A data center cabinet has a base frame and a top cap attached to the base frame. The top cap has a main panel having a front edge, rear edge, first side edge, a second side edge, top surface, and bottom surface. An opening is formed through the main panel and is inset and spaced apart from the front, rear, first side, and second side edges. A removable door is positioned over the opening and is hinged to the main panel such that the door can rotate between an open position and a closed position and be removed from the main panel.

A dock door assembly and a dock door assembly kit are provided for use in a dock door opening for installation in a warehouse. The dock door assembly comprises a pair of vertical tracks, with each vertical track configured to be attached to a wall along opposing lateral sides of the dock door opening. The dock door assembly also comprises a multiple, horizontal section door characterized by a vertical height when closed and mounted on the pair of vertical tracks. The dock door assembly further comprises a spring shaft assembly and a pair of headplates with each headplate having a U-shaped opening to receive each end of a torsion shaft. Further, the dock door assembly may comprise a pair of door cables and a pair of corner cable attachments connecting each door cable to the spring shaft assembly.

A dock door assembly and a dock door assembly kit are provided for use in a dock door opening for installation in a warehouse. The dock door assembly comprises a pair of vertical tracks, with each vertical track configured to be attached to a wall along opposing lateral sides of the dock door opening. The dock door assembly also comprises a multiple, horizontal section door characterized by a vertical height when closed and mounted on the pair of vertical tracks. The dock door assembly further comprises a spring shaft assembly and a pair of headplates with each headplate having a U-shaped opening to receive each end of a torsion shaft. Further, the dock door assembly may comprise a pair of door cables and a pair of corner cable attachments connecting each door cable to the spring shaft assembly.

An improvement for use with a door latch assembly for a roll-up door includes a shim dimensioned and shaped to be positioned over a latch cover of the latch door assembly and to be slidingly moved to a shim extended position wherein a shim tang extends beyond a latch slide tang of the latch assembly. The shim is configured so that, if the latch assembly is mounted to a rolling door and is locked into an unsecured position by a first lock, wherein the slide tang does not engage the door jamb, the shim can be moved to and locked in the shim extended position to secure the rolling door without removing the first lock.

An improvement for use with a door latch assembly for a roll-up door includes a shim dimensioned and shaped to be positioned over a latch cover of the latch door assembly and to be slidingly moved to a shim extended position wherein a shim tang extends beyond a latch slide tang of the latch assembly. The shim is configured so that, if the latch assembly is mounted to a rolling door and is locked into an unsecured position by a first lock, wherein the slide tang does not engage the door jamb, the shim can be moved to and locked in the shim extended position to secure the rolling door without removing the first lock.

The present lift lock includes a slide having feet and a slot between the feet, where such slide further includes an interior generally full length wall for acting as a stop, and where such slide further includes gripping ribs that increase in width from the front end of the slide to the rear end of the slide.

The present lift lock includes a slide having feet and a slot between the feet, where such slide further includes an interior generally full length wall for acting as a stop, and where such slide further includes gripping ribs that increase in width from the front end of the slide to the rear end of the slide.

A data center cabinet has a base frame and a top cap attached to the base frame. The top cap has a main panel having a front edge, rear edge, first side edge, a second side edge, top surface, and bottom surface. An opening is formed through the main panel and is inset and spaced apart from the front, rear, first side, and second side edges. A removable door is positioned over the opening and is hinged to the main panel such that the door can rotate between an open position and a closed position and be removed from the main panel.

A data center cabinet has a base frame and a top cap attached to the base frame. The top cap has a main panel having a front edge, rear edge, first side edge, a second side edge, top surface, and bottom surface. An opening is formed through the main panel and is inset and spaced apart from the front, rear, first side, and second side edges. A removable door is positioned over the opening and is hinged to the main panel such that the door can rotate between an open position and a closed position and be removed from the main panel.

An overhead door interlock device provides an electrical signal indication of the locked or unlocked status of an overhead door, and interfaces with control circuitry of the door's opener to allow or disallow operation of the door based on the locked or unlocked status. In one embodiment, a lever is pivotably attached to the doors track, with the lever engaging with a switch mechanism to indicate the locked or unlocked status of the door. A spring mechanism automatically returns the lever to an unlocked position when the door's lock bar is retracted, with the lever mechanically inhibiting locking of the door until the lever is moved by a user.