A platform system comprising a platform structure having at least one modular platform unit with platform connection features on a side surface thereof to which other components can be connected, the other components including at least two of the following: another modular platform unit, a stair unit, a tower unit, a handrail unit, and a ladder unit. A stair assembly is connected to the platform structure via said connection features, the stair assembly comprising a plurality of stair units connected together to provide a number of steps equal to the sum of steps of the stair units.

A stair case (10) having one or more stringers (12), treads (14), and risers (16), with the treads and/or risers being supported on the stringers. The stair case has first connecting elements, and each tread has at least one of the first connecting elements (18) provided at an under surface that tread. The stair case also has second connecting elements (20) that are each provided to a respective one of the risers. The first and second connecting elements are interconnected to secure each tread to one of the risers, and at least one of the first and second connecting elements is integrally formed in the respective treads and risers.

A stair case (10) having one or more stringers (12), treads (14), and risers (16), with the treads and/or risers being supported on the stringers. The stair case has first connecting elements, and each tread has at least one of the first connecting elements (18) provided at an under surface that tread. The stair case also has second connecting elements (20) that are each provided to a respective one of the risers. The first and second connecting elements are interconnected to secure each tread to one of the risers, and at least one of the first and second connecting elements is integrally formed in the respective treads and risers.

Systems and methods for constructing staircases are described herein. The systems include a stringer hanger bracket for coupling a stair stringer of the staircase to an upper floor, two or more tread support structures and a jig. Each tread support structure is configured to couple a tread to the stair stringer. The jig is configured to determine a mounting position of each of the tread support structures on the stair stringer, determine a mounting position of each of the tread support structures on the stair stringer and/or determine a length of the stair stringer.

Systems and methods for constructing staircases are described herein. The systems include a stringer hanger bracket for coupling a stair stringer of the staircase to an upper floor, two or more tread support structures and a jig. Each tread support structure is configured to couple a tread to the stair stringer. The jig is configured to determine a mounting position of each of the tread support structures on the stair stringer, determine a mounting position of each of the tread support structures on the stair stringer and/or determine a length of the stair stringer.

A lifeguard observation station having a support structure for allowing a lifeguard to monitor a pool and swimmers or bathers therein. The lifeguard observation station includes a platform which is configured to accommodate the lifeguard. The platform member has a first edge, with at least a portion of the first edge of the platform member and a portion of the platform member adjacent the first edge being configured to extend to or beyond a pool edge of the pool. When positioned on the portion of the platform member adjacent the first edge, the lifeguard is positioned at the edge of the water or over the water in the pool to provide the lifeguard an unimpaired line-of-sight to the swimmers or bathers in the pool.

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 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.

In one embodiment, a frame and stair system for engaging a wall includes multiple pad assemblies, a distal frame assembly, a lower proximal frame assembly, an upper proximal frame assembly, multiple stair assemblies, and multiple upper panel stair adapter brackets. A lower stair assembly is coupled with a left stair pad assembly, a right stair pad assembly, a left distal leveling pad, and a right distal leveling pad. A middle stair assembly is coupled with the distal frame assembly and the upper proximal frame assembly. An upper stair assembly is coupled with the upper proximal frame assembly. The upper proximal frame assembly is coupled with the lower proximal frame assembly. A left upper panel stair adapter bracket and a right upper panel stair adapter bracket are coupled with the upper stair assembly and are configured to engage an upper edge of the wall.

The present invention discloses a fully-assembled staircase system and an assembly method. The fully-assembled staircase system includes a stair slab, stair steps, stair stringers, landing slabs, steel connectors, and a stair handrail, where a main body of the stair slab is an inclined flat plate structure, lap joints are disposed at an upper end and a lower end of the stair slab LTB, an outer edge of an upper surface of the lap joint is provided with first grooves, one side of the landing slab PB is provided with second grooves, the stair stringer is an inverted T-shaped structure, a top surface of a web of the stair stringer is provided with third grooves, two flanges of the stair stringer are respectively fixedly lapped with the stair slab and the landing slab, the first groove, the third groove, and the second groove after the lapping jointly form a steel-connector groove.