A core layer suitable for a multilayer composite including at least one surface layer and one core layer, the surface layer arranged to at least partially cover the core layer and be fixedly connected thereto, wherein the core layer has elements composed of wood, which elements have plate-like regions arranged in zig-zag-shaped fashion, wherein a plate-like zig region of an element with an adjoining plate-like zag region of the element form a common edge between them, in such a way that the wood element of zig-zag-shaped form is formed, wherein elements of zig-zag-shaped form are arranged in the core layer such that two such edges of two different elements cross one another at a non-zero angle, and wherein the two elements are fixedly connected to one another at the crossing point. In one embodiment, a wood element of zig-zag-shaped form may be adhesively bonded to a planar wood element.

The invention relates to plate that comprises an upper strip (1), a lower strip (2), both of which are flat, and a multidirectionally folded, curved or undulate intermediate structure (3) arranged between the upper strip (1) and the lower strip (2), and which is joined to the upper (1) and lower (2) strips at contact zones or connection points (4) and (5), intermittently located and distributed, such that it defines at least two chambers, channels or hollow spaces, interstitial (6) and (7) and continuous, which extend throughout the plate in at least two different directions. This way, a lightweight plate is obtained that is structurally, acoustically and thermally resistant, easy to systematically manufacture or mount and can be efficiently used as an integral system for constructing slabs and similar, since the inner holes can also be used as integrated accessible channels for installations.

A structural panel includes a core and first and second facing sheets. The core has bonding surfaces on first and second, opposite sides thereof. The first facing sheet is a non-thermoplastic, fire retardant facing sheet having an inner surface bonded to the bonding surface on the first side. The second facing sheet is bonded to the bonding surface on the second side. The first facing sheet is fire retardant or non-flammable and the core is at least fire retardant. The structural panel finds particular utility as a building-cladding panel.

A composite structural panel for use in bridge structures, and method of manufacturing same, comprises a top panel and a bottom panel separated by and attached to at least one, but preferably a plurality, of structural composite preforms which may be fabricated by a continuous manufacturing process and may be saturated by resin using a continuous wetting process. The composite preforms may take any cross sectional shape but are preferably trapezoidal. The top and bottom panels may be fabricated from a plurality of layers of woven fabric layers and non-woven fabric layers which are saturated with a resin that is subsequently cured using cure processes known in the art. The composite structural panel of the invention is usable as a flat structural member for use as bridge decking, ramps, trestles, and any application requiring a structural panel.

A composite structural panel for use in bridge structures, and method of manufacturing same, comprises a top panel and a bottom panel separated by and attached to at least one, but preferably a plurality, of structural composite preforms which may be fabricated by a continuous manufacturing process and may be saturated by resin using a continuous wetting process. The composite preforms may take any cross sectional shape but are preferably trapezoidal. The top and bottom panels may be fabricated from a plurality of layers of woven fabric layers and non-woven fabric layers which are saturated with a resin that is subsequently cured using cure processes known in the art. The composite structural panel of the invention is usable as a flat structural member for use as bridge decking, ramps, trestles, and any application requiring a structural panel.

This shaping structure (1) comprises two shaping sheets (5, 7) facing each other at a distance from one another. According to the invention, the shaping structure (1) further comprises a macroporous spacer sheet (9), the spacer sheet (9) being arranged between the two shaping sheets (5, 7) and being corrugated in such a way as to form a series of alternating even peaks (18) and odd peaks (20) distributed in a first direction (D1) of the shaping structure, at least one of the even peaks (18) being attached to the first shaping sheet (5), at least one of the odd peaks (20) being attached to the second shaping sheet (7), each peak (18, 20) attached in this way defining an attachment surface (22, 26) for attachment to the shaping sheet (5, 7) to which this peak (18, 20) is attached.

A wall panel is provided that can be prefabricated and pre-assembled, and can be easily and quickly installed in the field. The wall panel includes an exterior infill component, an interior structural component, and a frame. The frame includes a first jamb member, a second jamb member, a head member, and a sill member. A wall system is provided comprising a plurality of wall panels. A method of installing the wall panel system and a method of assembling the wall panel are also provided.

A honeycomb sandwich sheet or panel, based on thermoplastic polypropylene, includes a structure having two flat outer films, thermowelded to a central film that includes a thermoformed blister film, with blisters repeated in a regular and continuous pattern, the flat outer films including a coextruded two-layer film, based on thermoplastic polypropylene, wherein the inner layer faces the central thermoformed film, and the central thermoformed blister film includes a coextruded three-layer film, based on thermoplastic polypropylene, wherein the two outer layers face the flat outer films, and wherein the structure includes and additional layer C thermowelded to the outer layer of the two flat outer films.

A structural flooring panel comprises an upper sheet, a lower sheet and a plurality of longitudinally extending ribs between the sheets. The ribs are laterally spaced to define at least one longitudinally extending, internal channel within the panel.

A demountable structure system is disclosed. The demountable structure system may have a roof system positioned atop one or more structural panel(s) and a floor system positioned beneath one or more structural panels(s). The structural panels may have different shapes, configurations, and features, and may support the roof system in order to form a demountable structure. Alternatively, the roof system is omitted and a wall or other structure can be formed from the structural panels. Each structural panel may have other features, such as finish panels, fabric panels, accessory mounts, recessed lighting, electrical outlets, etc. Some structural panels have sound dampening features, such as to form portable musician's sound booth. Thus, a structure may be formed which is both readily disassembled, yet also sturdy.