The panel system includes lower and upper guides and at least one panel located between and connected to them, to move the panel on the lower guide. The panel system includes a hinge element fixed to the panel and allows the panel to be opened by turning essentially around a rotation axis. The panel system further includes at least two locking housings positioned successively on the upper guide. The locking housings include two opposite locking recesses, defining a circle with radius R3 and between which remains a passage with width P2. The hinge element can travel from one locking housing to another through the passage. The distance between the locking housings is distance P1, configured to be less than two times radius R3. The hinge element may include two locking cams and in addition a guiding edge remaining between them. The panel system locking arrangement includes the hinge element.

A wall panel system including a plurality of wall panels that can be positioned adjacent to each other. Each of the individual wall panels includes an attachment slot that is positioned between upper and lower panel sections. The attachment slot allows external components to be mounted to the wall panel. Each individual wall panel includes a height adjustment mechanism having a support block positioned within an open interior of a bottom cross support rail. The support block receives an adjustment rod that is rotatable to adjust the height of the wall panel. The support block of the height adjustment mechanism includes support flanges that support the weight of the wall panel. The top cross support rail includes an attachment slot that receives a door track for supporting a sliding door. The attachment slot that receives the door track corresponds to the attachment slot positioned between upper and lower panel sections.

A rotatable suspension rail background system with multiple panels is an apparatus that maximizes the amount of background options in a studio area in an indoor or outdoor area for a photoshoot or video shoot. The apparatus includes track system and at least one background assembly. The track system defines a path for each of the plurality of background assemblies and guides each of the at least one background assembly across the studio area. The track system includes an upper main rail, an upper supplementary rail, and an upper raceway. The at least one background assembly provides various visual backgrounds for a photograph or video. More specifically, the apparatus further includes a first background sheet fixed across a first panel face of a support panel of the at least one background assembly. The apparatus further includes a second background sheet fixed across a second panel face of the support panel.

A safety enclosure building system, includes a first wall panel that is rotatably mountable to a first wall, and a second wall panel that is rotatable and slidably mountable to a second wall; such that the wall panels are configured to prevent penetration of a projectile of a firearm; such that the safety enclosure building system is configured to be positioned in a folded-in configuration in a corner between the first wall and the second wall; and such that the safety enclosure building system is configured to be folded out to a folded-out configuration, such that the folded-out configuration can enable students to seek safety in a safe interior behind the safety enclosure building system.

A lavatory includes a partition wall movable along a defined path between a deployed position in which the partition wall divides the lavatory into two discrete areas and a stowed position that defines a combined area in place of the two discrete areas. The partition wall translates along the defined path between the deployed position and the stowed position.