In one aspect of a bottom indexing tile and support structure, a bottom indexing support structure may be engaged with a top portion of a pedestal. The bottom indexing support structure may be formed with a generally vertical spine having at least one rail extending outward from a distal end thereof and may also include one or more ridges extending upward in a direction parallel to the spine. The spine and rail(s) may be configured to secure one or more bottom indexing tiles, which tiles may be formed with a groove on at least one edge thereof, and wherein one or more rails may be positioned within the groove. The bottom indexing tile may be formed with one or more channels on a bottom surface thereof, wherein each channel may correspond with a ridge of the bottom indexing support structure.

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 landscaping structure incorporates a plurality of metal spikes secured beneath a first plate. A second plate is removably secured to the top surface of the first plate. A cover is removably secured to the top surface of the second plate. The top cover comprises a plurality of materials and physical appearances capable of mimicking a paving stone or similar structure.

A landscaping structure incorporates a plurality of metal spikes secured beneath a first plate. A second plate is removably secured to the top surface of the first plate. A cover is removably secured to the top surface of the second plate. The top cover comprises a plurality of materials and physical appearances capable of mimicking a paving stone or similar structure.

Spiral staircase including a flight held by a central core and an external stairwell, characterized in that the flight and the stairwell are produced by 3D printing from a material.

Spiral staircase including a flight held by a central core and an external stairwell, characterized in that the flight and the stairwell are produced by 3D printing from a material.

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.

In one aspect of a bottom indexing tile and support structure, a bottom indexing support structure may be engaged with a top portion of a pedestal. The bottom indexing support structure may be formed with a generally vertical spine having at least one rail extending outward from a distal end thereof and may also include one or more ridges extending upward in a direction parallel to the spine. The spine and rail(s) may be configured to secure one or more bottom indexing tiles, which tiles may be formed with a groove on at least one edge thereof, and wherein one or more rails may be positioned within the groove. The bottom indexing tile may be formed with one or more channels on a bottom surface thereof, wherein each channel may correspond with a ridge of the bottom indexing support structure.

A stair tread pan includes a plurality of stair risers, each of the plurality of stair risers comprising a uniform depth and width, whereby the stair tread pan consistently satisfies code requirements. The stair tread pan further comprising predetermined assembly tolerances are less than approximately inch for drainage of the stair tread pan in an exterior use. The stair tread pan comprises at least one tread nosing formed into the stair tread pan for yielding a uniform for reliable and durable tread nosing. The stair tread pan further comprising a poor stop at a top end of the stair tread pan for receiving poured concrete, thereby illuminating the need for tea-bars or other concrete containing structures for forming a top landing on the stair tread pan. The the stair tread maybe read a leap replaced without disturbing the structured integrity outside stair tread pan in a building environment.

A modular stair system comprises a plurality of modular stair units. Each of the plurality of modular stair units are associated with a single story of a construction. An upper, rectangular landing comprises a pair of long members connected at each end to a pair of short members. A mid-level, rectangular landing comprises a first pair of members and a second pair of members interconnected at their ends. A first and second plurality of corner brackets interconnects an end of the members with an end of the members of the upper and mid-level landings. The first and second plurality of corner brackets have the variable size depending on the number of the plurality of modular stair units to be stacked in the stairwell. A plurality of corner support columns support the upper, rectangular landing at a top portion thereof and the mid-level, rectangular landing at a mid-portion thereof and removably connected to the upper, rectangular landing and the mid-level, rectangular landing. The plurality of corner support columns have a second variable size depending on the number of the plurality of modular stair units to be stacked in the stairwell. A first stair runner removably connects to the mid-level landing and connects a bottom level to the mid-level landing. A second stair runner removably connects to the mid-level, rectangular landing and the upper, rectangular landing to connect the mid-level, rectangular landing to the upper, rectangular landing. Each of the plurality of modular stair units are organized such that a bottom modular stair unit is placed on a foundation and each successive modular stair unit of the plurality of modular stair units are stacked on top of and connected to a lower modular stair unit.