A picking ladder cart with a synchronized brake is provided, which includes a frame, a plurality of wheels, a ladder, and a stopper. The ladder is pivotally connected to a side of the frame, wherein the ladder is pivotally movable between a first position and a second position. The ladder includes two side rails and a plurality of steps, which are connected between the two side rails. The stopper has a first end and, a second end. When the ladder is moved to the second position, one of the plurality of steps, which is arranged at the lowest position among the steps, abuts against the second end of the stopper, which causes the stopper to contact one of the wheels. When an operator steps on the ladder of the picking ladder cart, the lowest step drives the stopper to abut against one of the wheels.

A picking ladder cart with a synchronized brake is provided, which includes a frame, a plurality of wheels, a ladder, and a stopper. The ladder is pivotally connected to a side of the frame, wherein the ladder is pivotally movable between a first position and a second position. The ladder includes two side rails and a plurality of steps, which are connected between the two side rails. The stopper has a first end and, a second end. When the ladder is moved to the second position, one of the plurality of steps, which is arranged at the lowest position among the steps, abuts against the second end of the stopper, which causes the stopper to contact one of the wheels. When an operator steps on the ladder of the picking ladder cart, the lowest step drives the stopper to abut against one of the wheels.

A ladder system includes a ladder, a tray, and a mode-independent attachment unit. The ladder is changeable between a step-ladder mode and a straight-ladder mode. The tray is configured to be attached to any step included in the ladder. The mode-independent attachment unit detachably couples the tray to any step.

A ladder system includes a ladder, a tray, and a mode-independent attachment unit. The ladder is changeable between a step-ladder mode and a straight-ladder mode. The tray is configured to be attached to any step included in the ladder. The mode-independent attachment unit detachably couples the tray to any step.

A dual-purpose folding ladder includes: a base including a plurality of casters provided under the base, a positioning mount provided on the base, and two supporting rods provided on one side of the base; two guide rails each pivotally provided at, and rotatable with respect to, a corresponding one of the two supporting rods, with a connecting plate provided between the two guide rails; a supporting post pivotally connected to the connecting plate at one end and connected to the positioning mount at the other end; two supporting arms each mounted in a corresponding one of the two guide rails, with a plurality of rungs provided between and connecting the two supporting arms; two extension arms each provided at one end of a corresponding one of the supporting arms; and a first pad pivotally provided on the two supporting arms and provided with an arc-shaped positioning plate on one side.

A dual-purpose folding ladder includes: a base including a plurality of casters provided under the base, a positioning mount provided on the base, and two supporting rods provided on one side of the base; two guide rails each pivotally provided at, and rotatable with respect to, a corresponding one of the two supporting rods, with a connecting plate provided between the two guide rails; a supporting post pivotally connected to the connecting plate at one end and connected to the positioning mount at the other end; two supporting arms each mounted in a corresponding one of the two guide rails, with a plurality of rungs provided between and connecting the two supporting arms; two extension arms each provided at one end of a corresponding one of the supporting arms; and a first pad pivotally provided on the two supporting arms and provided with an arc-shaped positioning plate on one side.

A system is provided for safe access to a roof through an opening in a roof of a structure having a fixed ladder leading upward to the opening. The system includes a mechanism to drive a set of pushrods to raise a hatch covering the opening. The system may include a section of ladder secured to the underside of the hatch. The system may have an extendable ladder driven by the drive mechanism to slide along the fixed ladder and extend through the opening in the roof when the hatch is raised. The system may include a safety pole driven by the drive mechanism to extend through the opening in the roof when the hatch is raised. The system allows someone who needs to access the roof for inspection or maintenance to safely open the hatch, climb up through the opening in the roof, and safely step onto the roof.

A system is provided for safe access to a roof through an opening in a roof of a structure having a fixed ladder leading upward to the opening. The system includes a mechanism to drive a set of pushrods to raise a hatch covering the opening. The system may include a section of ladder secured to the underside of the hatch. The system may have an extendable ladder driven by the drive mechanism to slide along the fixed ladder and extend through the opening in the roof when the hatch is raised. The system may include a safety pole driven by the drive mechanism to extend through the opening in the roof when the hatch is raised. The system allows someone who needs to access the roof for inspection or maintenance to safely open the hatch, climb up through the opening in the roof, and safely step onto the roof.

Components for multi-position ladders are provided. A ladder includes an outer ladder section with a first outer rail and a second outer rail, and an inner ladder section with a first inner rail and a second inner rail, the first inner rail extending within the first outer rail and the second inner rail extending within the second outer rail such that the outer ladder section and the inner ladder section are slidable relative to one another to change a position between the inner section and the outer section between a maximum contracted position and a maximum extended position. The ladder further includes a stop positioned on the first outer rail or the first inner rail, the stop positioned to stop relative movement of the inner ladder section and outer ladder section beyond the maximum contracted position. Braces for outer rails of a ladder are further provided.

Components for multi-position ladders are provided. A ladder includes an outer ladder section with a first outer rail and a second outer rail, and an inner ladder section with a first inner rail and a second inner rail, the first inner rail extending within the first outer rail and the second inner rail extending within the second outer rail such that the outer ladder section and the inner ladder section are slidable relative to one another to change a position between the inner section and the outer section between a maximum contracted position and a maximum extended position. The ladder further includes a stop positioned on the first outer rail or the first inner rail, the stop positioned to stop relative movement of the inner ladder section and outer ladder section beyond the maximum contracted position. Braces for outer rails of a ladder are further provided.