A construction beam includes a pair of lateral members and a resilient web extending therebetween, so as to present a cross-sectional profile corresponding to commonly used construction beam members. The resilience of the web helps to attenuate sound transmission through the beam from one lateral member to the other. Ends of the resilient web are fixed to respective ones of the lateral members on opposite sides of an imaginary reference plane passing orthogonally through both of the lateral members. 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. When used in a frame of 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.