A modular cabinet assembly has at least a first sub-cabinet and a second sub-cabinet. Each sub-cabinet includes a back board having at least two separate back board pieces that are pivotably connected to each other, a left side board pivotably connected to one of the at least two back board pieces, and a right side board pivotably connected to another of the at least two back board pieces. At least one shelf board having opposite ends is removably connected to the left side board and the right side board of either the first sub-cabinet or the second sub-cabinet. A first end board is connected to either an upper end of the first sub-cabinet or a lower end of the second sub-cabinet. A first connector removably connects the left side boards of the first and second sub-cabinets, and a second connector removably connects the right side boards of the first and second sub-cabinets.

A modular cabinet assembly has at least a first sub-cabinet and a second sub-cabinet. Each sub-cabinet includes a back board having at least two separate back board pieces that are pivotably connected to each other, a left side board pivotably connected to one of the at least two back board pieces, and a right side board pivotably connected to another of the at least two back board pieces. At least one shelf board having opposite ends is removably connected to the left side board and the right side board of either the first sub-cabinet or the second sub-cabinet. A first end board is connected to either an upper end of the first sub-cabinet or a lower end of the second sub-cabinet. A first connector removably connects the left side boards of the first and second sub-cabinets, and a second connector removably connects the right side boards of the first and second sub-cabinets.

Tamper-resistant, hole covering systems are provided. An exemplary system may include tamper-resistant coverings on the sides of a hole of an article to cover the hole and a tamper-resistant fastener that passes through the hole and securely connects the two coverings.

Tamper-resistant, hole covering systems are provided. An exemplary system may include tamper-resistant coverings on the sides of a hole of an article to cover the hole and a tamper-resistant fastener that passes through the hole and securely connects the two coverings.

A worktable for a laboratory automation system can include a worktop with a level surface and a support profile for supporting the worktop, bent from a metal sheet The support profile can include a facing edge, and an underside of the worktop can lie directly on the facing edge. The support profile can include at least one reception lug. The worktable can include a bolt-shaped fastener for attaching the worktop on the support profile. The bolt-shaped fastener can project through the worktop and be received in the reception lug.

A worktable for a laboratory automation system can include a worktop with a level surface and a support profile for supporting the worktop, bent from a metal sheet The support profile can include a facing edge, and an underside of the worktop can lie directly on the facing edge. The support profile can include at least one reception lug. The worktable can include a bolt-shaped fastener for attaching the worktop on the support profile. The bolt-shaped fastener can project through the worktop and be received in the reception lug.

A frame for steel furniture and a frame assembly, wherein the frame has a simple structure due to having a press groove and a bent bar formed in a hollow bar, is easily assembled through a connecting part or the like, thus greatly reducing manufacturing, installation, and maintenance costs, and can be expanded as in various embodiments. The frame, which is for steel furniture and formed by a hollow rectangular bar, is characterized in that: the corner of the rectangular bar is press-processed by a jig having a predetermined thickness, thereby forming the press groove in two surfaces contacting the corner; the bent bar having an L-shape forms inside the hollow rectangular bar while the press groove is being formed; and threads for fastening a fastening screw are formed on one surface of the bent bar, wherein the one surface faces the press groove.

A frame for steel furniture and a frame assembly, wherein the frame has a simple structure due to having a press groove and a bent bar formed in a hollow bar, is easily assembled through a connecting part or the like, thus greatly reducing manufacturing, installation, and maintenance costs, and can be expanded as in various embodiments. The frame, which is for steel furniture and formed by a hollow rectangular bar, is characterized in that: the corner of the rectangular bar is press-processed by a jig having a predetermined thickness, thereby forming the press groove in two surfaces contacting the corner; the bent bar having an L-shape forms inside the hollow rectangular bar while the press groove is being formed; and threads for fastening a fastening screw are formed on one surface of the bent bar, wherein the one surface faces the press groove.

A frame corner member includes an elongated hollow extrusion having a central corner portion and two leg portions extending from the central portion. Each leg portion includes an inner side wall spaced from and parallel to an outer side wall, and merging with the central portion. An outer end wall joins the inner and outer side walls, which each include an inner surface facing the inner surface of the other side wall. An opening through the outer end wall defines a space between the inner and outer side walls adjacent one end of the extrusion for receiving one end of one of frame side members and end members. At least one of the inner surfaces in the space has discrete surface features adapted to grip and retain the one end of one of the side members and end members in the space when received through the opening.

A frame corner member includes an elongated hollow extrusion having a central corner portion and two leg portions extending from the central portion. Each leg portion includes an inner side wall spaced from and parallel to an outer side wall, and merging with the central portion. An outer end wall joins the inner and outer side walls, which each include an inner surface facing the inner surface of the other side wall. An opening through the outer end wall defines a space between the inner and outer side walls adjacent one end of the extrusion for receiving one end of one of frame side members and end members. At least one of the inner surfaces in the space has discrete surface features adapted to grip and retain the one end of one of the side members and end members in the space when received through the opening.