The present invention falls within the scope of soundproofing structures for aircrafts, disclosing a double-sided noise barrier suitable for ground run-up enclosures. Therefore, it is proposed a support structure formed by two side surfaces, each side surface having sound insulating plates mounted thereon, providing a 360° soundproofing space around it. By means of the technical advantageous provided with the use of a double-sided noise barrier, the present invention discloses GRE structures which incorporates such barrier, that enable optimization of space in the assembly of a set of individual GREs.

A stiffener member for a hollow elongate panel. The hollow elongate panel may include a first end wall having a groove formation formed by a pair of inner walls and extending a length of the hollow elongate panel. The groove formation may extend into the hollow elongate panel. The stiffener member may include a bight member having opposing ends; a pair of arm members respectively extending from one of the opposing ends of the bight member to provide a substantially U-shaped configuration; and a flange member extending from each of the pair of arm members. The flange member may extend inwardly to abut one of the pair of inner walls of the groove formation when the stiffener member is received within the hollow elongate panel.

A sound wall and a method of constructing the sound wall. The sound wall includes a pair of laterally spaced posts, at least one of the pair of posts including: an elongate central member, a flange extending form the elongate central member in a direction substantially normal to the elongate central member, and a fin extending from the central member. The central member, the flange, and the fin may define a cavity for receiving elongate panels. The sound wall may include a plurality of elongate panels extending between the laterally spaced posts and stacked in an elongate direction of the elongate central member. End regions of the respective elongate panels may be retained between the flange and the fin. The sound wall may include an elongate stiffener member positioned within at least one of the plurality of elongate panels.

A sound wall and a method of constructing the sound wall. The sound wall includes a pair of laterally spaced posts, at least one of the pair of posts including: an elongate central member, a flange extending form the elongate central member in a direction substantially normal to the elongate central member, and a fin extending from the central member. The central member, the flange, and the fin may define a cavity for receiving elongate panels. The sound wall may include a plurality of elongate panels extending between the laterally spaced posts and stacked in an elongate direction of the elongate central member. End regions of the respective elongate panels may be retained between the flange and the fin. The sound wall may include an elongate stiffener member positioned within at least one of the plurality of elongate panels.

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 sound wall and a method of constructing the sound wall. The sound wall includes a pair of laterally spaced posts, at least one of the pair of posts including: an elongate central member, a flange extending form the elongate central member in a direction substantially normal to the elongate central member, and a fin extending from the central member. The central member, the flange, and the fin may define a cavity for receiving elongate panels. The sound wall may include a plurality of elongate panels extending between the laterally spaced posts and stacked in an elongate direction of the elongate central member. End regions of the respective elongate panels may be retained between the flange and the fin. The sound wall may include an elongate stiffener member positioned within at least one of the plurality of elongate panels.

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.

A stiffener member for a hollow elongate panel. The hollow elongate panel may include a first end wall having a groove formation formed by a pair of inner walls and extending a length of the hollow elongate panel. The groove formation may extend into the hollow elongate panel. The stiffener member may include a bight member having opposing ends; a pair of arm members respectively extending from one of the opposing ends of the bight member to provide a substantially U-shaped configuration; and a flange member extending from each of the pair of arm members. The flange member may extend inwardly to abut one of the pair of inner walls of the groove formation when the stiffener member is received within the hollow elongate panel.

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.

A cable road safety fence for installation at a lateral or median side of a road has a series of spaced apart upright posts, and a plurality of tensioned cables provided at different levels on and supported by said posts. At least one noise absorbing panel is mounted onto the cables with at least two mounting points, said points being at different levels.