A modular crossover system includes one or more platforms, one or more platform guardrails attached to the platform, a plurality of towers supporting the one or more platforms, a plurality of stile assemblies attached to the platforms, or a combination of towers and stile assemblies. An optional fixed ladder may be attached to one of the platforms.

A modular crossover system includes one or more platforms, one or more platform guardrails attached to the platform, a plurality of towers supporting the one or more platforms, a plurality of stile assemblies attached to the platforms, or a combination of towers and stile assemblies. An optional fixed ladder may be attached to one of the platforms.

Disclosed is a method for producing a structural element by joining together at least two separately produced parts where at least one part is made of concrete by cutting it from a volume of concrete and where all parts extend over the entire length of the structural element; a method for producing a staircase by joining together at least two separately produced staircase parts, which are cut from a volume of material and extend over the entire length of the staircase, and a structural element and a staircase which have been produced in this way.

Disclosed is a method for producing a structural element by joining together at least two separately produced parts where at least one part is made of concrete by cutting it from a volume of concrete and where all parts extend over the entire length of the structural element; a method for producing a staircase by joining together at least two separately produced staircase parts, which are cut from a volume of material and extend over the entire length of the staircase, and a structural element and a staircase which have been produced in this way.

A support for raised floors includes a base configured to be rested on the ground, a head on which floor panels can be rested, a lower bracket configured to constrain a riser to the base, and an upper bracket configured to constrain the riser to the head. The lower bracket includes a planar portion configured to be rested on the ground under the planar portion of the base, an end shaped to define a tooth, a raised portion, or a tab configured to be inserted in a corresponding opening or seat defined in the plane portion of the base, which has at least one rectilinear edge tangential to or close to the raised portion.

A support for raised floors includes a base configured to be rested on the ground, a head on which floor panels can be rested, a lower bracket configured to constrain a riser to the base, and an upper bracket configured to constrain the riser to the head. The lower bracket includes a planar portion configured to be rested on the ground under the planar portion of the base, an end shaped to define a tooth, a raised portion, or a tab configured to be inserted in a corresponding opening or seat defined in the plane portion of the base, which has at least one rectilinear edge tangential to or close to the raised portion.

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.

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.

A step for building a staircase, which includes: a base frame provided with a flat support surface configured to be laid and fixed on a ground, a footboard provided with a flat walkable surface, which is hinged to the base frame according to a hinging axis parallel to the walkable surface and to the support surface of the base frame, and a locking arrangement to lock the footboard with respect to the base frame in a plurality of different angular positions around the hinging axis.

A step for building a staircase, which includes: a base frame provided with a flat support surface configured to be laid and fixed on a ground, a footboard provided with a flat walkable surface, which is hinged to the base frame according to a hinging axis parallel to the walkable surface and to the support surface of the base frame, and a locking arrangement to lock the footboard with respect to the base frame in a plurality of different angular positions around the hinging axis.