A blow-molded plastic structure has a hollow interior portion formed during a blow-molding process, and includes first and second outer portions that are spaced apart from each other, with the hollow interior portion disposed there between. The structure includes a pattern of structural stiffening features that are integrally formed in the second outer portion. The pattern of structural stiffening features includes a plurality of tripodal depressions disposed in rows and columns and a plurality of convex regions disposed in rows and columns between the plurality of tripodal depressions. Each convex region has a maximum height between the first and second outer portions. Each of the tripodal depressions extends into the hollow interior portion, includes three indentations disposed adjacent the first outer portion, and includes an island spaced away from the first outer portion. The island has three sides, each of which is disposed adjacent one of the three indentations.

Provided is a chair including a support member that is at least a seat body and a backrest to support an occupant. The support member includes a composite portion at least a part of an outer periphery of the support member. The composite portion includes a first outer periphery that is a part of the first member and a second outer periphery that is a part of the second member. The first outer periphery and the second outer periphery are arranged to overlap each other in a thickness direction of the support member. In the composite portion, at least a part of the first outer periphery is formed into a thin portion thinner in the thickness direction than a part located on an outside of at least the part of the first outer periphery in the first member.

A body support structure includes a structural lattice structure having a first stiffness, and a compressive lattice structure supported by the structural lattice structure and having a second stiffness less than the first stiffness. A skin lattice structure is supported by the compressive lattice structure, wherein the skin lattice structure is resistant to shear deformation in response to a normal force and is expandable in a direction transverse to the normal force.

A body support structure includes a structural lattice structure having a first stiffness, and a compressive lattice structure supported by the structural lattice structure and having a second stiffness less than the first stiffness. A skin lattice structure is supported by the compressive lattice structure, wherein the skin lattice structure is resistant to shear deformation in response to a normal force and is expandable in a direction transverse to the normal force.

An upholstered modular furniture item (1) is described that is formed by a plurality of modular compositions substantially composed of polymeric material. The furniture item is configured such that the modular compositions can be combined with one another by means of at least one fitting element arranged in each one of the modular compositions so that different modular compositions have fitting elements with an interacting structural form for providing the combination of the modular compositions and formation of the modular furniture item (1).

An upholstered modular furniture item (1) is described that is formed by a plurality of modular compositions substantially composed of polymeric material. The furniture item is configured such that the modular compositions can be combined with one another by means of at least one fitting element arranged in each one of the modular compositions so that different modular compositions have fitting elements with an interacting structural form for providing the combination of the modular compositions and formation of the modular furniture item (1).

A chair includes a frame having a plurality of legs, a seat coupled to the frame that includes a seating surface and opposing side edges, and at least one ganging arm. The ganging arm is configured to pivot about a pivot axis into and between an operative position in which the ganging arm extends laterally from one of the opposing side edges and a storage position in which the ganging arm is beneath the seat. In one embodiment, the chair includes a pair of ganging arm, where a first ganging arm includes a male ganging end and the second ganging arm includes a female ganging end. Each of the ganging arms is mounted for rotation about a mounting device attached to the frame of the chair.

A chair includes a frame having a plurality of legs, a seat coupled to the frame that includes a seating surface and opposing side edges, and at least one ganging arm. The ganging arm is configured to pivot about a pivot axis into and between an operative position in which the ganging arm extends laterally from one of the opposing side edges and a storage position in which the ganging arm is beneath the seat. In one embodiment, the chair includes a pair of ganging arm, where a first ganging arm includes a male ganging end and the second ganging arm includes a female ganging end. Each of the ganging arms is mounted for rotation about a mounting device attached to the frame of the chair.

A chair is provided with a seat support frame which may be comprised of at least two tubes spaced apart by a polymer connector. The seat support frame supports a foam cushion and the frame may be embedded in the foam and may include flexible supports across the support frame also embedded in the foam. A rigid panel has a cavity and the rigid panel is arranged adjacent an outer surface of the foam cushion with at least part of the foam cushion positioned within the cavity, wherein the rigid panel is affixed to the support frame and an inner surface of the rigid panel faces the outer surface of the foam cushion.

A body support structure including a plurality of spaced apart support members defining a first surface and a plurality of spaced apart base portions defining a second surface. A plurality of connectors connects each base portion with the at least the two adjacent support members. In one embodiment, a body support structure includes a first plurality of spaced apart first support members and a second plurality of spaced apart second support members arranged in a checkboard pattern.