A tie bar for connecting two horizontal beams includes first and second elongate walls arranged parallel to each other, and a third elongate wall arranged perpendicular to the first and second elongate walls and coupled to a lateral side of each of the first and second elongate walls. The tie bar further includes at least one pair of hook elements positioned at terminal ends of at least one of the first, second, or third elongate walls. Each of the hook elements includes a depending tab configured to be received by an elongate slot of a horizontal beam of a shelving unit. The first and second elongate walls may be top and bottom walls, respectively, the third elongate wall may be a side wall, and the at least one pair of hook elements may include first and second hook elements positioned on the second elongate wall.

A bracket device includes a sidewall, at least one mounting member, an elastic member, and a fastening member is adjacent to the sidewall. The at least one mounting member is connected to the base. The fastening member is movably mounted on the sidewall, includes an engaging structure, can stay in a first state responsive to the elastic force provided by the elastic member, and can be switched from the first state to a second state by operation. The engaging structure of the fastening member is configured to engage with or be mounted to a target member.

A bracket device includes a sidewall, at least one mounting member, an elastic member, and a fastening member is adjacent to the sidewall. The at least one mounting member is connected to the base. The fastening member is movably mounted on the sidewall, includes an engaging structure, can stay in a first state responsive to the elastic force provided by the elastic member, and can be switched from the first state to a second state by operation. The engaging structure of the fastening member is configured to engage with or be mounted to a target member.

A slide rail mechanism includes a slide rail and a reinforcing structure. The slide rail includes a first section and a second section. The second section is bent relative to the first section. The reinforcing structure is arranged at the slide rail. The reinforcing structure includes a first part and a second part. The second part is bent relative to the first part. Wherein, the first part and the second part are respectively attached to the first section and the second section.

A tie bar for connecting two horizontal beams includes first and second elongate walls arranged parallel to each other, and a third elongate wall arranged perpendicular to the first and second elongate walls and coupled to a lateral side of each of the first and second elongate walls. The tie bar further includes at least one pair of hook elements positioned at terminal ends of at least one of the first, second, or third elongate walls. Each of the hook elements includes a depending tab configured to be received by an elongate slot of a horizontal beam of a shelving unit. The first and second elongate walls may be top and bottom walls, respectively, the third elongate wall may be a side wall, and the at least one pair of hook elements may include first and second hook elements positioned on the second elongate wall.

A wall hanger includes a vertical column including a front wall, a first sidewall having a plurality of first coupling holes, and a second sidewall having a plurality of second sidewalls. A connecting member includes a front board and a sideboard. At least one first coupling member is disposed on the sideboard and is coupled with one of the plurality of first coupling holes. At least one second coupling member extends from a side of the front board. A bracket is disposed in front of the vertical column and includes an arm. The arm includes a rear end having at least one third coupling member selectively engaged with at least one of the plurality of second coupling holes of the second sidewall. The rear end of the arm further includes at least one third coupling hole engaged with the at least one second coupling member.

A wall hanger includes a vertical column including a front wall, a first sidewall having a plurality of first coupling holes, and a second sidewall having a plurality of second sidewalls. A connecting member includes a front board and a sideboard. At least one first coupling member is disposed on the sideboard and is coupled with one of the plurality of first coupling holes. At least one second coupling member extends from a side of the front board. A bracket is disposed in front of the vertical column and includes an arm. The arm includes a rear end having at least one third coupling member selectively engaged with at least one of the plurality of second coupling holes of the second sidewall. The rear end of the arm further includes at least one third coupling hole engaged with the at least one second coupling member.

A slide rail mechanism includes a rail member, a supporting frame and a bracket. The supporting frame is movable relative to the rail member and the bracket. The bracket includes a side wall and at least one mounting member adjacent to the side wall. The at least one mounting member configured to pass through a mounting hole of a post. When the supporting frame is moved relative to the bracket from a first position to a second position, the supporting frame is configured to drive the at least one mounting member to move relative to the side wall.

A bracket device includes a sidewall, at least one mounting member, an elastic member, and a fastening member is adjacent to the sidewall. The at least one mounting member is connected to the base. The fastening member is movably mounted on the sidewall, includes an engaging structure, can stay in a first state responsive to the elastic force provided by the elastic member, and can be switched from the first state to a second state by operation. The engaging structure of the fastening member is configured to engage with or be mounted to a target member.

A bracket device includes a bracket, at least one mounting member, and a hook. The bracket has an end plate. The at least one mounting member is mounted on the end plate of the bracket. The hook is movably connected to the bracket in order to be at either one of a first position and a second position with respect to the bracket. The hook is extended with respect to the end plate of the bracket when at the first position and is retracted with respect to the end plate of the bracket when at the second position.