The invention relates to a telescopic staircase to be installed on construction sites for providing a safe staircase for workers during building construction. The telescopic staircase comprising at least one lateral guard comprising a top rail, a bottom rail and at least two newels, the bottom rail having a plurality of connecting holes, and a plurality of tread assembly comprising a tread plate, at least two stringer portions and at least two pairs of support members, each support member having at least one connecting hole, in which the at least one lateral guard includes a first portion being retractable into and extensible from a second portion, in which each support member substantially forms a 45 angle with the tread plate, and in which the support members are to be attached to the top surface of the bottom rail via attachment means through the connecting holes.

A bracket and related method to construct stairways is provided. The bracket includes a top horizontal leg having a first width and a first spacer of a first dimension and a second spacer of a smaller second dimension, and a vertical leg joined with the top leg, the vertical leg having a first height, with a ratio of the first width to the first height being at least 1:2. The method can include placing the top leg adjacent an underside of stair boards, selectively altering or not altering the first spacer based on a preselected gap between the boards, fastening the top leg to the underside of the boards with fasteners while the first spacer and/or the second spacer maintains the preselected gap, placing the bracket vertical leg adjacent a stringer, and fastening the vertical leg to the stringer, optionally while the installer remains above the stairway and stringer.

A bracket and related method to construct stairways is provided. The bracket includes a top horizontal leg having a first width and a first spacer of a first dimension and a second spacer of a smaller second dimension, and a vertical leg joined with the top leg, the vertical leg having a first height, with a ratio of the first width to the first height being at least 1:2. The method can include placing the top leg adjacent an underside of stair boards, selectively altering or not altering the first spacer based on a preselected gap between the boards, fastening the top leg to the underside of the boards with fasteners while the first spacer and/or the second spacer maintains the preselected gap, placing the bracket vertical leg adjacent a stringer, and fastening the vertical leg to the stringer, optionally while the installer remains above the stairway and stringer.

The stair system is made of a deck plate attached to an existing structure (such as a deck) and to the top end of a pair of stringer beams. A base plate is attached to the bottom end of the pair of stringer beams. Next a plurality of steps are attached to the pair of stringer beams, the steps being comprised of a tread assembly, a pair of tread brackets and at least one intermediate support bracket. The steps can be integrally formed or made of modular components which are connected together to form the step. Finally, the decking material is attached to the step.

A modular staircase frame is lightweight, adjustable, and may be brought to a worksite in pieces to be assembled. The modular staircase frame includes two opposing sets of laterally spaced blades, which may be adjustably connected to form laterally spaced ascending frame members. The opposing sets of blades may include a first pair of blades and a final pair of blades to anchor the frame to a first and second surface, respectively. The blades have openings for adjustable attachment of adjacent blades. The frame may also include stiffeners for added structural support. The opposing sets of laterally spaced blades may further include one or more corner blades for changing the direction of the staircase. Once the frame is installed, treads (temporary or final) can be removably installed on the frame to create a staircase.

A pet staircase may be formed by joining modular units to each other in succession and that overlie a household staircase. They are retained in position over the household staircase. Each modular unit has stairs and/or ramps. The treads may be adjusted so that they all are parallel to each other and extend horizontally.

A pet staircase may be formed by joining modular units to each other in succession and that overlie a household staircase. They are retained in position over the household staircase. Each modular unit has stairs and/or ramps. The treads may be adjusted so that they all are parallel to each other and extend horizontally.

A method for building modular stair system comprises assembling a plurality of modular stair units, each of the plurality of modular stair units associated with a single story of a construction, each of the plurality of modular stair units further comprising a self-supporting structure supported by a plurality of corner columns. A first modular stair unit is located on a foundation of a structure. The first modular stair unit is secured to the foundation of the structure. A second modular stair unit is stacked on top of the first modular stair unit, wherein a first plurality of corner support columns engage of the first modular stair unit engage a second plurality of corner support columns of the second modular stair unit. The second modular stair unit is leveled using a connection sleeve that slides within the first plurality of corner support columns and the second plurality of corner support columns. The second modular stair unit is connected to the first modular stair unit to maintain the leveled second modular stair unit using the connection sleeve.

A method for building modular stair system comprises assembling a plurality of modular stair units, each of the plurality of modular stair units associated with a single story of a construction, each of the plurality of modular stair units further comprising a self-supporting structure supported by a plurality of corner columns. A first modular stair unit is located on a foundation of a structure. The first modular stair unit is secured to the foundation of the structure. A second modular stair unit is stacked on top of the first modular stair unit, wherein a first plurality of corner support columns engage of the first modular stair unit engage a second plurality of corner support columns of the second modular stair unit. The second modular stair unit is leveled using a connection sleeve that slides within the first plurality of corner support columns and the second plurality of corner support columns. The second modular stair unit is connected to the first modular stair unit to maintain the leveled second modular stair unit using the connection sleeve.

A deck apparatus for assembly with a pair of opposing brace frames interconnected by a pair opposing connector bases and a deck board top frame having a plurality of deck boards disposed thereon, the connector bases having opposing posts for being received in openings in a lower end of the opposing brace frames ends and the deck board top frame having posts for being received in an upper end of the opposing brace frames, and optionally attaching a stairs riser having a plurality of spaced-apart treads or a ramp riser for extending from a deck surface at a height to a vertically lower support surface.