The present disclosure relates to a hollow board 1 with first and second main surface layers 3, 5. A plurality of distance elements connecting the first and second main surface layers and maintain a predetermined distance there between. The main surface layers include at least a layer of high-density fiber, HDF, board, and a plurality of distance elements are distributed in the space between the main surface layers, and at least some comprise at least one elongate HDF board strip 15 which is oriented such that its longitudinal edges interconnect the first and second main surface layers 3, 5. The HDF boards of the surface layers and of the at least some of the distance elements comprise wood particles bonded by a resin including an isocyanate, such as methylene diphenyl di-isocyanate, MDI.

A panel assembly can include a first panel having a peripheral side located between an upper and a lower surface of the first panel and a first opening. The panel assembly can also include a second panel having a second opening. An elongated insert can be coupled to the first panel, the elongated insert having a coupling side, where the first opening of the first panel can be sized and shaped to coupleably receive the elongated insert such that the coupling side is positioned proximal to the peripheral side. The panel assembly can also include a fastening insert, where the second opening of the second panel can be sized and shaped to receive the fastening insert. A fastener can be received by the fastening insert and the elongated insert, the fastener coupling the first panel to the second panel via the fastening insert and the elongated insert. Related methods for assembling the panel assembly are also provided.

Building or structural panels may be joined, such as to form walls or floors. The panels may be connected in various orientations via one or more connectors. The connectors may mount to anchors associated with the panels. The panels may have outer skins located over an expanded core comprising a matrix of supporting elongate members and voids or openings, with the anchors located at edges of the panels.

Building or structural panels may be joined, such as to form walls or floors. The panels may be connected in various orientations via one or more connectors. The connectors may mount to anchors associated with the panels. The panels may have outer skins located over an expanded core comprising a matrix of supporting elongate members and voids or openings, with the anchors located at edges of the panels.

The present disclosure generally relates to thermoplastic truss structures and methods of forming the same. The truss structures are formed using thermoplastic materials, such as fiber reinforced thermoplastic resins, and facilitate directional load support based on the shape of the truss structure. In one example, multiple two-dimensional patterns of fiber reinforced thermoplastic resin are disposed on one another in a saw tooth pattern, sinusoidal pattern, or other repeating pattern, and adhered to one another in selective locations. The two dimensional patterns may then be expanded in a third dimension to form a three-dimensional, cross-linked truss structure. The three-dimensional, cross-linked truss structure may then be heated or otherwise treated to maintain the three-dimensional shape.

The present disclosure generally relates to thermoplastic truss structures and methods of forming the same. The truss structures are formed using thermoplastic materials, such as fiber reinforced thermoplastic resins, and facilitate directional load support based on the shape of the truss structure. In one example, multiple two-dimensional patterns of fiber reinforced thermoplastic resin are disposed on one another in a saw tooth pattern, sinusoidal pattern, or other repeating pattern, and adhered to one another in selective locations. The two dimensional patterns may then be expanded in a third dimension to form a three-dimensional, cross-linked truss structure. The three-dimensional, cross-linked truss structure may then be heated or otherwise treated to maintain the three-dimensional shape.

A method of constructing a building comprising the steps of attaching a first panel to a second panel. The first panel is one of a single plenum panel and a multi-plenum panel and the second panel is one of a single plenum panel and a multi-plenum panel.

An example method for manufacturing a multicellular structure for acoustic damping is described that includes applying a porogen material to a solid support, inserting a multicellular frame into the solid support and through the porogen material so as to fill cells of the multicellular frame with the porogen material, fusing the porogen material, removing the multicellular frame from the solid support, and the multicellular frame contains a suspended fused porogen network attached to walls of the cells of the multicellular frame. The method also includes applying a solution to the suspended fused porogen network in the cells of the multicellular frame to percolate the suspended fused porogen network, curing the solution, and removing the suspended fused porogen network from the multicellular frame resulting in porous septum membranes of the cured solution in cells of the multicellular frame.

A one-piece component comprising a tetrahedral-octahedral honeycomb lattice is disclosed herein, along with a mold, a system and methods of making the component. A one-piece component comprising a truncated tetrahedral-octahedral honeycomb lattice also is disclosed, along with corresponding molds, systems and methods.

A panel assembly can include a first panel having a peripheral side located between an upper and a lower surface of the first panel and a first opening. The panel assembly can also include a second panel having a second opening. An elongated insert can be coupled to the first panel, the elongated insert having a coupling side, where the first opening of the first panel can be sized and shaped to coupleably receive the elongated insert such that the coupling side is positioned proximal to the peripheral side. The panel assembly can also include a fastening insert, where the second opening of the second panel can be sized and shaped to receive the fastening insert. A fastener can be received by the fastening insert and the elongated insert, the fastener coupling the first panel to the second panel via the fastening insert and the elongated insert. Related methods for assembling the panel assembly are also provided.