A concrete system comprising a concrete threaded rod and a concrete part having a threaded aperture for receiving the concrete threaded rod.

A device for compensating for the natural shrinkage of building materials includes a hinged expander mounted on an elongate base plate. The base plate includes a plurality of spaced apart teeth on each longitudinal end that define a notch between each pair of adjacent spaced teeth. The hinged expander included two leafs that are joined at an apex in a hinged relationship. Each leaf has an outer edge configured for receipt within a notch in the base plate. Apex is biased in a direction away from the base plate. The teeth prevent outward movement of the leaf edges while permitting inward movement. The base plate is securely fastened to a first building member. A fastener is longitudinally fixed relative to a second building member and the apex of the hinged expander but not fixed longitudinally relative to the base plate and first building member.

A combination type shielding structure includes a top assembly member, a bottom assembly member, and a wall assembly member. The top assembly member is provided on the bottom thereof with a first connector. The wall assembly member is provided on the top thereof with a second connector. The first connector is detachably connected with the second connector. The wall assembly member is provided on the bottom thereof with a third connector. The bottom assembly member is provided on the top thereof with a fourth connector. The third connector is detachably connected with the fourth connector.

A clamp may include two substantially planar plates opposite from and generally parallel to one another, each plate having a mounting hole formed therein for receiving a fastener, two teeth, each tooth extending from a respective one of the two plates, such that each tooth is generally perpendicular to the plates, and such that each tooth extends towards the other from its respective plate, and a tongue opposite from and mechanically interfaced between the two plates, such that the tongue has a concave curved profile between the plates, and such that when a force is applied in a first direction by a fastener engaging with the clamp through the mounting holes, compression of the plates towards one another causes deflection of the tongue in a second direction substantially perpendicular to the first direction.

The invention relates to a construction chamber (1) for an apparatus for additive manufacturing of three-dimensional objects, comprising a construction chamber base body (2) which limits a construction volume (4) forming a construction room (3), wherein the construction chamber base body (2) is formed segmented in several construction chamber base body segments (2a, 2b) that can be attached or are attached to each other forming the construction chamber base body (2).

Provided is a storage receptacle stacking system comprising a set of receptacles. Each receptacle is an open rectangular prism defined by, a back panel, which has a top edge, a bottom edge, a right edge, and a left edge, and a first back panel surface, and a set of side panels. The set of side panels has top, bottom, left, and right panels. Each receptacle is removably engaged to at least one other receptacle by a first set of fasteners. For each receptacle, at least one of the panels in the set of side panels is adjacent to and parallel with at least one of the panels in the set of side panels of another receptacle, and any one of the panels in the set of side panels may be engaged in the alternative with any one of the panels in the set of side panels of any other receptacle.

A combination type shielding structure includes a top assembly member, a bottom assembly member, and a wall assembly member. The top assembly member is provided on the bottom thereof with a first connector. The wall assembly member is provided on the top thereof with a second connector. The first connector is detachably connected with the second connector. The wall assembly member is provided on the bottom thereof with a third connector. The bottom assembly member is provided on the top thereof with a fourth connector. The third connector is detachably connected with the fourth connector.

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.

An adjustable fastening system includes a first member and a second member. The first member includes a plurality of fingers radially positioned about a central longitudinal axis, and a plurality of notches, with one of the notches disposed between an adjacent pair of the fingers. The second member is attached to the first member, and moves axially along the central longitudinal axis, relative to the first member, in response to rotational movement about the central longitudinal axis. The second member includes a plate having a protuberance extending radially outward from the central longitudinal axis. The protuberance is positioned within one of the plurality of notches, and in interlocking engagement with two of the plurality of fingers, to resist rotation of the second member relative to the first member about the central longitudinal axis.

Provided is a storage receptacle stacking system comprising a set of receptacles. Each receptacle is an open rectangular prism defined by, a back panel, which has a top edge, a bottom edge, a right edge, and a left edge, and a first back panel surface, and a set of side panels. The set of side panels has top, bottom, left, and right panels. Each receptacle is removably engaged to at least one other receptacle by a first set of fasteners. For each receptacle, at least one of the panels in the set of side panels is adjacent to and parallel with at least one of the panels in the set of side panels of another receptacle, and any one of the panels in the set of side panels may be engaged in the alternative with any one of the panels in the set of side panels of any other receptacle.