A boat or recreational vehicle ladder apparatus is provided. One aspect of the present ladder apparatus includes an elongated extension handle including a slot adjacent a lower end thereof. Another aspect of a boat or recreational vehicle ladder apparatus provides a snap-on step tread which can be mounted to a dual-tubular ladder step structure. Another aspect of a boat or recreational vehicle ladder apparatus employs a laterally expandable ladder step which can be retrofit onto an existing ladder. A further aspect employs clasps or hooks to attach and retain a ladder step to generally vertical ladder rails in a tool-free and fastener-free manner.

A boat or recreational vehicle ladder apparatus is provided. One aspect of the present ladder apparatus includes an elongated extension handle including a slot adjacent a lower end thereof. Another aspect of a boat or recreational vehicle ladder apparatus provides a snap-on step tread which can be mounted to a dual-tubular ladder step structure. Another aspect of a boat or recreational vehicle ladder apparatus employs a laterally expandable ladder step which can be retrofit onto an existing ladder. A further aspect employs clasps or hooks to attach and retain a ladder step to generally vertical ladder rails in a tool-free and fastener-free manner.

A closure cover and an extension ladder are provided. The closure cover includes an upper closure plate, a lower closure plate, and two airtight sheets, the upper closure plate and the lower closure plate are fixedly connected by a connector, the upper closure plate and the lower closure plate are each provided with ventilation holes, the airtight sheets are fixed to a surface of the upper closure plate facing away from the lower closure plate and a surface of the lower closure plate facing away from the upper closure plate, respectively, and the airtight sheets are capable of controlling the closing and opening of the ventilation holes.

A closure cover and an extension ladder are provided. The closure cover includes an upper closure plate, a lower closure plate, and two airtight sheets, the upper closure plate and the lower closure plate are fixedly connected by a connector, the upper closure plate and the lower closure plate are each provided with ventilation holes, the airtight sheets are fixed to a surface of the upper closure plate facing away from the lower closure plate and a surface of the lower closure plate facing away from the upper closure plate, respectively, and the airtight sheets are capable of controlling the closing and opening of the ventilation holes.

An interlocking ladder system for transporting at least two ladders which are stacked together. The ladder system includes a first ladder having a first end cap having a cap portion and an engagement portion with a slot, a second ladder having a second end cap having a cap portion and an engagement portion with a slot, and preferably a third end cap having a cap portion and an engagement portion with a slot. The slot of the engagement portion of the second end cap engages with the slot of the engagement portion of the first end cap when the second ladder is stacked on top of the first ladder. The ladder system may include a third ladder having a fourth end cap having a cap portion and an engagement portion and a slot. The slot of the engagement portion of the third end cap engages with the slot of the engagement portion of the fourth end cap when the third ladder is stacked on top of the second ladder. The second ladder stacked on top of the first ladder and preferably the third ladder stacked on top of the second ladder all together form a stack. A method for stacking ladders into a stack.

An interlocking ladder system for transporting at least two ladders which are stacked together. The ladder system includes a first ladder having a first end cap having a cap portion and an engagement portion with a slot, a second ladder having a second end cap having a cap portion and an engagement portion with a slot, and preferably a third end cap having a cap portion and an engagement portion with a slot. The slot of the engagement portion of the second end cap engages with the slot of the engagement portion of the first end cap when the second ladder is stacked on top of the first ladder. The ladder system may include a third ladder having a fourth end cap having a cap portion and an engagement portion and a slot. The slot of the engagement portion of the third end cap engages with the slot of the engagement portion of the fourth end cap when the third ladder is stacked on top of the second ladder. The second ladder stacked on top of the first ladder and preferably the third ladder stacked on top of the second ladder all together form a stack. A method for stacking ladders into a stack.

A stowable step assembly for climbing a structure is disclosed which includes an articulating step, including a step, the step has at least one cam surface, allowing articulation of the step from i) a deployed position allowing a user to place weight on the step, to ii) a stowed position, at least one cam stop configured to stop the cam motion of the step when in the deployed position; a hanger, including a connector configured to interface with the step, wherein the connector includes at least one counterpart cam surface to the at least one cam surface of the step and wherein the connector includes at least one counterpart cam stop to the at least one cam stop of the step, at least one hook configured to interface with a counterpart attachment arrangement of a structure; and a fastener configured to couple the connector to the step.

A stowable step assembly for climbing a structure is disclosed which includes an articulating step, including a step, the step has at least one cam surface, allowing articulation of the step from i) a deployed position allowing a user to place weight on the step, to ii) a stowed position, at least one cam stop configured to stop the cam motion of the step when in the deployed position; a hanger, including a connector configured to interface with the step, wherein the connector includes at least one counterpart cam surface to the at least one cam surface of the step and wherein the connector includes at least one counterpart cam stop to the at least one cam stop of the step, at least one hook configured to interface with a counterpart attachment arrangement of a structure; and a fastener configured to couple the connector to the step.

Ladder components, such as braces, as well as ladders and methods of manufacturing ladders are provided. In one embodiment, a ladder brace is provided which extends between a rail and a cross member (e.g., a rung or a cross-brace). The ladder brace may include a first connecting portion associated with the rail, a second connecting portion associated with the cross member, and a strut portion extending between the first and second connecting portions. At least one of the first connecting portion and the second connecting portion is configured to completely encircle its associated component (e.g., either the rail or the cross member, respectively).

Ladder components, such as braces, as well as ladders and methods of manufacturing ladders are provided. In one embodiment, a ladder brace is provided which extends between a rail and a cross member (e.g., a rung or a cross-brace). The ladder brace may include a first connecting portion associated with the rail, a second connecting portion associated with the cross member, and a strut portion extending between the first and second connecting portions. At least one of the first connecting portion and the second connecting portion is configured to completely encircle its associated component (e.g., either the rail or the cross member, respectively).