An elevation-type stair structure comprises: a first stair module, including plural first treads and a first wall surface having a first door and a second door; a second stair module, including plural second treads and a second wall surface having a third door and a fourth door; and an elevator module, enabling the first stair module or the second stair module to be ascended or descended, when the second stair module is ascended for being above a location defined at one side of the first stair module, the second door is aligned with the third door, when the second stair module is descended for being below a location defined at one side of the first stair module, the first door is aligned with the fourth door. Accordingly, a user can walk through the first stair module and the second stair module then return to an original location.

An upper level of a multi-level building is guarded from flooding by water present in one of the levels of the building where the upper level is reached from the lower level (or vice versa) by connecting stairs. A flight of stairs bridging the levels is buoyant and pivotally connected to the building at one end of the flight adjacent one of the levels such that on occasion of water rising originating in one of the levels, the flight rotates upward on the axis of the pivot to block water from entering the upper level.

An upper level of a multi-level building is guarded from flooding by water present in one of the levels of the building where the upper level is reached from the lower level (or vice versa) by connecting stairs. A flight of stairs bridging the levels is buoyant and pivotally connected to the building at one end of the flight adjacent one of the levels such that on occasion of water rising originating in one of the levels, the flight rotates upward on the axis of the pivot to block water from entering the upper level.

The undergrate stairway access assembly is a portable stairway designed to provide safe access to different levels through temporary openings in supporting surfaces such as floors and sidewalks. Specifically, the undergrate stairway access assembly is an assembly comprising an integrated guardrail and step structure that allows a worker to safely traverse between different levels through openings in the supporting surface while preventing workers from inadvertently falling through these openings. The undergrate stairway access assembly is ideal for providing protection for projects that require the removal of grated surface protections such as sidewalk grates, sewage grates or undercarriage bays. The undergrate stairway access assembly comprises one or more step structures and a guardrail structure.

A retractable staircase is disclosed for ascending and descending between a lower elevation and an upper elevation. The retractable staircase comprises a main frame and staircase pivotally coupled to an upper surface. A drive causes a first lifting displacement defining an ascending compound displacement by simultaneously causing an ascending pivot displacement and an ascending slide displacement of the staircase. The drive causes a second lifting displacement defining only the ascending staircase pivot displacement and the ascending frame pivot displacement. The drive maintains the staircase in the upper elevation. The drive causes a first descending displacement defining only a descending staircase pivot displacement. The drive causes a second descending displacement defining a descending compound displacement by simultaneously causing the descending staircase pivot displacement and the descending slide displacement of the staircase. The drive causes an extended length in the tether for positioning the staircase in the lower elevation.

A retractable staircase is disclosed for ascending and descending between a lower elevation and an upper elevation. The retractable staircase comprises a main frame and staircase pivotally coupled to an upper surface. A drive causes a first lifting displacement defining an ascending compound displacement by simultaneously causing an ascending pivot displacement and an ascending slide displacement of the staircase. The drive causes a second lifting displacement defining only the ascending staircase pivot displacement and the ascending frame pivot displacement. The drive maintains the staircase in the upper elevation. The drive causes a first descending displacement defining only a descending staircase pivot displacement. The drive causes a second descending displacement defining a descending compound displacement by simultaneously causing the descending staircase pivot displacement and the descending slide displacement of the staircase. The drive causes an extended length in the tether for positioning the staircase in the lower elevation.

A zipped insulated partition allows entry and exit through a building opening, but once closed, prevents drafts and energy loss from a house or commercial building into its attic (and other energy losing openings such as crawl spaces). The insulated partition improves upon the insular quality and upon safety as is it can be operated from the stairs or a ladder with one hand. The partition is permanently installed and airtight. It is toughly made and protects its insulation layer, and it is designed to have a variable R-factor.

A zipped insulated partition allows entry and exit through a building opening, but once closed, prevents drafts and energy loss from a house or commercial building into its attic (and other energy losing openings such as crawl spaces). The insulated partition improves upon the insular quality and upon safety as is it can be operated from the stairs or a ladder with one hand. The partition is permanently installed and airtight. It is toughly made and protects its insulation layer, and it is designed to have a variable R-factor.

A swiveling staircase is provided for access to a device disposed above the ground at a distance that a person of an ordinary height is not able to reach. The staircase includes an immobile upright stanchion and a staircase assembly pivotally coupled to the stanchion. The staircase assembly includes a platform on the top of a plurality of stairs. The staircase assembly rotates between a first position where the staircase is docked out of way for storage and a second position where the staircase assembly is facing the front side of the device so that an operator standing on the platform may be able to reach the device.

An improved retractable attic stair apparatus assembly includes a stair component retractable staircase assembly including two shock mount subassemblies, two gas spring subassemblies, and two short railing pipe assemblies. The two short railing pipe assemblies are used as a left and right handrail of the retractable staircase assembly while also supporting the two shock mount subassemblies. The two gas spring subassemblies are at least partially supported by the two shock mount subassemblies. The attic stair apparatus is configured for an installation site in an attic or a garage and includes a first retracted configuration. A deployed configuration allows the apparatus to extend downwardly from the installation site for use of the attic stair apparatus by a user to ascend the attic stair apparatus to access an attic, a garage crawl space, or a garage roof.