A protection device (5a) for motorcyclists, adapted to be secured to a road safety barrier (1) with a plurality of poles (3) regularly spaced out, the protection device (5a) including a longitudinal beam (6a) and a spacer (7a) extending longitudinally alongside the rear side of at least one part of the beam (6a) and adapted to be secured to the poles, wherein the beam (6a) and the spacer (7a) are assembled together so as to define, in the part of the beam, a longitudinal damping volume (V) with a closed cross-section.

Described herein is an acoustic structural panel having a first exposed major surface opposite a second exposed major surface and side surfaces extending between the first and second exposed major surfaces, the acoustic structural panel comprising a first protective layer comprising at least a portion of the first exposed major surface, a second protective layer comprising at least a portion of the second exposed surface, a core structure located between the first and second protective layers, the core structure comprising, a foam body; and a fibrous body, wherein the first major exposed surface of the acoustic structural panel comprises a plurality of apertures exposing the fibrous body.

Described herein is an acoustic structural panel having a first exposed major surface opposite a second exposed major surface and side surfaces extending between the first and second exposed major surfaces, the acoustic structural panel comprising a first protective layer comprising at least a portion of the first exposed major surface, a second protective layer comprising at least a portion of the second exposed surface, a core structure located between the first and second protective layers, the core structure comprising, a foam body; and a fibrous body, wherein the first major exposed surface of the acoustic structural panel comprises a plurality of apertures exposing the fibrous body.

Systems and methods are disclosed for a highway sound wall system comprising a sound wall panel assembly filled with loose foam glass aggregates. The highway sound wall may further comprise a pair of spaced apart vertical members. The vertical members may be H-beams having a flange portion and a body portion. The highway sound wall may further comprise a pair of spaced apart mesh members extending between and retained within the vertical members, thereby forming the sound wall panel assembly. Each of the vertical members may have at least one stop block attached to the flange portion and at least one stop block attached to the body portion. At least one vertical edge of the mesh members may have an attached bar which engages both stop blocks. The sound wall may be temporary or permanent.

A sound absorbing guard rail system for installation at a lateral or median side of a road, the guard rail system having a series of supporting posts, that are preferably vertically oriented, at least one noise absorbing panel that can be mounted to the supporting posts, and a series of longitudinal guard rails mounted on the side of the guard rail system facing the road. The noise absorbing panel comprise a noise absorbing material which is encased in an energy absorbing material provided with openings.

A barrier wall has a first vertical support and a second vertical support. A first wall panel is disposed between the first vertical support and second vertical support. A second wall panel is disposed between the first vertical support and second vertical support over the first wall panel. An I-beam is disposed between the first wall panel and second wall panel. The I-beam includes a first flange and second flange extending into the first wall panel and second wall panel. A cable is disposed between the first wall panel and second wall panel. The I-beam includes a ridge around the cable. A grounding cable is attached to the I-beam. The first wall panel includes a first channel extending for a length of the first wall panel. A first sound absorbing material strip is disposed in the first channel. A traffic barrier is disposed under the first wall panel.

A barrier wall has a first vertical support and a second vertical support. A first wall panel is disposed between the first vertical support and second vertical support. A second wall panel is disposed between the first vertical support and second vertical support over the first wall panel. An I-beam is disposed between the first wall panel and second wall panel. The I-beam includes a first flange and second flange extending into the first wall panel and second wall panel. A cable is disposed between the first wall panel and second wall panel and attached to the first vertical support.

A noise absorbing panel for use in a sound absorbing guard rail structure having a series of supporting posts, that are preferably vertically oriented, and a series of longitudinal guard rail beams mounted on the side of the guard rail structure facing the road, wherein the noise absorbing panel is mountable to the two adjacently situated supporting posts.

The invention relates to a work surface arrangement consisting at least of a standing work surface, a seated work surface, at least one planning board and a movement space having a center as basic elements; said basic elements are arranged at a random angle relative to each other around the movement space and are each arranged at a distance a.sub.1, . . . , a.sub.n around an imaginary center, said distance lying within a radius ranging from about 0.30 m to 2.00 m, measured from a front edge of the basic element to the imaginary center.

A barrier wall has a first vertical support and a second vertical support. A first wall panel is disposed between the first vertical support and second vertical support. A second wall panel is disposed between the first vertical support and second vertical support over the first wall panel. An I-beam is disposed between the first wall panel and second wall panel. The I-beam includes a first flange and second flange extending into the first wall panel and second wall panel. A cable is disposed between the first wall panel and second wall panel. The I-beam includes a ridge around the cable. A grounding cable is attached to the I-beam. The first wall panel includes a first channel extending for a length of the first wall panel. A first sound absorbing material strip is disposed in the first channel. A traffic barrier is disposed under the first wall panel.