounding structure, leaving the other side of the frame resiliently free floating. A wall is mounted on the free floating side of the wall frame so as to provide a resiliently free floating wall that acts as a sound attenuating "diaphragmatic" absorber. The web is preferably (but not necessarily) provided with spacers (410) formed thereon, so that the lateral members can be easily oriented relative to the web and to each other, so as to be self-jigging. The spacers may conveniently be formed by cutting and bending tabs in the material of the web in desired locations. |
