A connector includes at least two cavities or receptacles extending from a base to receive adjacent tubes of a wall or panel. The receptacles are closed at one end. At least two walls extend from the base in the same direction as the receptacles. The walls are positioned on the base and outside the receptacles such that the panels are secured to a specific angular orientation with respect to each other. A top connector and a bottom connector are used to secure rods or tubes of adjacent panels. A series of top and bottom connectors can be used to secure multiple panels to form an enclosure, such as a kennel or gazebo.

A mount for a shade structure, in particular a collapsible pavilion. The mount has a base and a cover. The base has a space formed therein configured to receive a ground support of a shade structure. The cover has a top surface and a bottom surface to be secured to the base. A groove is formed in the mount and is configured to pivotably receive a rib. The groove is disposed between opposed walls of the mount. A pin retention recess is disposed on each side of the opposed walls in one of the cover and the base. A plurality of projections are provided that each have a first end fixed to one of the cover and the base in which the pin retention recess is not formed and a second end disposed away from the fixed end. One of the projections is configured to enclose a portion of the retention recess when the cover and the base are secured together.

A connector includes at least two cavities or receptacles extending from a base to receive adjacent tubes of a wall or panel. The receptacles are closed at one end. At least two walls extend from the base in the same direction as the receptacles. The walls are positioned on the base and outside the receptacles such that the panels are secured to a specific angular orientation with respect to each other. A top connector and a bottom connector are used to secure rods or tubes of adjacent panels. A series of top and bottom connectors can be used to secure multiple panels to form an enclosure, such as a kennel or gazebo.

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.

A universal joint system is provided for joining tubular members to form two-dimensional or three-dimensional shapes or structures. The system includes a plurality of cubic elements, a plurality of adaptor elements, a plurality of connection elements, and a plurality of insertion elements. Structures or shapes built with the system can have a smooth and continuous appearance. In addition, the construction of varies structures or shapes requires only few kinds of elements and no special tool or training is needed.

A connector is described herein. In an embodiment, a connector may comprises an upper wall, a lower wall, one or more outer circular walls and one or more inner circular walls; wherein one of the one or more outer circular walls is an extended part of the upper wall or the lower wall; wherein one of the one or more outer circular walls and one of the one or more inner circular walls are configured to form a circular slot between the outer circular wall and the inner circular wall; wherein the connector is configured to accommodate a plurality of ends of a plurality of planar panels in the circular slot to connect the plurality of planar panels. The connect further comprises a top connector piece and a bottom connector piece; wherein the top connector piece comprises the upper wall and one of the one or more inner circular walls; wherein the bottom connector piece comprises the lower wall and one of the one or more inner circular walls; wherein the top connector piece and the bottom connector piece are configured to be joined. In an embodiment, the connector is configured to facilitate the assembly of a dome structure.